My grid point is set at 30W. Why did I still draw so much energy from the grid yesterday, there was clearly enough sun and battery capacity (14kwh). 1.5kw on AC inverter and 5.kw on Smart250. Is there something going wrong here?
asked
Why is my ESS so inefficient? 7.7kwh drawn from grid when lots of sun
maybe its just undershoot/overshoot problem. here is the same of the 3 phases exported from VRM for a time period. I don't know if this means the grid point is then at these values for that minute on average or if its just and instantaneous value
| 2023-03-28 11:05:17 | -1024 |
| 3/28/2023 11:06 | 60 |
| 2023-03-28 11:07:17 | -1134 |
| 2023-03-28 11:07:24 | -996 |
| 2023-03-28 11:07:42 | -873 |
| 2023-03-28 11:08:18 | -1036 |
| 2023-03-28 11:09:17 | -889 |
| 2023-03-28 11:10:17 | 72 |
| 2023-03-28 11:11:17 | 0 |
| 2023-03-28 11:12:17 | -10 |
| 2023-03-28 11:13:16 | 566 |
| 2023-03-28 11:13:17 | 450 |
| 2023-03-28 11:14:18 | -23 |
| 2023-03-28 11:15:17 | -140 |
| 2023-03-28 11:16:17 | 129 |
| 2023-03-28 11:17:17 | 346 |
| 2023-03-28 11:18:17 | 126 |
| 2023-03-28 11:19:17 | 32 |
| 2023-03-28 11:20:17 | 78 |
| 2023-03-28 11:21:18 | 124 |
| 2023-03-28 11:22:17 | 128 |
| 2023-03-28 11:23:17 | 23 |
| 2023-03-28 11:24:17 | 78 |
Now I think it might just be the definition. To grid might be the sum of all the power going out, i.e. when you see a negative on a single phase. It might not be the amount when the total of the 3 phases is negative for some amount of time.
So I need to check the grid meeting to see what that reflects. I.e. when I see 4kwh to grid and 5kw to grid, the grid meeter reads 1kw as hoped.
