Hello to everyone,
I'm writing because recently I encountered an issue with my solar system (correctly working untill some months ago) and I hope that someone here can solve it.
My setup is as follow:
- Semi flexible MONOCRYSTALLINE solar panel 105W with this characteristics
V Pmax (V) 20,16
I Pmax (A) 5,26
Pmax (Watt) 105,99
Vca (V) 23.04
Icc (I) 5,63
Eff. cell % 15,42
- Victron energy MPPT 75/15
- Green Power AGM Battery 12V 100Ah
I live in north Italy and the results of a test made today at 2PM are these:
Mutimeter voltage directly out of the panel 19.6V
Current directly out of the panel 2.6A
Multimeter voltage at the end of the cables 19.5V
Current directly at the end of the cables circa 2.6A
The I connected the cables to the MPPT 75/15 (with battery not fully charged 12.8V connected and no loads) solar voltage displayed by MPPT is circa 14.6V, the same result with multimeter directly on the MPPT terminals. Current showed is 0.3A.
So the MPPT doesn't charge the battery..
After that I disconnected the battery from the MPPT and the voltage displayed is 19.2V and 0A.
Fuse is ok.
What could be the problem? Damaged solar panel or MPPT??
Thank you for your answer.