The Powertech MB3940 Multi-Stage Battery Charger 20A DC/DC is an advanced solution for charging both lead and lithium batteries. It efficiently manages solar and alternator power inputs to charge an auxiliary battery system, prioritizing solar to reduce engine load. This charger isolates the starting battery when the engine is off to prevent discharge. Its microprocessor-controlled circuit switches between six charging modes: Qualification, Recondition, Bulk, Absorption, Check, and Maintenance. Housed in a heavy-duty aluminum case, it supports various battery types including Lead acid, AGM, Calcium, GEL, and LiFePO4. With safety protections like overcharge, short circuit, and over-temperature, it’s a comprehensive charging solution for diverse needs. Features: – Dual input – solar and/or alternator/car battery – 20A max charging current (automatically controlled) – Six-stage Battery Charging – Supports Lead acid, AGM, Calcium, GEL or LiFePO4 batteries Specifications: Solar Panel Open Circuit Voltage: 16~25V max. Rated Output Power: 13.5~15.4V @ 20A Output (Charge) Voltage: AGM/GEL: 14.3V (Boost), 14.7V (Absorption), 13.5V (Float) Lead acid: 14.0V (Boost), 14.4V (Absorption), 13.5V (Float) Calcium: 15.0V (Boost), 15.4V (Absorption), 13.5V (Float) LiFePO4: 14.0V (Boost), 14.4V (Absorption) DC current rating : 20A Operating Temperature : -10°C, 45°C Length : 208mm Width : 136mm Height : 38mm Weight : 0.71kg Packaged Volume : 3.05l Packaged Weight : 1.17kg Packaged Length : 31cm Packaged Width : 20.5cm Packaged Height : 4.8cm Output Type : Bare Leads Type of Batteries : Lead AcidLithium Ferrous Phosphate (LiFePO4)AGM Type of converter or transformer : DC to DC Max PV Open Circuit Voltage : 25V
