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My second hand mppt has a very annoying issue. Whenever i set my battery setting to user defined one. It changes back after some time- randomly to rotary preset. Here the bulk voltage is much higher than i prefer for my battery pack- thus my BMS gives an error message during charging.
I am wondering the mppt is faulty- any hint here? I tried reset / disconnect reconnect everything - no remedy yet. FW is the latest…
Probably best to take it in for service. If it's less than 5 years old, it's still under warranty. The first 4 numbers after the HQ give year and week of manufacture.
@kissjoe Plz check that the rotary switch is seated (clicked) onto the preset, and not halfway between presets.
Halfway caused problem a few years ago for a contributor.
