Is there enough data here (screenshots taken seconds apart, before and after 2kw kettle is turned on) to conclusively say cell1 has a problem? Or could it just be out of balance?
It has almost twice the voltage drop across it at 125a than the other 3 cells. 130mV compared with 62-82mV
Note: Each of the cells are made up of 4 parallel 120ah prismatic cells. The battery is 4s4p
I've also noted that while current is being applied by the charger, the voltage increases, as you would expect, but when the current drops to zero (not negative), the voltage drops across the battery. I don't remember it doing that before.
And despite having more sun than ever, I haven't seen my cells get over 14v in ages.
It has almost twice the voltage drop across it at 125a than the other 3 cells. 130mV compared with 62-82mV
Note: Each of the cells are made up of 4 parallel 120ah prismatic cells. The battery is 4s4p
I've also noted that while current is being applied by the charger, the voltage increases, as you would expect, but when the current drops to zero (not negative), the voltage drops across the battery. I don't remember it doing that before.
And despite having more sun than ever, I haven't seen my cells get over 14v in ages.
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