Apollo Solar - Model T80HV - High Voltage TurboCharger Charge Controller - Brochure

180 Volt maximum PV open circuit voltage The T80HV works with the higher voltage PV modules. For example, some of the Sanyo HIT modules have Vmp of 51.75v at 50o C which will not charge a 48 volt battery, but they generate up to 79.88 volts open circuit at -40o C. Two of these modules in a series string will generate 103 volts at Vmp, but the Voc is almost 160 volts which can damage the 140/150 volt charge controllers. The T80HV is designed to withstand 200 Voc, run MPPT to 180V and to operate up to 160 Vmp. They work well with the Sanyo HIT modules.