Description
The Ionnic BMS-21 and BMS-22 are marine-style battery switches for boats, caravans, motorhomes and dual-battery vehicles. The BMS-21 is a two-position Off–On isolator rated 200A continuous, and the BMS-22 is a four-position Off–1–1+2–2 selector rated 100A + 100A continuous. Both are rated 1000A intermittent for 12 and 24 volt systems.
The BMS-22 lets you run from battery 1, battery 2 or both in parallel, and switch between batteries without interrupting power to the loads. The BMS-21 also has a removable actuator. Contacts are tinned copper, the handle is PBT and the body thermoplastic.
Removable side panels make cable entry and access easy during installation. The BMS-21 has two 10mm studs and the BMS-22 three 8mm studs, and both mount with Ø 5mm fixing holes.
Key Benefits
- Single-battery isolator or dual-battery selector
- BMS-22 switches batteries without power interruption
- BMS-21 removable actuator
- Tinned copper contacts for marine environments
- Removable side panels for easy cable entry
Specifications
- Part numbers – BMS-21 (Off–On), BMS-22 (Off–1–1+2–2)
- Voltage – 12–24V DC
- Current rating – BMS-21 1000A intermittent / 200A continuous; BMS-22 1000A intermittent / 100A + 100A continuous
- Contacts – Tinned copper
- Handle – PBT
- Body – Thermoplastic
- Terminals – BMS-21 2 × 10mm studs; BMS-22 3 × 8mm studs
- Dimensions – 68 × 68mm face, Ø 5mm mounting holes
Applications
- Boats with single or dual battery banks
- Caravans, motorhomes and camper trailers
- 4WD dual-battery systems
- Auxiliary and house battery switching
