Victron 18A 12V DC-DC Isolated Battery-to-Battery Charger | 4Boats

Compact, galvanically isolated 18 A DC-to-DC charger for charging a second 12 V battery bank from a primary 12 V source; suitable for 12 V lead‑acid or lithium batteries and with Bluetooth monitoring.

• Function: automatically charge one 12 V battery/bank from another 12 V battery/bank (for example engine starter to leisure battery) and provide isolated DC conversion for sensitive loads.
• Bluetooth connectivity: inbuilt Bluetooth allows monitoring and configuration with the VictronConnect app without accessing the installation location.
• Safe unattended charging: inbuilt protection against overload, overheating, overvoltage, short circuit and reverse polarity.
• Continued charging during battery/load use: the charger will continue to operate at full power while energy is drawn from the target battery; also offers DC conversion mode for stable, low‑noise output.
• Compatible with other charging sources: suppression filter permits concurrent charging from alternator, solar or mains; remote on/off via hard‑wired switch, external relay or VictronConnect.
• Vehicle battery optimisation and system upgrade potential: designed for efficient vehicle charging and may be connected in parallel with identical units to boost charging capacity for future expansion.
• Galvanic isolation: input, output and case are isolated from each other up to 200 Vdc to prevent galvanic currents through metal hulls; additional features include LED indicators for charging stage/status.
• Specifications: Input voltage 8–17 V; output current 0–18 A; battery types suitable for 12 V lead‑acid or lithium; under‑voltage shutdown 7.0 V, restart 7.5 V; output voltage adjustable 10–15 V (12.2 V nominal); output tolerance ±0.2 V; output noise 2 mV RMS; max power 280W; no‑load consumption: see datasheet; standby

Suitable for marine, vehicle and off‑grid systems; consult the datasheet and installation manual for cable sizing, mounting and compatible battery settings before installation.