37 kw load on powerwalls

[CrazyRabbit]

Grid outage, charging the MY with portable cord, two furnace on trying to drain powerwalls so solar returns. Might as well charge the car up, don’t want to let any power go to waste.
Fans in Powerwalls didn’t come, but it is in the 50’s.

 

[offandonagain]

The adage: charging your EV using Powerwalls is like charging a D battery using AA batteries... does not apply in your case

 

[CrazyRabbit]

Just trying to get solar back up! 16Gw shut down because PW were full.
Plus I’ve really haven’t stress tested them, no magic smoke came out.

 

[GregBallantyne]

First thought is even with 8 PW, doesn't that draw result in more like 3 hours of backup remaining?

 

[CrazyRabbit]

App was telling me 5 hours!

 

[Matt-FL]

 

[GregBallantyne]

App was telling me 5 hours!

Gotta beIieve the app....? I guess I've seen that remaining backup give conflicting results before....

 

[offandonagain]

Gotta beIieve the app....? I guess I've seen that remaining backup give conflicting results before....

It's just an estimate, and that estimate will depend on the time frame used for averaging past home usage (otherwise the estimate would keep changing with each momentary change in home usage).

 

[GregBallantyne]

It's just an estimate, and that estimate will depend on the time frame used for averaging past home usage (otherwise the estimate would keep changing with each momentary change in home usage).

Yes, I've seen this in action on more than a few occasions. A divergence of several days seems like it might be suspect - but probably was fairly momentary. I'm not knocking the Tesla app, I think it does very well in general.

 

[GateFather]

Which model Powerwall and how many? If this is PW 2 or plus wouldn't you need around 7 to get this output? Is that what you have? For 3s I guess this would be 3 PW 3s?

 

[Matt-FL]

In his graphic, you'll see by the powerwalls '8x', that means he has 8 powerwalls.

 

[GateFather]

In his graphic, you'll see by the powerwalls '8x', that means he has 8 powerwalls.

Oh totally missed that! Thanks, makes more sense now!

 

[CrazyRabbit]

I believe PW2 can output 7 kw off grid peek.

 

[Matt-FL]

Yes, 7kW peak and 5kW continuous. You were definitely pushing the limits!

https://www.tesla.com/sites/default/files/pdfs/powerwall/Powerwall_2_AC_Datasheet_EN_NA.pdf