Perko Medium Duty Battery Disconnect Switch, 250A

The Perko Medium Duty Battery Disconnect Switch is a key-locking main shutoff rated 250A continuous and 360A intermittent, ignition protected.

The key lock is the feature here, and it serves security rather than safety. It prevents the main power being switched on by anyone without the key, which matters on a boat left at a public dock or a rental fleet vessel.

The trade is that the key has to be aboard and locatable in an emergency, since the switch cannot be turned without it. Keeping a spare somewhere findable is the sensible precaution, and it is the reason non-locking versions exist alongside these.

This is a disconnect rather than a selector, so it isolates one bank rather than choosing between two. Ignition-protected construction suits onboard installation across 12, 24 and 32 volt systems, with 250 amps continuous covering starting, house-bank and general marine work. Explore more battery switches.

• The key lock is security, not safety
• For a public dock or a rental fleet vessel
• The key must be aboard and findable in an emergency
• Keep a spare somewhere locatable