Marine Battery Isolator/Changeover Switch - 4 Positions - 100A Cont.

  (4 Reviews)
Price:  £27.48   (£22.90 Exc. VAT)

Product code:  P01490
Current Rating  100A
Number of positions  4



1 in stock

4 position (1 ON / 2 ON / 1+2 ON / OFF), single pole marine battery isolator / changeover (master) switch rated at 100A continuous use. Features a chunky control knob with a positive switching action.

Used for switching between, or combining, two independent battery banks in charging and discharging applications and for isolation from loads or a charging source. Also useful for preventing parasitic battery drain when left for long periods or as an emergency shut-off in boats and vehicles.

Surface-mounted with slide-out cable entry panels.

Sold individually. Fixings not included.

Note: If this switch is used to isolate a starter battery it should not be switched to the OFF position when the engine is running (except in an emergency situation) because there is a high risk of damage to the diodes in the alternator rectifier unit.

  • Max. continuous operating current: 100A
  • Max. peak current: 1000A for 5secs
  • Max. voltage: 48V DC
  • Terminal stud size: M8 x 15mm
  • Fixing hole pitch: 55.4mm
  • Fixing hole dia: 5.3mm
  • Overall dims: 69 (L) x 69 (W) x 74 (D) mm

Part Number:  BIS1027

Average Rating (4 Reviews):  
Write a Review and share your opinions!

Good service
16 October 2023  | 

Good service from 12VPlanet. Switch used to give more control to two yacht batteries.


Thank you for the positive feedback!

Good value
04 January 2021  | 

All as advertised, would use again

Easy to install changeover
10 September 2019  | 

Used to switch between leisure batteries and power distribution board. Works well in an awkward position.

Solid product but problrems in connecting up
27 October 2016  | 

The isolator is a compact footprint, and seems robust. I have not run final commissioning and life tests on the DC to AC unit I have used it in yet but....
During assembly the triangular internal contact came loose and jammed the switch. Panic - I was putting the DC to AC power unit fout for its first filed test the next day! So I disassembled the switch and reassembled it correctly and all is fine now. It was lucky that I had a square headed screw driver from when I lived in Canada though!

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