Dual Battery & DC-DC Chargers
In-vehicle DC-DC chargers that charge your auxiliary battery from the alternator and solar while you drive. REDARC, Victron and Hardkorr, plus install kits — all in stock.
We design and fit complete dual-battery and DC-DC systems for 4WDs, utes, canopies and caravans — cabling, fusing and mounting done right.
Charge while you drive
A DC-DC charger takes alternator power and correctly charges your second (lithium or AGM) battery — safely and fully.
Add solar
Many DC-DC units have a built-in MPPT solar input, so your panels and alternator work together.
Size the amps
25A suits most single-battery setups; step up to 40A+ for larger lithium banks or faster charging.
Fitted right
Cable size, fusing and mounting matter. We supply kits or fit the whole system for you.
Tell us your vehicle and battery — we'll match the right DC-DC charger and kit, or fit it for you.