Hi, I already have 5 of the MPPT 75/15 mit Bluetooth. The first 3 still work perfect without any problems.
But the latest 2 I bought are not ok... every 2-3 nights one of them freezes, so the next day:
- still shown in Bluetooth summary, but no connection possible (loop from 0-100% and again and again)
- battery not loading
- solar 0 Volt
- daily summary in overview is from the day before
Solution: Disconnect both Battery + PV and it's working again.
Both serial number begin with HQ2236* und have the latest firmware installed.
Is there any solution I can try so solve this issue?