What type of alternator is this DC to DC on board battery charger compatible with?

Works with both alternators. But smart alternators vary voltage, so you MUST connect the charger's IGN (ACC) cable to the Vehicle Ignition Port for them to work properly.

What types of battery does the charger support?

It's suitable for 12V Lithium, Gel, AGM, and Calcium batteries. This charger enables the batteries to reach a full 100% charge. Additionally, it has the capability to revive lithium batteries that have become discharged to a low voltage.

How do l set the battery since there is no display screen?

To change the battery type, press and hold the SELECT button on the side of the battery charger. The LED lights corresponding to each battery type will illuminate in sequence, indicating the available options.

If both solar power and the engine are available, can we prioritize using solar power to charge the battery?

Our product defaults to DC charging. To prioritize solar charging, simply press the SELECT button on the side.

Can solar charging and DC charging be switched automatically?

Charging automatically switches to solar when 1. Generator ON: DC 13V 2. Generator OFF: DC 13V

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Renogy REGO 40A DC-DC MPPT Battery Charger 12V, Dual Input Solar/Alternator

Product ID: 766108624

Details

Brand
RENOGY REGO
Colour
Black
Output voltage
12 Volts (DC)
Product dimensions
5.8D x 23.6W x
Specification met
UL CE FCC

⚡40A high-power charging

🌞670W solar input capacity

📱Bluetooth app control

Description

🔋 Power Up Your Adventure — Never Get Stranded Again!

SMART SOLAR FIRST LOGIC - Cuts fuel costs by 25% by prioritizing solar energy, letting you run appliances all night without draining your engine.
DUAL POWER SOURCE CHARGING - Seamlessly charges via alternator while driving and solar panels when parked for uninterrupted power.
INDUSTRY LEADING 93 EFFICIENCY - MPPT technology extracts 30% more energy from solar panels, charging 33% faster than standard models.
PLUG PLAY WITH APP MONITORING - Install in 15 minutes with color-coded cables and monitor battery health and errors remotely via Bluetooth app.
REVIVE DEAD BATTERIES INSTANTLY - Automatically reactivates deeply drained LiFePO4 batteries—even at 0V—saving you costly replacements.

The Renogy 40A Solar + Alternator Charger is a cutting-edge MPPT DC to DC lithium/gel battery charger designed for RVs and boats. It delivers up to 40 amps of power, supports up to 670W solar input, and features smart solar-first logic to reduce fuel consumption by 25%. With 93% charging efficiency and dead battery revival technology, it ensures reliable, fast charging from both alternator and solar sources. Bluetooth control and rugged weatherproof design make it perfect for off-grid professionals seeking hassle-free, efficient power management.

Specifications

ASIN	B0FCFM5RVB
Amperage	40 Amps
Brand	RENOGY REGO
Color	Black
Compatible Devices	RV, Boat, Deep-cycle Batteries (LiFePO4, Gel, Lead-acid), Alternators, Solar Panels
Connector Type Used on Cable	Battery Clamps/Ring Terminals
Current Rating	40 Amps
Customer Reviews	3.4 3.4 out of 5 stars (7)
Input Voltage	16 Volts
Item Dimensions D x W x H	5.8D x 23.6W x 13.1H centimeters
Item Highlight	Renogy REGO 40A DC-DC MPPT Battery Charger 12V, Dual Input Solar/Alternator
Manufacturer	RENOGY
Number of Items	1
Output Voltage	12 Volts (DC)
Specification Met	UL, CE, FCC
Unit Count	1 Count

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