Victron Energy Battery Switch ON/OFF 275A SKU: VBS127010010

Victron's installation manual instructs installers to place the switch in the positive battery cable. One switch terminal connects to the battery-positive conductor, and the other connects to the positive conductor feeding the selected load circuit, alternator circuit, or second battery. Final switch location, fuse placement, and cable routing should follow the requirements of the complete RV, marine, vehicle, or off-grid system.

Yes. Victron states that the Battery Switch ON/OFF 275A is suitable for battery systems up to 48V. Its published maximum DC operating voltage is 60V, providing the required operating margin for correctly designed nominal 48V battery systems.

That depends on the inverter's maximum continuous DC input current, surge current, battery voltage, efficiency, cable length, ambient temperature, and system design. The switch is rated for 275A continuous DC current. Do not size it from inverter wattage alone; confirm the inverter manufacturer's DC-current requirements and apply the appropriate engineering and regulatory margins.

Victron publishes a 1,250A peak cranking rating for 10 seconds. Its current manual lists a 455A five-minute DC rating, while the separate product data sheet labels 455A as a one-minute rating. If your installation will operate near the short-duration limit, verify the latest Victron documentation with your dealer before finalizing the design.

The switch uses M10 terminal studs, also identified by Victron as approximately 3/8 inch / 9.53mm. Use correctly sized, high-quality lugs, install the supplied hardware correctly, and tighten the terminal nuts to Victron's recommended 8N·m torque. The manual lists 12.5N·m as the maximum torque.

Victron's manual specifies 120mm² / 4/0 AWG cable on all switch terminals to meet the full published current rating. A lower-current installation may use a different engineered conductor size, but cable ampacity, insulation temperature rating, run length, voltage drop, termination quality, and applicable codes must all be considered.

Yes. Rotate the switch to OFF, then turn it a further 30 degrees to the Remove position and pull the knob out. With the knob removed, the switch remains off. Victron identifies this as useful during maintenance or when an unattended system should not be switched on accidentally.

Yes. The Battery Switch can be surface mounted or rear-panel mounted for a cleaner panel-style installation. Victron includes a mounting template and four mounting screws. Check the official dimension drawing and the panel thickness requirements before cutting the opening.

Victron states that the switch is suitable for switching under load. However, if alternators, motors, or sensitive DC loads are connected, Victron instructs users to turn those devices off before disconnecting the DC supply. This reduces arcing and protects connected equipment.

No. The Victron battery switch is a manual isolation device; it does not automatically open during an overcurrent or short circuit. The battery circuit still requires correctly rated overcurrent protection, such as an appropriate fuse or breaker, installed according to the battery, conductor, equipment, and code requirements.

It can isolate the loads and charge sources routed through the switch, helping preserve battery charge during unattended storage. Any device wired directly to the battery and bypassing the switch will remain energized, so the complete wiring diagram must be reviewed before relying on the switch as the system's master disconnect.

Yes. Victron lists ISO 8846 / SAE J1171 ignition protection and states that the switch is suitable for use in an engine room. Ignition protection does not replace proper system design, enclosure placement, cable protection, ventilation, or compliance with applicable marine standards.