yesterday, my EP800 battery suddenly dropped below 20%, down to 3%. in 10 mins. It’s in self-consumption mode, which should prevent it from dropping below 20%. Is it a red flag to the controlling system or bad batteries? The whole system only 1 year old.
Have you ever performed a battery calibration?
If not, it’s quite possible that the displayed 20% is no longer accurate and could actually be much lower…
After a calibration, your BMS should recalculate the SOC values and display them correctly.
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P.S.: The 20% SOC low protection is, of course, only valid for your current SOC low value; if you’ve set a different value, the 20% is no longer accurate…
Unfortunately, the “Grid” diagram isn’t visible in your graph. It’s possible that your home is already connected to the grid, but the battery level is still dropping because it isn’t being charged—or isn’t allowed to be charged.
Thanks for the info!
if you refer to the battery maintenance under advanced settings, I will give a try. I thought the system should do it routinely without human.
20% is SOC is the default threshold, I didn’t change.