Sargent DX20 20A DC-DC Battery-to-Battery Charger with Connector Kit (DX20-KIT)

Sargent DX20 20A DC-DC Battery-to-Battery Charger with Connector Kit

The Sargent DX20 is a 20-amp DC-DC battery-to-battery charger that intelligently charges your leisure battery from your vehicle’s alternator while you drive. Unlike a simple split charge relay, the DX20 uses a multi-stage charging profile to deliver a proper, controlled charge to your leisure battery — maximising battery life and ensuring a full charge on arrival at your destination. Supplied with connector kit for a complete installation.

Key Features

• 20A output — efficient charging from the vehicle alternator while driving
• DC-DC technology — multi-stage charging profile for optimal battery health
• Fixed voltage output — suitable for standard lead-acid and AGM leisure batteries
• Supplied with connector kit — everything needed for a complete installation
• Compatible with Sargent leisure vehicle electrical systems
• Compact unit for easy installation in motorhomes, caravans, and campervans
• Protects the vehicle’s starter battery from excessive discharge

Why Choose DC-DC Over a Split Charge Relay?

A traditional split charge relay simply connects the two batteries together, which can result in an incomplete charge and reduced battery lifespan over time. The Sargent DX20 uses a proper DC-DC conversion and multi-stage charging algorithm to deliver a full, controlled charge to your leisure battery — regardless of the vehicle alternator’s output voltage. This is particularly important for modern vehicles with smart alternators.

Smart Alternator Compatibility

Many modern vehicles use smart alternators that vary their output voltage, which can prevent a split charge relay from working correctly. The DX20’s DC-DC technology handles variable alternator output, making it the correct solution for modern tow vehicles and motorhome base vehicles.

Installation

Supplied with connector kit for straightforward installation. Electrical work on leisure vehicles should be carried out by a competent person. Contact us if you need advice on installation or compatibility with your existing Sargent system.

Part number: DX20-KIT