The Sterling Power PCU3220plus is a 36V 20A mains battery charger from the Pro Charge Ultra Plus range — a compact, switch-mode charger built to keep 36V banks properly topped up from shore power or a generator. It delivers a full multi-stage charge rather than a crude constant voltage, so lead, AGM, gel, and lithium banks are charged correctly and held at the right float. Pro Charge Ultra Plus models add selectable battery profiles (including lithium), advanced diagnostics, and remote-control capability via the PCUR remote. Charging Specifications Type AC-input multi-stage battery charger (Pro Charge Ultra Plus) Nominal output voltage 36V Max output current 20A AC input Wide-range AC mains, 50/60 Hz Charge profile Multi-stage (bulk, absorption, float) Battery types Lead-acid, AGM, gel, and lithium Remote Compatible with the PCUR remote control Dimensions, weight & outputs Available on the datasheet — contact us to confirm Warranty Backed by Sterling's factory warranty Key Features 36V 20A multi-stage mains charging Selectable profiles for lead-acid, AGM, gel, and lithium Remote monitoring and control via the PCUR Need exact dimensions, output count, or AC input range? Contact us and we'll confirm from the datasheet.