Equipment Type and Primary Applications
This 12V 20A DC-to-DC battery charger transfers energy from a vehicle’s 12V electrical system to an auxiliary battery at up to 20A. It is designed for RV, van, boat, and off-grid electrical systems using AGM, flooded, gel, sealed, LiFePO₄ (LFP), or lithium-ion batteries.
Performance Specifications
- Input: 12V DC nominal; operating range 10–16V DC.
- Output: 20A rated current; operating current range 18–22A; 250W rated output power.
- Input current limiting: ≤34A.
- Charging modes: 2-stage for lithium batteries and 3-stage for lead-acid batteries.
- Peak efficiency: >85% at 14V DC and 30% load.
- Compatible alternators: smart and conventional.
- Optional RJ11 temperature sensor supports adaptive charging compensation for lead-acid batteries.
- Dimensions: 8.4 × 7.4 × 3.1 in; net weight: 4.0 lb.
Safety Features and Certifications
- Battery isolation protection prevents reverse current between starter and auxiliary batteries.
- Protection against over-voltage, over-temperature, and reverse polarity.
- D+ ignition control enables charging only while the engine is running.
- Certifications: CE and RoHS.
Installation and Maintenance Requirements
Installation requires a 12V DC vehicle electrical system, connection to the auxiliary battery, and D+ ignition control. The optional RJ11 temperature sensor is intended for lead-acid battery charging compensation.
Warranty and Service Information
Branding/References
Product reference: 12V 20A DC-to-DC Battery Charger for RV, Van, Boat, and Off-Grid applications. Package dimensions are 11 × 9 × 5 in, with a gross weight of 5 lb.
Differentiators
Selectable lithium and lead-acid charging profiles, smart-alternator compatibility, engine-controlled activation, and optional temperature-adaptive charging combine in one 20A DC-to-DC charger.