Verified current equipment

Renogy 12V 40A DC to DC Battery Charger

Second-generation 12V 40A alternator charger with smart-alternator support, RS485 communications and optional BT-2 Bluetooth monitoring.

Best for: Alternator charging for 12V RV and auxiliary battery banks.

Key facts

Maximum output: 40 A
Overvoltage Protection: Yes
Rated Power W: 584 W
Efficiency Pct: 94 %
Operating Temp Max C: 60 C

CurrentDc To Dc ChargerReviewed: verifiedMarket: USVerified 2026-09-14

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Manufacturer reference (not an affiliate link)Official manual

VERIFIED EQUIPMENT RECORDRenogy12V 40A DC to DC Battery ChargerDc To Dc Charger · Product photo not yet cleared for display

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NO ELIGIBLE BUYING OPTION · UNITED STATES

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Specifications and source evidence

Start with the key facts above. Open the complete evidence only when you need the detailed values and citations.

View all 18 verified specifications and sources

Efficiency Pct

94 %

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Maximum output

40 A

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Operating Temp Max C

60 C

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Operating Temp Min C

-25 C

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Overcurrent Protection

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Overtemperature Protection

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Overvoltage Protection

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Rated Power W

584 W

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Recommended Input Fuse A

60 A

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Recommended Output Fuse A

50 A

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Reverse Polarity Protection

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Supports Agm

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Supports Custom Profile

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Supports Flooded

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Supports Gel

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Supports Lifepo4

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Supports Smart Alternator

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

Supports Standard Alternator

Yes

12V 20/40A DC to DC Battery Charger · Electrical/general data and FAQ

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Why you can trust this record

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