Description: 10A 20A 30A LCD PWM Solar Panel Charge Controller Battery Regulator 12V/24V with Dual USB Features: 1.Adopting industrial master chip. 2.LCD display. 3.Charge and discharge is available.Its parameters can be adjusted by yourself. 4.Fully 4-stage PWM technology works for it. 5.Short-circuit protection, open circuit protection and reverse polarity protection. 6.Automatic recovery program. 7.With double MOS, calorific value is low. Specifications: Rated Voltage: 12V/24V(Auto recognition) Rated Current: 10A 20A 30A for your optional~ Charging Mode: PWM USB output: 5V/2A Self-consume: >> CLICK