EXCELFU Generator Interlock Kit for Eaton BR Series 150–200 Amp Panels

Safe, code-friendly backfeeding for outages

When the power grid goes dark, a portable generator can provide essential light and warmth. The EXCELFU Generator Interlock Kit offers a safer way to backfeed your home by coordinating the main breaker and the generator’s branch breaker inside an Eaton/Cutler Hammer panel. By design, the interlock prevents both breakers from being on at the same time, reducing the risk of backfeed to utility workers and potential equipment damage. The result is a practical backup power approach you can implement with confidence, without the need for a separate generator panel.

The interlock unit is built as a compact metal plate paired with three bolts. When you flip the plate to the down position, it blocks the generator backfeed path while allowing the main breaker to stay live. Flipping up enables generator backfeed only after the main breaker is secured off. The control feel is tangible and straightforward, making it easier to follow the intended sequence during setup and during occasional generator use.

Compatibility and system fit

The kit is compatible with Eaton/Cutler Hammer BR Series panels (with plug-in neutral) and CH-series panels with plug-in neutral, for 150 and 200 amp services. It is designed to install inside your existing main panel, so you don’t need a separate generator panel. The spacing between the main breaker and the branch breakers is specified at 1-1/4 to 1-7/16 inches, which aligns with common BR/CH layouts.

What’s included

• Interlock plate
• Shoulder screws
• Hex nuts
• Drill bit
• Generator startup procedure label
• Reminder labels
• Zip ties
• Instruction manual

Key benefits in real life

• Safe backfeeding: helps coordinate the main and generator breakers to reduce backfeed risks.
• Easy to install: a ready-to-use package with all fasteners and guides included.
• Compact, panel-friendly design: fits inside the existing Eaton BR/CH panels without a separate box.
• Clear guidance: startup and reminder labels provide quick reference for safe operation.

Design and materials emphasize durability and simplicity. The interlock mechanism uses a metal plate and robust hardware to support repeated use during outages or emergency drills. You’ll appreciate the clean installation, tidy wiring, and decisive feedback when you operate the lever. Consider this kit as part of a thoughtful approach to backup power that keeps essential circuits accessible while maintaining safe separation between the main power and the generator source. As with any electrical work, consult your local codes or a licensed professional if you’re unsure about installation in your specific home panel.

Installation tips

• Maintain the specified spacing: 1-1/4 to 1-7/16 inches between the main and branch breakers for proper operation.
• Use the included startup and reminder labels to guide first use and ongoing safety reminders.
• Keep the included drill bit and hardware with your panel kit for future maintenance.