Description
The Victron Energy Battery Isolator Switch is a heavy-duty mechanical disconnect rated at 275A continuous. It physically isolates batteries from the electrical system for safety, maintenance, or seasonal storage. Surface or panel mountable, it works with any DC voltage and battery chemistry — making it a universal safety component for marine, RV, and off-grid installations. Available in red and black versions for positive/negative terminal identification.
Key Features
- ✓ 275A continuous rating handles high-current systems including trolling motors, inverters, and multi-battery banks.
- ✓ Purely mechanical operation — no electronics to fail, no firmware to update, no parasitic draw when off.
- ✓ Surface or panel mount flexibility fits battery compartments, engine bays, and electrical panels.
- ✓ Voltage & chemistry agnostic — works with LiFePO4, AGM, lead-acid, and any DC voltage system.
Technical Specifications
| Product | Victron Energy Battery Switch On/Off 275A |
|---|---|
| Continuous Rating | 275A |
| Voltage | Any DC voltage (universal) |
| Operation | Manual on/off lever |
| Contacts | Single pole, single throw (SPST) |
| Mounting | Surface or panel mount |
| Colors | Red and black versions available |
| Warranty | 5 years (Victron standard) |
Applications
- Marine battery disconnect — required by ABYC standards in many jurisdictions
- RV house bank isolation for maintenance or storage
- Emergency power cutoff for safety
- Seasonal storage disconnect to prevent parasitic drain
- Dual battery systems — isolate house bank independently from starter
FAQ
Do I need a battery isolator switch with LiFePO4 batteries?
Yes. While LiFePO4 batteries have built-in BMS protection, a mechanical disconnect provides an additional layer of safety. It allows you to physically cut power for maintenance, wiring changes, or emergency situations — something the BMS alone cannot do. Many marine and RV codes require a manual disconnect regardless of battery chemistry.
What size wiring do I need for a 275A switch?
For the full 275A rating, use 4/0 AWG cable or larger. Most installations draw well under 275A — size your cable to the actual system draw and fuse rating rather than the switch maximum. Always install an appropriate fuse between the battery and switch.
Can I use this as a dual battery switch?
This is a simple on/off switch — one circuit, one position. For dual battery switching (1/2/Both/Off), you need a dedicated dual battery selector switch. Use this switch when you need a straightforward disconnect for a single battery bank.
Warranty & Support
Backed by Victron Energy’s 5-year standard warranty. Victron is the industry standard for marine and off-grid power components, with global dealer support and proven reliability across millions of installations.
