How many Tesla Powerwall 3 batteries do I need?
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- čas přidán 29. 08. 2024
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What about bandwidth? Say you have a 200 amp service, or maybe a 320amp service, capacity aside, how many powerwalls do you need to satisfy a demanding home for a whole house backup on 200amp or 320amp service?
My understanding is that PW3 uses LFP batteries, which can be discharged to 0%
I’d be hesitant to do that.
We all want 4, but I think this video overestimates how many you really need. Sure more is ALWAYS better, especially if you want longer term backup (IE no grid for days) but saying you need 4 batteries with a daily use of 60kWh in combination either severely underestimates solar production and implies a really bad system size/location.
Fair point. It’s always a sliding scale, depending upon what customers want to accomplish with their back up power. 👍🏻
I thought Tesla recommends 100% DOD.
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I thought the only time you need a powerwall is at night. During the day the solar panels are producing electricity, so technically ir you use 66 kWh per twenty four hour period. I should be using under 10 kWh at night.
During an outage, you’ll be on batteries and will need to cover all your consumption.
@@allsolartexasThis is not true. The sun does not stop producing during a power outage. I have a 9.2 kw solar system with 2 PW3’s and my household uses about 50kW per day. I can run indefinitely off grid. The solar produces enough for my daily needs, fills my two PW3s and even lets me charge my MYP during the day and go to bed with 100% in the Batteries. This guy is over selling batteries.
@@DonThorvund that depends on the amount of sunlight. Most outages occur during storm activity where production is cut by 50-70% due to cloud coverage. There are many assumptions that go into sizing the right sized system.
Getting Cybertruck soon = 9 PW3. So I only want 1 PW for TOU and seamless backup.
Thats 123Kwh + 13.5 from the PW....136.5 kwhr. 48A x 2. Ok, so prob dont want to drain the truck down to zero....but still.
Woohoo! In the words of Napoleon Dynamite… “Lucky!”
I think you still need at least 1 PW to be able to PowerShare
Really hoping to see them expand this new system to the existing cars. Drives me nuts that Musk proclaimed Vehicle 2 Grid as "stupid" and doesn't want to offer it for years, then suddenly adds it to the Cybertruck.
My Model Y has more battery in it than like 4 power walls. Before a storm I charge that to 90% just in case, and it sure would be nice to be able to pull that back if needed.
@@JohnVanderbeck agreed!
Do you know if the bi directional charging capability is compatible with any EV capable of V2L? Looking at a BYD and want to be able to plug it into a powerwall 3 to give the cars charge to the powerwall overnight rather than by extra powerwalls, we don’t drive much so the cars battery will get topped up with solar each day along with the powerwall
By directional charging is a separate feature that will require different equipment. Currently Tesla vehicles do not offer by directional charging, so we need to be with the buy directional EV charger and some other vehicle that provides that option.
How about an update to this using the Tesla DC expansion unit?
No I don’t, but I’ll look into it. Thanks!!!
@@allsolartexasany update? For my needs, I just need one PW3 and one DC Expansion.
What is the maximum discharge rate with 2 x Powerwall 3 for a whole of home backup use case.
23kWh AC
es-media-prod.s3.amazonaws.com/media/components/panels/spec-sheets/Powerwall_3_Datasheet_IN5Bniz.pdf
What happen if that gallon of milk Don’t have a fridge where to maintaining a cold because the hurricane comes every year and take the electric away for one to six months with one person leaving in the same house?
😂I love it! Thanks for watching!
Because it is a DC only coupled product, I think the Tesla Powerball 3 will be a flop. There are still many applications where the installer is going to want to AC couple the solar to a battery system. My guess is that you will soon see a revamped power wall 2 once Tesla realizes how poor their sales are on the power wall 3.
You’re probably right. Time will tell! Thanks for watching.
@@allsolartexas Thanks! I think they need to offer both. AC coupling? Yes. DC coupling? Yes. Just like Sol-Ark.
@@boblatkey7160 ive been told that there is a version that can do AC coupling?
@@USNEM Yes! Powerwall 2. 😂 they need to do both AC coupling and DC coupling or they are going to lose market share.
I’ve run DC charging for 5 years living full time in my RV, the advances of the Powerwall 3 are
- the panels are only connected to the powerwall 3
- the power 3s input is AC from the panels and outputs DC to the Gateway
- no AC/DC conversion has less loss to charge the batteries .
- the inverter is part of the power all and cheaper to install.
- add panels, only wire into the powerwall
- add an extension battery only the first powerwall is touched
- the gateway sees AC from the grid and powerwals, the gateway controls the switch
- hopefully adding panels or batteries will not require the utility to sign off on. The upgrades really don’t touch the grid.
But of course if you currently have panels the are connected to a device a device the converts to DC before the batteries you’ll have to change the panel the to powerwall wiring or use a powerwall 2.
I think this will be a great success.
I want 4 for me!!!
Yes, sir! Thanks for watching!