Renogy CORE 12V 30A DC-DC On-Board Battery Charger with MPPT

Short Product Summary

The Renogy CORE 12V 30A DC-DC On-Board Battery Charger with MPPT charges your house battery two ways — from your vehicle's alternator while you drive and from solar via its built-in MPPT controller. It delivers a correct multi-stage charge to lithium, AGM, gel and flooded batteries, keeping your auxiliary battery topped up on the move and at camp.

Why This Product

Smart alternators won't fully charge a lithium house battery directly, and solar alone is slow on cloudy days. A DC-DC charger solves both: it takes alternator power while driving and solar power when parked, and converts it into a full multi-stage charge — protecting your starter battery and getting the most into your house bank. The 30A is ideal for smaller systems and compact builds.

Key Features

• 30A DC-DC charging – efficient charging of your auxiliary battery.
• Dual input – charges from the vehicle alternator and from solar.
• Built-in MPPT solar controller – maximises harvest from your panels.
• Multi-stage charging – correct charge profile for a healthy battery.
• Battery compatibility – lithium (LiFePO₄), AGM, gel and flooded.
• Protects your starter battery – isolates and prioritises correctly.

Ideal For

• Caravan, trailer & 4x4 dual-battery builds charging on the move
• Smaller / compact setups combining alternator + solar charging
• Lithium house-battery upgrades behind a smart alternator

Local Support from 4Matt Campers

4Matt Campers serves the Western Cape and Cape Town, and ships across South Africa — helping clients build reliable 12V and off-grid power systems. We'll help you wire the DC-DC charger correctly to your alternator, solar and house battery.

Technical Specifications

• Brand: Renogy
• Series: CORE
• Type: DC-DC on-board battery charger with built-in MPPT
• Charge Current: 30 A
• System Voltage: 12 V
• Inputs: Vehicle alternator + solar (dual input)
• Charging: Multi-stage
• Battery Types: Lithium (LiFePO₄), AGM, gel, flooded

What's Included

• 1 × Renogy CORE 12V 30A DC-DC Charger with MPPT
• User manual

Optional Fitment / Upgrade Notes

For a correct install, it's worth confirming:

• Cable sizes from starter battery to charger to house battery
• An ignition / D+ trigger where required for smart alternators
• Your solar array voltage/current is within the MPPT input range

Complete Your Setup

Browse the full Renogy range and 12V electrical & power gear. Pair it with a lithium battery and a solar panel for a complete charging system.

FAQ

Why do I need a DC-DC charger?
Smart alternators don't fully charge lithium house batteries directly. A DC-DC charger converts alternator (and solar) power into a correct multi-stage charge, protecting your starter battery.

Does it do solar too?
Yes — it has a built-in MPPT solar controller, so it charges from your alternator while driving and from solar when parked.

30A or 50A?
30A suits smaller batteries and compact builds; step up to 50A for bigger banks and faster charging. Ask us to match it to your setup.