Renogy DC to DC Charger 12V 30A
Product description
Renogy's DC to DC charger brings multi-source charging and MPPT efficiency to vehicle battery systems, letting solar panels and alternators keep service and start batteries topped up while you travel. Ideal for RVs, marine craft, and cars, this 12V 30A smart on-board charger supports lead-acid, lithium, AGM, gel, and flooded batteries and helps reduce fuel use when solar is available.
Key points
The charger prioritizes solar input when both alternator and solar are active, so you get more renewable charging before drawing from the engine. Built-in MPPT maximizes solar harvest and the three-stage charging profile of bulk, boost, and float manages voltage precisely to maintain battery health according to the manufacturer. The unit also includes multiple protections against over-voltage, over-current, high temperature, reverse polarity, and reverse current, which adds confidence in rough conditions.
Specifications
- Name: Renogy DC to DC Charger
- Type: On-board battery charger
- Voltage: 12V
- Capacity: 30A
- Weight: 3.13lbs
Why it’s worth it
Compact and relatively light, the charger fits into tight installation spaces, making it practical for small compartments and crowded engine bays. It charges start and service batteries simultaneously and can solar-charge a start battery at low voltage, which reduces downtime. One limitation to note is that Bluetooth monitoring requires the optional BT-2 module, and RS485 offers more advanced telemetry with compatible displays.
How to use it
Install the charger according to vehicle wiring guidelines and protect the circuit with the recommended 40A ANL fuse for safety. Connect solar and alternator inputs and select the correct battery profile to match your battery chemistry. You’ll appreciate the peace of mind from the unit's multiple protections and the ability to monitor status with Renogy One or RMS-DCDC screens when paired.