Hello, I just bought the SmartSolar 250/60 and I observe that the voltage on app is too different than the multimeter measurement.
As you can see in screenshot (taken at night), the controller reads 25.79V on battery and the multimeter 30.12V (measured on the controller’s screws and on batteries).
There is also a big difference on panel’s voltage, for example in the afternoon was ~110V on app and ~125 on multimeter (don’t have a screenshot right now).
My system runs on 24V (2*12V 200Ah batteries), with 3 PVs in series (Bifacial Luxor 540W). No fuses between batteries and controller.
Is there any malfunction on controller?
Thanks in advance.