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.
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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
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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:Â 14.0V (Boost), 14.4V (Absorption), 13.5V (Float)
Calcium: 15.0V (Boost), 15.4V (Absorption), 13.5V (Float)
LiFePO4:Â 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 |
