I’ve read, and also calculated myself, that the efficiency for charging and discharging is about 77%.
Now I’ve entered this value as the efficiency instead of the default 90. I’ve set it to trading, and based on tomorrow’s prices, buying at night and selling in the evening would be worthwhile. But it isn’t doing that. Should I enter 87.5? Does the 90% need to be calculated twice?
The path /Settings/DynamicEss/SystemEfficiency is the expected roundtrip efficiency. So, If you would assume a 92.5% one-way efficiency, you’ll enter 0.925² ~ 0.85.
The Scheduler will take this (+ battery cycle costs) into account, when determining if a trade is worth it.
You should best target a value matching your observed efficiency at the desired charge / discharge power, cause that is where DESS finally operates and where the vast majority of kWh will move.
So, you should also calculate your observed efficiency around these figures, taking a efficiency from a 300W load is not a good match.
Yeah, so enter 77 here, for example.