RV & mobile

DDN Series DC-DC charger with MPPT

Charges the house battery from the alternator and solar at the same time, and can recharge a flat starter battery. 12V and 24V.

Part of the LIBERGRID system

The DDN Series combines a bi-directional DC-DC charger with an MPPT solar charge controller. While you drive, it charges the house battery from the alternator. When you stop, it charges from solar, and it can share that solar with the starter battery too.

It is the charger TBB specifies for LIBERGRID. The 24V models suit trucks and larger vehicles.

Models

DDN1220	12V, 20A
DDN1230	12V, 30A
DDN1245	12V, 45A
DDN1260	12V, 60A
DDN2430	24V, 30A
DDN2460	24V, 60A

Features

One unit charges from the alternator and solar panels, so no separate solar controller is needed.
Charges at full rated current from both sources at once.
When parked, solar also tops up the starter battery if it runs low.
Engine start assist: from the app, the house battery recharges a flat starter battery, ready to start in about 10 minutes.
Bluetooth app monitoring and firmware updates, and silent fanless cooling.

Where to buy Datasheets and manuals

Compare models

Model	House battery	Charge current (12V / 24V alternator)	Max solar array	Dimensions
DDN1220	12V	20A / 20A	340W	181 × 148 × 52mm
DDN1230	12V	30A / 30A	500W	181 × 148 × 52mm
DDN1245	12V	45A / 45A	750W	181 × 148 × 67mm
DDN1260	12V	60A / 60A	1000W	181 × 148 × 67mm
DDN2430	24V	15A / 30A	1000W	181 × 148 × 52mm
DDN2460	24V	30A / 60A	2000W	181 × 148 × 67mm

Specifications

Charging
Alternator	12V (10.5–16V) or 24V (21–32V), including smart alternators
Solar input	10–60V open-circuit voltage
Efficiency	Up to 96% (DC-DC), 99.5% (MPPT)
Temperature compensation	−18mV/°C (12V, default)
Standby draw	Under 2mA

General
Communication	Bluetooth and CAN, plus a display port
Dry contact	1 programmable relay, 30V 1A
Display	5 LEDs
Cooling	Natural, no fan
Operating temperature	−40°C to 70°C (reduced output above 30°C)
Protection rating	IP40
Weight	1.5kg
Certifications	CE, E-Mark, SAA, FCC Part 15B