I'm trying to use a Goal Zero 25 am Fast charger as the PV input to charged 3 connected 100amp AGM batteries connected in parallel. For some reason, when I use the Goal Zero fast charger, the only thing that shows up on the victron app under Solar is 15.24V (voltage) and 0.0 A (current) and under battery it says 12.70V (voltage) and 0.0A (Current).
Why isn't this setup working?
I tested the same setup but connected a 100 W solar panel to the PV input and the app showed 62 W from solar and 59 W charging the AGMs.
Thanks for any help here.