ESS Throttling

I have noticed lately that if "Optimised with battery life" is enabled, and the doc limit is set to 80% for instance and the batteries is at 50%, the MPPT throttle output to match only the max charge current and the source the load power from the grid. As soon as I lower the limit to 50% or below, the MPPT throttle up, and charge the batteries with the same power as before as well as the loads. Am I missing a setting somewhere? I have played around with "without battery life" and this do not change anything.

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Juraj Nikolov commented · Jul 14, 2023 at 07:08 AM

@Wannibi

I had the same problem.

In my case, upgrading MPII to ver. 505 is fixing this problem (charging and discharging batteries from / to grid)

But I rather think that somewhere in the firmware there is a bug in how MPII evaluates the AC-in & AC-out measurement and then it goes crazy :)

Check what values the MP shows you and measure it with a clamp ammeter :)

I'm guessing that the clamp ammeter will have different values than the MP, it will show quite differently :)

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gabius commented · Jul 15, 2023 at 10:33 AM

Same issue, I’m not the only one reporting it, but the answer is « your configuration must be false » anyway it worst without trolling if I stay under 1400w.

So nodered, and when more than 1400w inverter mode only.

It fixes it by now

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