Zamp Solar 135W 8A Battery Charger Controller for Gel-Cell/AGM/Conventional Lead Acid WET/Calcium Batteries 15-1782

It is used with gel-cell, AGM, conventional lead acid wet & calcium batteries. It operates 12 Volt & measures 4.09 inch width x 2.4 inch height x 0.9 inch thickness. PWM technology is best for solar systems under 600 Watts & is the most effective way to reach a constant voltage for battery charging.