Is a Tesla Powerwall 2 Worth the Money?

Is a Tesla Powerwall 2 Worth the Money?


– I just got my Tesla
Powerwalls installed, and I’m sort of in love with them. It’s just such a cool feeling to know that you no longer
need the energy grid for, you know, your daily life. However, when I started
to look into the data, it came clear to me that not everyone should buy one of these. So I wanted to dig into just
kind of my experience so far, what I’ve learned, and
maybe help guide you on whether or not a Tesla
Powerwall makes sense for your home. Let’s dive in. (upbeat music) The latest version of the Tesla Powerwall, also called the Tesla Powerwall 2, has just under 14
kilowatt hours of energy, 13.5 is what they list, and this is part of the Tesla ecosystem, where if you get solar, and
you have the home batteries, and then you have the cars, you have a lot of
freedom and independence, based on just the stuff you’re generating and storing at your own home. Most houses use around 28 kilowatt hours of energy per day, so with two of these, at 27 kilowatt hours, more or less, you’re pretty good to
be a full day off grid, and then of course within those 27 hours, if the sun comes out even a little bit, your solar panel should
charge them back up, giving you this kind of off-grid, energy independent feeling. Now typically these run around
$7,000 with installation. Every install is different, so when you go through this process, you have to fill out a form, take pictures of lots of things, and send it to them, and then they come back with a quote. I earned these two Powerwalls from the Tesla Referral
Program back in 2017. Thank you to everyone that used my code, because these are super cool, and as I mentioned, I am
really, really stoked on them. Now the ones I got were the white ones. These are the standard ones you buy. You may have seen some other folks that received the red ones that were actually physically signed by JB, and Elon, and Franz. That’s super cool, but it actually kind of worked out better, because I think the
white ones look better, and as you’ll see when we
talk about installation, we had to put them outside, and it would just be kind of a shame to have these really fancy ones, with the hand signature, sitting out, getting rained on every day. Speaking of installation, it actually was kind of a challenge. The original idea I had was
to put them in the garage, but the garage, where
they would be located, was over 100 feet from where
the electrical panel is. My house, built in the 1950s, put the electrical panel
kind of on the opposite end, and so it was gonna be too far, because there’s a communication wire that has to run, and it
runs at a very low voltage, so over 100 feet it just
doesn’t really work as well. Now they can change that apparently, but then they’d have to kind
of reconfigure the system and all that, and it just
didn’t make a whole lot of sense to put them in the garage. Plus, if they are in your garage, they have to have these
barriers in front of them, so you don’t hit them, or they have to be mounted high enough that they would be above
the standard hood height of a vehicle, which is pretty high. My garage is pretty short,
so it just didn’t make sense, so that plan was out. The next challenge was to figure out where to put them outside. We would just mount them on the house, however they can’t be next to a bedroom, and so we had to find a place where we didn’t have a bedroom, and we could put it, and so it ended up being just right between the studio that I use to work, that I use to make these videos from, and our master bathroom. It’s kind of right next to the AC unit, and it’s close to where
the electrical panel is, so it all made sense. One of the interesting things is that we had to basically
make a concrete pad for them to sit on, because it’s not, there’s
no concrete there, and I was able to find one for about $50 from a local building supply company. So this is a tip, if you are in this boat, trying to do this, their initial thought was, you need to actually pour concrete, you know, go make molds
and make a concrete pad, but a local building company
here in San Diego just had one that I could buy for $50,
so I went and did that. Worked out great. So in addition to the Powerwalls, they both had to have their
own AC disconnect switches. Then, you had to have a gateway and a whole new panel setup, with basically every circuit from the old electrical panel rewired into this new one, and
basically now the grid itself is upstream from the rest of your house, meaning the grid can go away, and you can still function. In fact, that’s how the
primary function works. Typically if my solar system
isn’t generating enough power, I am pulling from the battery. So it’s really cool, and
it does give you the sense of independence and freedom, because in theory you could go off grid. However, that doesn’t really
make a whole lot of sense. One thing Tesla just added was the ability to look
at very detailed data about how you’re using your energy. And what glorious data it is. So in the app you can see that I have my Powerwall
here, it’s currently charging. There’s two of them listed there, and you can click into the power flow, which is easily my favorite
diagram of all time, showing exactly what’s
happening with your energy. Here we’re looking at over four kilowatts of solar energy being generated right now. 3.6 of that, or 3.5
going back to the grid, so I’m building up a credit
with the electric company here, and .5 of it powering the stuff that’s currently used in my house, and occasionally it’s powering up, or it’s charging the Powerwall. I can dive into the history of this, and see very detailed
stats of what’s happening with all these different sources, and how the energy is flowing
from one place to the other. And until recently, you
could only look at today and yesterday in the app. Now, you can actually click, and look at a week, or even a month. I don’t have that much data, but you can kind of go back, look at the lifetime of it, etc., etc. So they’re giving you just
really cool visualizations, and ways to understand this data, and I love that,
obviously, that’s my thing. But prior to this, you
had to go into the APIs, and kind of reverse engineer it, so thankfully they did this, and one of the cool things is, if you don’t like these visualizations, I particularly don’t find bar charts are good over time series, which is the data we’re looking at here, you can download the data, and obviously I did that. Either way, I think it’s really cool that they’re giving you this data, and it’s really awesome just to see this. I actually made an old iPad
into sort of an art stand, with that power flow thing, so anytime we have people over, I can kind of explain what’s going on. It’s just a really
beautiful visualization, so cheers to the Tesla
team for making that. The bar charts and the other stuff, I think can be better, but hey, it’s a step in the right direction, and you’re freeing the data about this, which is amazing. One of the challenges I’ve found so far with the Powerwall is charging my car. So, typically I charge at work. I have a charger here, and
that kind of fills up mine, but Jenny charges our Model 3 at home. Now she doesn’t drive a lot, so she doesn’t charge that often. You know, maybe once or
twice a week at most, but when she does, if you think about it, the Model 3 Long Range has somewhere around 78 kilowatt hours of energy stored, and if she needs to fill that thing up from close to zero, this
27 kilowatt hours stored in the Powerwalls are just a snack. That’s not even, not
even approaching enough. On a regular basis, if you went to work, and came back and charged every night, you would probably be fine, but essentially what’s gonna happen is we’re just gonna just
hammer that battery, and then have to go to grid power. Now thankfully, because we’re
using even less grid power than before, we’ve built up enough credits to where it all kind of washes out. Going back to the app though, there are a few ways to
setup your Powerwall, and I think it would make sense just to kind of talk about these, and give you my thoughts on them. I’m not sure I’ve had
enough experience yet to be the expert at this, or really figure out what’s best, but when you go into the
Customize option here, you can see there are different ways to kind of use the energy
stored in your Powerwall. The first one is Backup-only, where you never really use the Powerwall, except in the case of a backup, so in the case of a storm,
or something like that. The other one is this Self-powered one, where generally all your
energy’s gonna be coming out of there, when, instead
of pulling from the grid. I like this, because that
means I’m just reducing the actual load on the grid, and I’m becoming more self-sufficient. Now, in there you can, and I’ve set it here to 20%, you can reserve a certain percent of the battery for power outages. For here in San Diego, it doesn’t make a lot of sense, because we really don’t have
power outages regularly, but if you do, you may want to set that up to 30, 40%, whatever
really makes sense, or just go on the backup only. So, I choose the self-powered mode, because I feel like it’s
just really good being, you know, kind of off
grid as much as possible. Now there’s also this time-based control. So if I click on this advanced one here, what you’ll see is, it actually will learn the peak and off-peak schedule, and so here in San Diego, as well as many other parts of the world, or other parts of the country now, are going to this time of use rating, where you pay more for the peak rates, versus the off-peak, and
this is pretty common. And you can actually kind of design that, and set it up to match whatever your local company charges you. That way, let’s say here in San Diego, it’s between 4:00 and 9:00pm
are the super high peak, I think it’s like 53
cents a kilowatt hour, which is nuts. You can say, “Hey, use the
battery during that time, “but 12:00 to 5:00am, when
energy is much cheaper, “don’t worry about it. “Go ahead and pull from the grid, “just kind of let the battery be.” This actually could save
or help with that problem with charging the car, where if the car is designed to charge between 12:00 and 5:00am,
and you use this mode, then it may, you know, not
use the battery at all, and go straight to the grid, which seems like a better deal. So, I’ll have to play with this over time, and see exactly what makes sense, but right now I’m just kind of in love with this idea of being self-powered, and being off-grid as much as I can be, living in a relatively
suburban kind of area. And then of course you
have this Storm Watch, which I kind of mentioned, but they actually have a system here that monitors the weather patterns, and looks for when
there’s a storm coming up, and it will kind of prep
the battery for that, so you don’t have to
really worry about it. You just leave that on. If there is a storm coming that looks like it may cause power, it’ll adjust the energy
flow to optimize for that, so that way if you guys do have an issue, it’ll be fine. So, really cool. Really advanced, you know, and like I said, I just love this concept of being off-grid, or kind of
as independent as I can be. So speaking of going off-grid, it definitely is possible
with solar panels, and batteries, but the
cost of being connected to the grid, and having
it as a reliable backup, is pretty low, it’s $10 a month, and for me that’s
something that’s worth it. You know, it’s cheaper than Netflix, and a lot of other things
you’d probably spend money on, and it gives me reliable backup power. But another thing you could do, is if you don’t have solar right now, you can take advantage of
the federal 30% tax credit, the federal ITC it’s
called, and bundle this in. So, you would actually
get 30% off the cost of your Powerwall, making the economics much more palatable, much better, much more in your favor, versus just buying them outright, where honestly the economics
don’t make a lot of sense for most people. Let’s look at my actual
utility bill from last year, and just kind of see
how this would shake out without the Powerwalls, but with solar. Now most months I actually did not produce more than 100% of the
power that I consumed, so I was still using the grid, even though I had a
relatively large solar system on my house. But, you know, due to the
power company giving me a $500 credit for having solar, I ended up not owing anything
for all of last year, other than that $10 a
month connection fee, which was kind of a separate thing that you just have to pay for. And the reason this works is because of Net Energy Metering. Now NEM is a sort of controversial topic. There were some recent changes to it, but in the end, the way
it works is you sell back, or you, you know, give back energy that is in excess of
whatever you’re consuming at that moment. So what you do is you kind of use the grid as a battery here, and you
give them that excess storage, and then, when the sun goes down, and your solar panels
are no longer working, you essentially buy it back. You use those credits. So if you’re generating more
energy than you’re consuming, you have a negative balance. In general, this is a super common thing that makes the economics of the Powerwalls really not
worth it for most people. Now you may be wondering, hey, do I have Net Energy Metering? Well I’ll put a link to a website there, that’ll let you know, but 38 states, plus a
lot of the territories and provinces of the
United States offer this, so chances are you do. So, in that case, when you have solar, and Net Energy Metering, it doesn’t really make hardly any sense to actually put your money into this, except for one case I’ll
talk about in a second. But, let’s assume you
don’t have solar right now, you could actually benefit from this, and a recent Stanford study showed that across the warranty period, the 10 year warranty that
you get on the Powerwalls, if your average per kilowatt hour price is above 13.9 cents, you would at least break even, if not come out, you know, well ahead. Now that comes out to about 12
states in the United States. Some of the places with the
most expensive electricity are the ones you can imagine, Hawaii of course being
number one as always, so in those places, if
you don’t have solar, this could make a lot of sense, by doing what I like
to call rate arbitrage, another term you may see out
there is called peak shaving, where essentially when you have the lowest time of use rating,
the cheapest electricity, you fill these up, and
then during the highest, the peak time, you live off of them, and that was in the app where I showed you that customize, where
it’ll actually figure that out for you. You just kind of go in and tell it when is the expensive, the peak rates, versus the off-peak rates. But that other case
where it does make sense, is if you live somewhere that
have regular power outages. So, in the United States, this is kind of the sub-Atlantic area, the south that is on the coastal side, where hurricanes regularly come, and, you know, knock out power, or cause other kind of problems like that, these things could be
really beneficial for you. You know, it could
literally be the difference between life and death in some cases. There are a lot of cases, and a lot of people in the world that live in areas with kind of insecure, or unstable electricity grids, and so if you live in one of those places, this could be something that, whether or not the economics
make a whole lot of sense, having energy when the grid is down, and that being a regular thing, is totally gonna be worth it for you. So it’s not one of those things where you’re just looking to save money. You’re looking to just
have a better quality of life with this, and
this definitely offers you that opportunity. And lastly, I really can’t stress enough how awesome it feels to look and see that I am really not using any electricity from the grid at all. I mean it’s just incredible seeing this, and knowing that I have control over how I’m consuming energy, and what’s happening to it. It really is a great feeling, and so, you know, we’re human, and you know this is why
behavioral economics exist, because we’re not machines, this isn’t just a math equation here, and so, you know, that
is definitely valuable, and so if that’s something
that is valuable to you, and you can do things like pair it with a solar purchase, or get, you know, one of the discounts from the
S-CHIP program in California, or a similar one where you live, then this can totally make sense, right? It financially may not be 100%, but knowing that you
have energy independence, and security, could be enough for you, depending on your financial situation. So I’m curious what you
guys have to say about this. Do you have a Powerwall,
or are you considering one? Do you have solar? Let me know if there’s anything I missed in these calculations,
because that’s essentially what we’re trying to do here, is explore sustainable
technologies like this, and see how they’re transforming
the world around us, through the lens of data, of course. So thank you for watching. Don’t forget, when you free the
data, your mind will follow. I’ll see you guys back
here in the next one. (upbeat music) Hey thanks for watching the video. I hope you got something out of it. Now if you wanna dive a little bit deeper, become a part of the
Teslanomics community, consider joining us on Patreon. So, what we have setup
are different things and ways to engage,
such as a Discord group, which is like this chatroom, that is just the folks
that support the channel through Patreon. I’m on there almost daily, engaging in conversation about how Tesla, and others like them, are
changing the world around us for the better. So, if you’d like to learn more, go ahead and go to
patreon.com/teslanomics, and I hope to see you there soon.

About the Author: Michael Flood

100 Comments

  1. Is it possible for the Model 3 to communicate to the battery storage and run the following "if" statement?
    If the power pack is greater than 90%, and if the car is plugged in, then charge the car ? with a bottom set limit say 60% battery
    This could top the battery up without the need to send your electricity back and into the grid… thanks

  2. gets 2 free powerwalls
    says to sell tesla and buy bitcoin
    wut on earth

    obviously theyre not worth it….in any way shape or form
    1. 500$/kwh. only place they can make money is if you want to pay HEAVILY through the nose for power backup which will get used a few times a year. unless your fridge has 1000$s in perishables (no) pointless. Unless you run a datacenter at home meh.
    you can buy an entire model 3 just for the battery and get it cheaper /kwh and get a free car so hey why not.
    2. even in CA wheres its like 15c/kwh delta between high and low times
    youd have to do 500$/.15$/kwhcycle so 10 years? sure I guess its subsidized by the government with tax payer dollars so its only 300$/kwh but then add in the labor etc. and right back to around a 10yr roi….if you can possibly even find a .15$/kwh delta and fully charge and discharge at the max/min

    3. power price deltas will go away WELL within 10 years.
    any old utility company can call up tesla if they desired to and buy 100x what you can afford. install it far more efficiently at the power plant and buy the grid scale size solutions that are far cheaper to start with making your device obsolete as there wont be ANY DELTA offered by the power company.

    4.
    why do you think they havent done it yet?
    battery prices are in free fall. the only people buying are consumers for fun, people who need them for off grid, EV cars where they are worth the expense and peaker plant replacements that either have to build a new rarely used plant or go with batteries.

    storing energy at home makes zero sense. the labor cost of installation and economy of scale kills it
    tesla already makes and sells a far better grid solution

  3. these videos are plain annoying for anyone who knows anything about economics….if it worked……….why wouldnt the utility company buy one 1000x larger, far cheaper, and that costs far less labor/kwh to install?

    they would, if the prices werent in free fall. 800$/kwh to 100$/kwh in 5 years?
    why invest now, had you back in 2013 youd be in the red currently
    every powerwall 1 buyer who didnt require it then has lost money

  4. It makes no sense in snow country if it is upstream of the grid. Most of the power outages happen when there is a heavy snowstorm and the outages can last a few days. During these storms, there is no solar power recharging the battery. You could buy a whole home generator for the same price.

  5. Great video Ben. One thing – net metering isn’t an issue If you have a big electric bill. It never goes back, you use all the sun has to offer. So I have a 7kw propane generator I am using now on a critical circuit sub panel. Ordered a power wall and 6kw solar from Tesla. If the grid dies I can run off the battery and charge with solar or flip to the generator to charge the batteries. I could hang out for two weeks or more with no grid or sun. Can also plug my car 220v 30 amps into the 7kw propane. So the powerwall is an awesome micro grid and backup, so worth it for safety and power!

  6. If I understand your complaint of the model 3 taking more power than the powerwall has… you can plug in every night with amps dialed down and use the battery but you choose to plug in less frequently and use more in a shorter time? Or am I missing something?

  7. I can speak to this. I own a very large solar installation company that services SD, Orange, LA and Riverside counties as well as Phoenix, Tuscon and just now, last Vegas. Around 850 systems per month in total. We are brand agnostic and by that i mean we install solar and batteries both from and for companies such as Tesla, LG, Sunrun, SolarEdge, Enphase, Pika, Panasonic, sharp and sunpower.

    In the areas i mentioned, it makes the most sense to use batteries IF you pull around 950 kWhs from your utility or more AND you have enough roof space to offset 120% or more of your bill with panels in California due to Time of Use billing. Vegas, tuscon don’t need it. Phoenix should if you have SRP as your utility but not APS.

    As far as the SGIP credit (CA) you mentioned, use caution as that fund is limited and for FY2019 is already gone.
    Lastly if you don’t have enough capacity to fill the battery or batteries in 2.5 hours or less, skip it. It won’t serve you well and it won’t last near as long. Good luck with your system!

  8. Wow, that information was awesome. It is really cool to see how the system works and the control you can have overall. It is really neat and I would love to have the solar, power pack, and soon to be tesla all in one household. Its very economical and a large step towards a cleaner future.

  9. I'm considering and definitely researching on how to go off grid and really wants solar and battery pack combo, but calculating the price of electricity on where I live compared to the bare minimum system that I wanted, it's not feasible currently, cause I'm looking at more than 20 years ROI, that's even assuming all system running perfectly until then.

  10. One interesting consideration would be if your car was at home during daylight hours with solar panels.
    Lots of people work from home or work shift work.
    So their car battery could be charges while the sun is shining.
    Would this make it less beneficial to have a Powerwall? Or does it depend on how much energy your array produces?

  11. Has somebody asked what the guarantee term on the battery is, and if there is now added value to your property? If the property value has risen, you can write this off the cost of ownership and tip the equation in its favour right?

  12. Had one for over two years, been there have t-shirt, never use grid, all self powered.. I have an ev and winter charge it for free at a university that has 7,000 plus solar panels. No bills , just cheques from feed in. Best thing I've ever bought.

  13. last time i checked, in New Zealand at least there are other batteries made by other companies that are far cheaper. Another good question is why doesn't tesla do V2G? nissan do it via CHAdeMO but thats limited to where nissan have decided to sell it and is very expensive.

  14. HI Ben, looks like a great system. I got solar a few years ago, but battery systems weren't really available at the time. The storm watch feature is interesting, but the main feature that makes this useful is the fact that, because your batteries are in between the solar AC/DC inverter, and the grid export meter, your inverter does not sample the AC frequency directly from the grid, but can get this from the BATTERY INSTEAD. This means, if there is a power outage, your battery is charged and your system stays up ; in a non-battery system, like mine, if there is a power outage, the inverter shuts down, and I am without power… so Storm watch is presumably getting you to fully charged within 3 hours or something like that ? Maybe you can set how aggressively it charges … but this would be for nought if you were sampling AC frequency from the grid.
    The larger battery systems, such as Powerpack installations done by Tesla for SC Edison and the power company in Adelaide, Australia, have a major role to play in 'frequency response' when the grid AC frequency drops, and this helps to keep things stable… in a traditional power grid setup, the very large coal-fired or nuclear power stations put out 200-800MW, and their stability (the turbines involved have a lot of inertia) was used to set the frequency of AC power… in this new world, where more and more 'dirty' power stations are being taken offline, frequency response, keeping a reliable 240V (UK) 110V (US) becomes more challenging, and this is where grid batteries really are the 'swiss army knife' tool to rescue all manner of situations.
    Enjoy your videos, keep them coming.

  15. We don't have net metering in Finland and there's no phase neting (3-phase system) in our area. I'm hoping the 100$/kWh batteries would come. With 55kWh battery my family could be self-sufficient from march to september and the payback time would be 10 years on current electricity prices.

  16. It is a bit sad.. how power Networks are working.. they should pay you more for your solar power than you need to pay to get some power from the grid! Or at least equal.. usually we get 10 cents per 1 kWh Solar power and we have to pay 25 Cents or even 30 Cents.. in Germany.. for power from the grid 🙁 Powerwalls are only nice.. if the user can actually control it.. and not the PowerGrid-Owner! and Not TESLA..

  17. It also helps if you live in the right area. They were not nationwide in the USA last year at least. No Tesla certified installer in your area, no Powerwall for you. Not saying it's a bad business practice, but their reach isn't everywhere last I checked. I check now and again.

  18. Ben, could you set up the system so you can charge your car only off the grid so it doesn’t impact your home battery?

  19. Quick question If gride is down then is solar system stop power flow to the gride automatically ? OR it gives power to the neighbours house , as gride is interconnected ?

  20. I would never trust a Tesla product. Their roofs catching fire brought to light the really subpar quality and design of its panels. They cut corners everywhere.

  21. These things cost $7k and you need 2 of them according to the video so $14k divided by, lets say, $100/month electricity bill = 140 months or 11.6 years before you break even on having the thing installed. So the warranty is expired before you ever break even. Analysis over.

  22. well da only braindead would buy it on a whim there is a lot to think about like how much sun does your part where you live get,how many stuff/apliences does your house have,how many panels and what type/capacity and so on also you need to monitor the system so you know exactly when to charge or turn on or depending on local utility buisnes model you mangage to sell some if have extra and stuff like that its not like oh just buy and that's it.

  23. Anyone have a system in the part of the country that experiences four seasons? I’d like to set up a solar array with a TP2 and a model 3, but we can go weeks without a sunny day in my neck of the woods.

  24. How much time it takes for you to cover the investment cost until you really benefit financially? Here in Sweden it takes around 15 years, so unfortunately it is a no go yet :/

  25. Too complicated. Get a third POWERWALL2 and go 100% off grid. $10 connection charge is low, and is VERY dependent on the utility. Many utilities may charge much more, even if you draw zero power they have other charges beyond connection fees.

  26. I want a power wall but cant seem to find the info that will work with solar and power company. but you video is saying otherwise. gues the power wall has changed.

  27. Tesla needs to use the car batteries as a backup for our home power supply systems. Hope they’re working on this.

  28. Have 10KWh solar, + wind turbine, use a fair amount of power (winery) + Model S, probably something like 6-7K $/yr, without solar. Lately average yearly bill <$300. Considering Powerwall, Tesla app says I need 3 or 4. Kinda spendy at this point, even with rebate. Would have multiple benefits: Optimizing TOU metering, instant backup power for Brown-outs (PGE has pretty much guaranteed there will be several 3-5 day outages this fire season in NorCal).Talked to the Tesla Energy folks, seems there are financing options.

  29. I wish we had incentives here in Canada. To set up even just solar (no powerwall) it's just not cost effective at over $10k for 14 300w panels. Might see a return in 20 years so the cost is still too high. Your system here would be about $30-$40k and still wouldn;t cover 100% of our usage. It really is a wealthy person gadget for eco bragging rights. What power companies need to do is convert to wind, solar and hydro and not gouge people. Fortunately where we live we have hydro and it's relatively inexpensive but still way more than what it actually costs to produce. Energy should be government controlled – not private.

  30. Hi there. I am currently running an Outback 24v solar system and have 3000 amp hours of sealed lead acid batteries industrial size. Would the powerwall 2 system benefit me at all as I need approximately 30 KW to get me through the day and into the next day. My sealed lead acid batteries require a lot of power to top them off each day. I typically see about 32 KW of charge from the solar to bring the batteries to 100% charged. Lithium does not need power to keep it up to 100% after the battery's reach their maximum. I am configured independent from commercial mains but I have them to fall back upon if needed on bad weather days. Another question is what temperature is required to keep the batteries happy?

  31. Great video, Ben. You’ve convinced me I don’t really need a Powerwall. Here in cloudy, cool Seattleish the value of solar is pretty marginal, I pay only 11 cents/kWh. I’d still love to have it if only for the stability, our electric bill varies wildly over the course of the year vs a fixed solar payment and power credit. That, and so we could keep the AC cranked down in the summer.

    But I see the Powerwall wouldn’t be much use, we get frequent outages but nearly always in the dark fall/winter months when solar couldn’t possibly recharge it during the day. Sounds like our money would be better spent on an old fashioned backup generator.

    Someone convince me I’m wrong, that little iPad data display is just too cool.

  32. connect 2kw inverter directly to cars 12V battery
    battery pack to 12v inverter on car is 1500watts and the battery can probably supply 500W who knows. reset it if it trips.

    plug in fridge and all the lights in your house
    boom powerwall for free that has 40-100kwh of storage vs 13kwh

    wait its not free its 20$ i guess but still
    would be surprised if tesla could even tell and refuse warranty to fix it
    for all they know you like to play some loud music with an amp on the car

    its not even the energy use. you just need 2000 watts peak for lights and the fridge when it kicks on and you're golden

  33. Do they let you use the Powerwall for peak shaving in California now? I have a non-Tesla solar system with the StoreEdge already installed in anticipation of adding a house battery. I live in a rural part of San Diego where I would basically be using the house battery during power outages instead of hassling with the generator. I could certainly buy a lot of gasoline to run the generator for the cost of a battery but I still like the idea of having that control. My system was set up originally to work with the LG Chem battery but I understand that Tesla has a DC charging battery now. Another issue is running air conditioning as I don't think any of the battery systems are able to do that at a reasonable cost. It also sucks that I lost my previous net metering agreement with SDG&E when I added onto my system and now have TOU net metering. I'm way over producing so I still won't have a bill other than the set fees but irks me that I'm selling it to them at 4 cents and they're marking it up to someone else during the day.

  34. Wow the timing of this video on my feed couldn't have been more useful as I sit here alone in my house with no electricity and a single extension cord running to my fridge connected to a generator outside my kitchen screaming away at me for hours on end as I sit here and wait for power to be restored. Or death. At this point I don't care anymore.

  35. My Solar System is scheduled to be installed in September 2019. It’s a 12.4 kW system. It was recommended that i hold off on getting the Storage unit for a couple of years when they will be cheaper and of better technologies (we hope). Is one Tesla Power Wall (13.5 kW) enough for my 12.4 kW system? I was wondering why you have two Power Walls? This video is very timely for me. Thank you.

  36. Here in TN we have Tennessee Valley Authority which produces all electricity for TN and surrounding states. Our local power company CEMC buys power from TVA and sells it to homes and businesses. The problem is that TVA has the protection of the state constitution which allows it to enforce the policy that local utilities such as CEMC must either buy ALL of its power from TVA or buy NONE from TVA. This policy effectively eliminates the possibility of net metering since if I send unused solar power back into the grid I am considered to be selling power to CEMC. Since CEMC would not be purchasing 100% of its power from TVA, this kind of net metering is strictly prohibited. TN is ranked 47th out of 50 states in being solar friendly even though it is a very sunny state. The rules need to be overhauled but our state government lacks the desire. Sad.

  37. I live in Alabama. Our state is very unfriendly to solar sadly. I live in the country and my power is interrupted when the wind blows literally. I would love to have a power wall but it's just not in my budget so I had to come up with my own powerwall. I have a golf cart that has 8.4 kw of batteries so i purchased a 2500 watt pure sine wave 36 volt inverter from china with remote control for around $200. Also purchased a 30 amp automatic transfer switch for $75 and a small circuit breaker box for $15. Got some very thick wire, cant remember how thick, with plug in connecters that i can connect and disconnect my golf cart to the inverter. I have all this mounted on the wall in my garage where the golf cart is parked. I have a 20 amp circuit that comes from my outside box into my garage. It feeds into one side of the transfer switch and the inverter feeds into the other side of the transfer switch. The output of the transfer switch goes to the small circuit breaker box. I have a 15 amp circuit breaker in the box that is connected to my light in the garage. This light is on a circuit coming from the electrical box on the inside of the house. I basically just turned this circuit around. This is the same circuit that runs all my tv, satellite and computer and lights in my living room and luckily also feeds my tv in my bedroom. Where the circuit dead ends in the inside box, i put a interlock on the breaker so that it stayed off when the main breaker was on. So if the power goes off, I don't have to get out of my seat, i just push the button on the remote control for the inverter to turn on and it automatically changes over to the inverter power and feeds all my living room and more. If the power is going to be off for awhile, i go to the inside box and turn the main breaker off and also turn of any power hungry devices such as hot water heater and ac units and turn on the breaker to feed the box. I have all led lights and my refrigerator is very energy efficient so it all works very well and it's so nice not to have to deal with a loud generator outside. My next plans are to add solar panels and a controler and start leaving the inverter on to save electricity. So far i have less than $500 in this. I don't count the golf cart batteries because i already had them and it was something i was going to have anyway. And ps. I love your system and your so right, it is a good feeling knowing your not dependent on the power company so much!

  38. Do you have to pay fro charging at your work? and after a year or more, do a full economic break down and see if powerwall worth it. You should charge more at home for those that dont have luxury to charge at work, but maybe do that the 2nd year to be able to compare cost and usage of electricity.

  39. Califonia should be at the top for price per KWH. Almost 48c when Tier 4 hits, and lets be honest, NOBODY EVER stays on tier 1 or 2… NOBODY. I was in California and had solar installed, they did not offer net metering, it was a buy back program which EFFIN sucked ass cause me as the customer of Solar lost out on a lot of KWH credits with there lame buy back program. Central California residence will know this. Great video, informative… California is a must for battery installments… no questions ask. Gett'r done!

  40. i live in Dallas Texas and have been wanting to go to solar and tesla battery for home use….do you have any info for this area???

  41. How people can get used to this and how much of a genius Elon musk is I'll never understand. Elon and his company are the future.

  42. Hi Ben, great video, thanks for putting it up. In order to use the Tesla SW you showcased, do you need to have the solar panels from Tesla or just the Powerwall? I am currently planning to put solar panels on my roof, considering the Powerwall also. Roof needs to be repaired before solar installation … that is going to be not cheap

  43. In Texas our old energy plan before solar system was free power 8pm to 6am. You could have a bill of 0$ with maybe 3 or 4 powerwalls.

  44. 32 Dollar Cents per kWh in Hawaii is expensive ? In Germany you have to pay up to 45 US Dollar Cents per kWh xD

  45. I'm a poor and can't afford this but I'm doing a DIY powerwall based on (your mate) jehu's PCB, it's a lot of work but can be done for under $1k.

  46. I am looking at a type of PowerWall but I live in Thailand so I am looking at LG. I have panels and from time to time we have power outages the longest was two years ago for almost 3 hrs but it is not a big concern. I want to rely less on the grid. Already our bills have gone down from around 220$ per month to 110$ and this is without a power buy back plan which we are joining. As soon as the PEA (electrical company) implements the buy back which was promised over 18 months ago.

  47. The only issue I have with home lithium batteries relates to it being the best use of the lithium itself (and cobalt, and nickel)? Yeah, it's cool to have a Powerwall and nice to have half a day worth of kwh sitting ready when the power goes out but that is a lot of lithium that might not be best tasked to help the environment. The best use of lithium is replacing gas/diesel in transportation. Lithium is of limited supply and mining it is not great for the environment. I'm not so sure using lithium to arbitrage utility rates ranks very high especially when nat gas and nuclear are available during the peak periods (as with SDGE). I think it would be better for SGIP money to go to increasing rebates for solar and EV's, especially since the Fed rebates are being cut.

    * I'm in San Diego with SDGE, Chevy Volt and 7.5MW/year solar covering 100% of my usage.

  48. You didn’t do the basics what exactly are you saving per month and what is the breakeven time after all that crazy installation

  49. Bottom line is cost and the payoff is not there for me. I am reminded that as a society every structure has the ability to give back to a grid for credit. Thank you for this video.

  50. I'm curious as to what the off peak rate is for electricity in San Diego.
    Here in Montreal there is a 40.65 cents CAD daily connection charge and 6.08 cents CAD per kWh for up to 40 kWh per day averaged over a month. excess usage is billed at 9.38 cents CAD per kWh.
    There is no night time off peak discount.
    Hydro Quebec is a Government run provider with 99% of power coming from renewable hydro electric sources.

  51. I’m confused now 🙂 I live in California and I was thinking to buy a smaller solar + powerwall versus a larger system to create credit. What should I do ?

  52. I never have had my electricity go off for more than three hours and in total the outages were less than a day in my lifetime. Doesn't make sense as a backup.

  53. I got a quote for solar in WA state in late 2018 but the $48,000 price (after sales tax but before fed credit) for 11.9 kWh with a payback period of over 15 years wasn't worth it. There are also some state incentives that expired in 2018. In 2019 they just passed a WA law where you don't have to pay sales tax on a solar system and Tesla's new solar offer is less expensive for roughly the same capacity so I probably need to take another look. We have had only one outage in the 2 years we've lived here so the powerwall isn't likely worth it for sure.

    I'm still looking for WA specific resources that help determine if a Tesla solar system is worth it or not.

  54. Ben, great video, I am more than ever considering purchasing a power wall, mainly for the ability to use stored power during peak rate times here in Ca.

  55. Hey Ben, if you want to charge the car off grid then plug it in and charge at lowest amperage basically like charging from a 110 outlet when solar is most active. Your car will charge and so will the powerwall Plus it won't overwhelm the Powerwalls at the same time I believe the max output from both PW is 10 kWh.

  56. With all the money you are spending and the "you cant install it on a bedroom wall"… I would have put a thick stainless plate behind it and a cover incase that thing goes up in flames…some cautions scare me, that is one of them

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