Overview

The Blue Sea Systems 1139 is a square blank panel for mounting an M-Series battery switch in a DC electrical panel layout. Its face measures 4.88 in. wide by 4.75 in. high, which makes it a straightforward match for installations built around the Blue Sea M-Series switch footprint.

This panel is useful when you are building a battery switch station from separate parts or replacing a worn panel face without changing the rest of the setup. It gives the switch opening a clean finished look and keeps the battery management area more orderly at the helm, inside a console, or in an electrical locker.

This is the panel only and does not include the switch. That makes it a practical choice for refits where the switch and cabling are being selected separately to suit the boat.

Key features

• Made for Blue Sea Systems M-Series battery switch mounting applications
• Square panel format with a 4.88 in. x 4.75 in. face size
• Useful for new panel builds, replacement work, or matching an existing M-Series layout
• Black panel finish works well with modern DC switch and battery management panels
• Panel-only configuration lets you pair it with the specific M-Series switch needed for the boat

Compatibility and fit

This panel suits installations that use a Blue Sea M-Series battery switch and need the correct square mounting face. Before ordering, check that your switch is part of the M-Series range and confirm there is enough flat mounting space for the panel dimensions.

It is a good match for owners replacing a damaged or weathered panel face, and for builders putting together a custom battery switching station where the mounting panel and switch are purchased separately.

Installation and setup

On most boats, a panel like this is fitted where the battery switch needs to stay accessible for normal operation and emergency isolation, while still being protected from accidental knocks. Common mounting spots include inside a center console, near the main DC distribution area, or in a service compartment close to the battery bank.

Because this part is only the panel, the rest of the installation can be planned around the boat's cable routing, switch selection, and access requirements without forcing a preconfigured assembly.

What’s included

• One square blank panel for M-Series battery switch mounting