Multi-Stage Battery Charger – Powertech MB3940

$ 195.00 each incl. GST

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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.
– 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
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