Rather pleasing how well the Actual solar generation followed the Forecast (red dots) all morning.
Rather *less* pleasing that the battery was fully-filled by 13:00 so generation was curtailed down to about 7kW because of the site export limit imposed by the grid operator.
I really must sort out some mechanism to force-export from the battery during the evening peak, to create space in the battery for the next day's generation.
Currently investigating #PredBat to achieve that.
@davidMbrooke I limit the charging rate (orange) based on remaining forecast solar vs. spare capacity.
For instance, if at 10am the forecast predicts 10 kWh of solar left that day (after subtracting domestic load), but there's only 5 kWh of spare capacity in the battery, I reduce charging rate to 50%. Calculated every hour so it adjusts to actual conditions.
This ensures that the battery charges slowly, continues to soak up some of generated power, and avoids clipping of the AC. Works really quite well.
@timbones Thanks Tim. That approach wouldn't be quite 'aggressive' enough for me, since I've already set it to prioritise Export when there's *any* Generation - and only charge the battery when the Export would exceed my 5.5 kW grid limit.
The same thing's going to happen again today, since the battery is still 50% charged from yesterday. If I could dump some of that 50% to the grid after 16:00 and have the battery closer to 10% at 08:00 that would let me store more of the generation.
david M brooke
Timbones