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Rebecca avatar image
Rebecca asked

Display of MPPT jumps to 100%

Hello, I have a BlueSolar Charge Controller MPPT and a MPPT control display. First- according to the display - was the battery showing normal signsof being used: Only 94% left. But then it went even after charging down to 89%. I cutted the power completely and since then it's always at 100%. While in use it switches to 99 or 98%, but goes immediatly up afterwards. The same goes for the other modes, ony the Voltage still makes sense.

I do not have a Bluetooth dongle or GX device and the synchronisation doesn't react.

Do you have an idea, what I could do?

Greetings from Sweden

mppt stateMPPT Control display
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chrichri answered ·

Hi, as soon as the load gets off, the battery voltage rises again. If you set a maximum charging voltage below the open cirquit voltage of the battery the mppt will interpret this as beeing 100% full. This allows to calibrate the state of charge information.

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