The Renogy 20A DC-DC charger lets your van or rig top up its house battery bank while you drive — no solar required. Connect it between your starter battery and your lithium or AGM house battery, and it automatically charges at up to 20A whenever the engine is running.
Charge Profiles: Multiple — set to match your battery type
Protection: Over-voltage, over-current, reverse polarity, short circuit
Operating Temp: -4°F to 131°F
Why You Need a DC-DC Charger
Modern vehicles with smart alternators reduce voltage when they detect a full starter battery — which means a simple battery-to-battery connection won't fully charge your house bank. A DC-DC charger regulates the input and outputs a proper multi-stage charge profile, protecting your lithium battery and ensuring a complete charge on every drive.
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