Compact, smart charging for vehicles, vans, and boats
Overview
The Renogy 12V 40A DC-to-DC Charger (2nd generation DCC) delivers efficient, controlled charging for a separate service battery while protecting your starter battery. It supports traditional and smart alternators/generators, offers remote monitoring via Bluetooth and the Renogy apps, and adapts charging behavior in high temperatures for safer operation.
Benefits
Keep your starter battery safe automatically so your vehicle starts reliably.
Monitor and adjust charging from your phone to avoid surprises on the road.
Extend service battery life by using temperature-aware and lithium activation controls.
Install in tight or humid spaces thanks to a compact, corrosion-resistant design.
Reduce cabin noise with a quiet cooling solution for a more comfortable ride or cabin.
Features
12V DC-to-DC charging with up to 40A output for dedicated service batteries.
Up to 94% charging efficiency under optimal conditions.
Alternator running detection to safeguard the starter battery.
BT-2 Bluetooth compatibility for remote monitoring and control via Renogy apps (DC Home / Core).
365-day data logging available through the Bluetooth/app connection.
Li battery activation On/Off to enable or disable lithium activation based on battery status.
Advanced charging logic with four-stage charging: bulk, constant voltage, float, and equalization.
Automatic output reduction in high-temperature environments for safe, continuous operation.
Includes a battery temperature sensor to adjust charging for optimal battery health.
Compact, corrosion-resistant enclosure suitable for small cabins and marine environments.
Natural heat dissipation and quiet cooling design (approx. 30 dB noise level).
Custom charging mode and compatibility with common 12V battery types (AGM, Flooded, GEL, Sealed lead-acid).
