Solar Panel Voltage Regulator 24v
My 315 watt 24vdc panels normally output 39vdc to the mppt charge controller this is the way that amperage is created in the panel through voltage amps convert to volts in dc without a load to consume them you need to use a charge controller between the panels and fans to limit the voltage into the fan pwm controller will work just fine as.
Solar panel voltage regulator 24v.
Source : pinterest.com