Renogy 12V 20A DC to DC On-Board Battery Charger - Reliable Charging for Vehicles & RVs

Empower Your Journey on the Go Maximize charging efficiency on the go with enhanced versatility. Seamless Charging, Ultimate Safety Isolated input/output with multifunctional safety technology for error-free and secure house battery charging. Protect Your Starter Battery Renogy's DC-DC battery charger works seamlessly with traditional and smart alternators. The included D+ Ignition cable identifies generator starts, safeguarding the starting battery from over-discharge and protecting the generator. (Recommended: 18-16AWG copper cable. D+ Ignition Cable not included.) Smart 3-Stage Charging   Efficiently charge your house batteries from the starter battery with Bulk, Boost, and Float stages, ensuring automatic and optimal charging up to 100%. Prolong Battery Lifespan   Automatically adapts charging modes to match battery voltages, while the temperature sensor provides -3mV/°C/2V compensation, ensuring optimal charging in varying temperatures. (Please not