Solar Battery Simulator doesn't stop charging at the end of off-peak #200
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davefiddes
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Mar 8, 2025
…cms#200) Only use the desired charge rate for off-peak charging when within the off-peak period. This means we don't hit the desired SOC but don't import more expensive electricity. Tests: - Verified with lower 1kW charge rate SOC only gets to ~50% - Verified with 3kW charge rate, SOC reaches 100% and which is maintained until end of off-peak period and discharge starts
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With the proposed fix and a 1kW charge rate the simulated behaviour looks like:
With a 5kW charge rate it becomes:
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There appears to be a problem when the charge rate and battery capacity are too low to charge the battery to desired SOC by the end of the off-peak period. The charging continues until the desired SOC is reached even though this may be many hours after the end of the off-peak period. I don't think this is desired behaviour or how battery charge controllers operate (I have no practical experience of any system yet).
You can see the behviour with the default app config with a capacity of 8.5kWh but the max charge rate reduced to 1kW:
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