Solar charge controller weird voltage reading
Hello, I have 2 x solar panels installed. Each with 25V and 3,7 amps. The solar charge controller is called "CMT 30" and is supposed to be PWM. Now, if I read the voltage on the controller on ...
Forum Discussion
Welcome to the forums.
The panels are about 95 watts @ 25 volts. But the PWM controller drags the voltage down to just 12.7. That may yield less than 50 watts of power per panel.
The system may maintain the battery bank and slowly recharge them when the RV is in storage--but won't do much charging at all when the RV is in use, given that the parasitic loads may be consuming more energy than the panels harvest in perfect solar charging conditions.
You could improve things by getting an MPPT controller--but it may be best to ebay this system--and replace with something that has a lot more capacity.
The panels are about 95 watts @ 25 volts. But the PWM controller drags the voltage down to just 12.7. That may yield less than 50 watts of power per panel.
The system may maintain the battery bank and slowly recharge them when the RV is in storage--but won't do much charging at all when the RV is in use, given that the parasitic loads may be consuming more energy than the panels harvest in perfect solar charging conditions.
You could improve things by getting an MPPT controller--but it may be best to ebay this system--and replace with something that has a lot more capacity.
