Rich Solar RS-DC20 12V 20A DC-DC Battery Charger for RV, Van, Boat, Off-Grid | Lithium & Lead-Acid Batteries

Features

Wide Battery Compatibility & Optimized Charging

Supports all 12V battery types: AGM, Flooded, Gel, Sealed, LiFePO₄ (LFP), and Lithium-ion.
Dedicated mode-selection switch enables optimal multi-stage charging (Bulk, Absorption, Float) for your specific battery type, maximizing efficiency and lifespan.
Lithium Activation function automatically recovers over-discharged lithium batteries.

Smart Alternator Integration & Starter Battery Protection

Compatible with conventional and smart alternators.
Operates only when the engine is running via the D+ ignition signal, preventing starter battery drain.
Supports generator starts and safeguards the starter battery during extended charging.
*Recommended D+ Wiring: 18–16 AWG copper (cable not included).*

Durable, Efficient & User-Friendly

Rugged & Reliable: Metal enclosure designed for RVs, commercial vehicles, marine, and off-grid use.
High Efficiency & Low Idle: >85% @ 14VDC (30% load), <0.75A idle consumption.
Cooling & Ease-of-Use: Integrated fans + clear LED indicators for simple battery selection and start.

Advanced Safety & System Flexibility

Comprehensive protection: Over-Voltage, Under-Voltage, Over-Temperature, Reverse Polarity, and Short-Circuit.
Red LED fault indicator simplifies troubleshooting.
Isolated Input/Output ensures stable and interference-free auxiliary battery charging.
LC Terminal enables a 50% current-limit mode for older or low-capacity alternators.
Optional temperature sensor provides temperature-compensated charging for lead-acid batteries (not for lithium).