SUNSAVERMorningstar's SunSaver is the world's leading small solar controller forboth professional and consumer applications. This technology provides: Proven Reliability PWM Battery Charging Consistent High Quality Features Is approved for use in hazardous locations -Class 1, Division 2, Groups A, B, C, D. Series design (not shunt). No Need to derate. Fully encapsulated in epoxy potting. Ability to parallel for 40 amps or more.