Overview

The Hella Marine 706729011 is a spare key for the Hella Marine 150A Battery Master Switch (2843 series), so you can still shut down or restore DC battery power if the original key goes missing.

It fits the keyed switch used to isolate your boat’s electrical system, and the key can be removed when the switch is in the OFF position so current is fully interrupted.

Keeping an extra key onboard is a simple way to avoid a no-start situation at the dock, and it also helps when you routinely remove the key to leave the battery switch OFF while the boat is unattended.

Key features

• Replacement key for Hella Marine Battery Master Switch series 2843 (150A keyed switch)
• Key-removable OFF position so the switch can stay fully disconnected without a key left in place
• Restores normal battery switch control if the primary key is lost or damaged
• No electrical work required since this is a mechanical key for the switch actuator
• Easy to store as a labeled spare in your onboard electrical spares kit

Compatibility and fit

This key is intended for the Hella Marine 150A Battery Master Switch in the 2843 series. Confirm your switch is the keyed version before ordering, since non-keyed battery switches use different knobs and hardware.

Installation and operation

There is no wiring or setup. Insert the key into the battery master switch and turn the switch ON or OFF as needed. When the switch is OFF, the key can be removed to leave the circuit disconnected.

As with any battery isolation switch, shut down high-draw DC loads and chargers before switching OFF to reduce arcing at the contacts and avoid nuisance resets onboard.

Use on board

This spare key is a good match for boats that use a keyed battery master switch as a regular shutdown point, especially when the switch is mounted in an engine room, cockpit locker, or battery compartment where keys can get misplaced.