... of MPPT solar charge controller which own 99% efficiency, 12V/24V/48V auto recognition. Please check the following details: ... three stages (fast charge,constant charge,floating charge)7.12V/24V/48V system auto recognize for easy control. 8. Nominal ... system2800WOutput CharacteristicsSelectable Battery Types (Default type is GEL battery)12V/24V/48VsystemSealed lead acid, vented, Gel, NiCd battery(Other ...