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Why is my battery charging limited to 40A (SOLVED)

So the sun is out, and I find that my battery is charging from solar rather than from the grid (no "grid" tick in this timeslot). I am on "Priority Load" but the load is low so instead the power is going into the battery. Interesting, though, when the sun gets even brighter the charge is limited to 40A and the inverter is exporting to the grid. Why should that be? Nothing seems to be set in the configuration close to this value. Except maybe for "Grid Charge"which is 45A. Now I come to think of it, the grid charge yeaster day did seem to be only 40A not 45. What is going on? It must surely be a BMS - but the batteries are at 7 degrees (risen to 11 now they are charging). It is a 200AH battery (2x SUN-BATT-3.12) so that would seem odd. And 7 degrees (air temp) would seem to be a bit high for it to be throttled back by the BMS. Any ideas?

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Steve (UK:MK)
Steve (UK:MK)
Mar 12, 2023

I knew that you could make custom graphs, but I did not realise the choices included stuff like this. I should have read the manual. Oh, wait .. :-)

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