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Anyone know if/how this works off-grid as backup power?
Interesting. What is your source for that assertion??...the powerwall needed to do offgrid won't be available this year.
If you mean with the grid down, yes. Solaredge, or other manufacturers, will have an off grid version too. But the powerwall needed to do offgrid won't be available this year.
So there's going to be a version of the power wall that CANNOT work without the grid? Not even as backup?
Interesting. What is your source for that assertion?
I think "off grid" means NO connection to the grid. Think remote mountain cabin or island home.
The 10 kWh Powerwall works when the grid is down, that is its purpose. However it's 1200 cycle NCA chemistry doesn't have the cycle life for off grid use. Tesla makes the 7 kWh "daily cycle" Powerwall for off grid applications. It has NCM chemistry and will last 5000 cycles.
GSP
However it's 1200 cycle NCA chemistry doesn't have the cycle life for off grid use.
Are NCA batteries okay sitting at 100% SOC for long periods of time? Presumably, the 10kWh PowerWall being used for backup will be sitting at a high SOC for most of it's life. It has to be ready when needed, right? Or, will the software charge it to 80% and then use it as a buffer for the solar array during an outage?
I have been wondering this but never got around to asking the question.
I understand that difference between 'off-grid' and 'back-up' use...
What I can't for the life of me figure out is how this;
View attachment 86349
works if there is a grid failure...
Interesting. What is your source at Tesla that supports that statement?The 10kWh powerwall has been specially formulated to sit at 100% SOC and have <5 (?) cycles per month.
Interesting. What is your source at Tesla that supports that statement?
I suspect that the 10kWg PowerWall does not sit at 100% SOC but I do not know if that is correct or not.
grid failure doesn't matter in this scenario since the pic you posted is OFF GRID. there is no grid-tie in here. you'd be 100% off grid and no need for paying anything to an electrical provider at all. The grid can fail all day long and it will never affect you here since you aren't connected to it.
The inverter referenced in that diagram is UL1741 and CANNOT independently operate off-grid. To my knowledge there currently exists no inverter that can accept the ~350vdc of the Tesla Powerwall AND operate off-grid... EVERY off-grid inverter I know of is 48vdc and MUST use a charge controller. They cannot be tied directly to a PV array.