Hello, I'm in the permitting phase for a 9.72 kW PV system installation.
At the same time, I've been getting quotes for the PowerWall 2. My goal is to have a grid-tied system AC connected to the PW2s, that can still charge and use the PWs when the grid goes offline.
Now I've seen a number of forum numbers with large PV systems whom are getting by with one PW. I.E. ecarfan has a 9.8 kW system with one PW1. Shygar has a 7.5kW system with one PW2.
So does anybody else know exactly why we can't just have one PW2 for grid and off-grid?
Meanwhile, my AC is on a 50A breaker, but the label says it only needs a max 35A breaker. I'll need two PWs to back-up the AC?
At the same time, I've been getting quotes for the PowerWall 2. My goal is to have a grid-tied system AC connected to the PW2s, that can still charge and use the PWs when the grid goes offline.
- Telsa says I need two PWs because 9.72 kW dumping 40.5A (@ 240v?) is too much for one PW.
- Infinity Solar, which also does PW installations, says I can get by with one PW.
Now I've seen a number of forum numbers with large PV systems whom are getting by with one PW. I.E. ecarfan has a 9.8 kW system with one PW1. Shygar has a 7.5kW system with one PW2.
So does anybody else know exactly why we can't just have one PW2 for grid and off-grid?
Meanwhile, my AC is on a 50A breaker, but the label says it only needs a max 35A breaker. I'll need two PWs to back-up the AC?