olys sdc20 pwm 12v/24v 20a solar charge controller lcd regulator for solar- panel charger

model number sdc20 maximum charging current 20a weight 255g charge mode pwm system voltage 12v size 132 x 105 x 43mm battery type lead acid (gel, agm, flooded) -automatic recognize 12v or 24v system. -pwm charging,high precision temperature compensation.