Charging a Caravan Lithium Battery - DC-DC, Solar and Mains

Intro
Correct charging is the key to reliable LiFePO4 performance. Use matched chargers and cables, and your system will recharge quickly and safely.

DC-DC Charging From Your Tow Vehicle

• Why DC-DC - stabilises alternator output and provides a proper lithium profile.
• Location - mount close to the caravan battery to reduce voltage drop.
• Cabling - size cables for the charger’s full current over the full run.

Solar With MPPT

• MPPT regulator tuned for lithium improves harvest.
• Fixed roof + portable - combine for shade resilience at camp.
• Wiring - keep panel-to-regulator and regulator-to-battery runs appropriately sized.

240V Mains Charger

• Use a charger with a lithium mode and correct current for your battery bank.
• Follow the manufacturer’s instructions and relevant electrical standards.

General Tips

• Use correct fusing near the power source and at distribution points.
• Keep cable runs short and terminations clean and tight.
• Confirm charger settings after any firmware updates or resets.

Bottom line
Match DC-DC, MPPT and mains chargers to LiFePO4 settings, size cables correctly, and you will recharge quickly on and off the road.

See caravan lithium batteries compatible with DC-DC and MPPT charging