Hi Yeah, my inverter is 24v.
Ok, so at 24v I would need a controller of: 9panels x 100watts = 900watts/24v = 37.5 , so a controller 50amp or more?
Is there anything else I need to look at on the controller?
Read something about total voltage capacity from panels need to be catered for.
MPPT or PWM? a 60amp MPPT is a lot pricier than ea 60amp PWM