DC to DC Battery Charger, 520W 40A MPPT Solar

This DC to DC battery charger combines solar and alternator inputs to charge auxiliary batteries at up to 520W and 40A output. Built-in MPPT technology prioritises solar power, reducing alternator load while maximising charging efficiency to 94%.

Supports multiple battery chemistries including LiFePO4, lead-acid, AGM, GEL, and calcium. Dual-voltage design handles 12V to 12V, 12V to 24V, 24V to 12V, and 24V to 24V configurations via DIP switch selection, making it suitable for RVs, caravans, trucks, off-grid systems, and home backup setups.

Emergency reverse-charging mode draws from your auxiliary battery if the starter battery depletes, so you can get back on the road without roadside assistance. Compatible with over 95% of portable power stations.

Protection features include overvoltage, undervoltage, reverse polarity, over-temperature, and short-circuit safeguards. Integrated cooling fan maintains safe operating temperatures during extended use.

Select your input and output voltage configuration using the supplied DIP switch keys, then connect your solar panels and alternator inputs.