So, it seems the sequence for a safe off-grid test would be:
1. 3 Powerwalls installed at 25% capacity.
2. House is pulling about 40kwh a day.
3. 16.32 system probably will produce about that.
4. Step One: At around 8 a.m. turn on Powerwalls, -- based on what I have seen, they will begin powering house.
5. Step Two: When powerwalls take over, disconnect main service.
6. Step Three: Turn on solar.
7. Solar should slowly take over home load, and then begin charging PWs.
8. When PWs reach 98%, inverters would shut solar down.
9. After dusk, shut off solar.
10. At some point in evening, turn main service back on (with solar off).
11. Shut powerwalls off. Test complete.
In this order there should be no issue with any back feeding to grid, although during install the test they ran resulted in about ten minutes of backfeeding yesterday.
1. 3 Powerwalls installed at 25% capacity.
2. House is pulling about 40kwh a day.
3. 16.32 system probably will produce about that.
4. Step One: At around 8 a.m. turn on Powerwalls, -- based on what I have seen, they will begin powering house.
5. Step Two: When powerwalls take over, disconnect main service.
6. Step Three: Turn on solar.
7. Solar should slowly take over home load, and then begin charging PWs.
8. When PWs reach 98%, inverters would shut solar down.
9. After dusk, shut off solar.
10. At some point in evening, turn main service back on (with solar off).
11. Shut powerwalls off. Test complete.
In this order there should be no issue with any back feeding to grid, although during install the test they ran resulted in about ten minutes of backfeeding yesterday.