Eaton BR 125A 8-Space 16-Circuit Indoor Main Lug Loadcenter with Surface Door for Critical Loads or Small Main Panel
SKU: BRP125
Product Summary
The Eaton BR 125A loadcenter is an 8-space, 16-circuit main lug panel commonly used as a critical loads subpanel for inverter-backed circuits or as a small branch panel for garages, workshops, and additions. Accepts Eaton BR-type breakers (sold separately), rated for 120/240V at up to 125A.
Specifications:
- 8 spaces, 16 circuits, 125A main lug (no main breaker)
- 120/240V single phase, 10 kAIC interrupt rating
- Tin-plated aluminum bus with steel backpan
- Accepts Eaton BR-type breakers (sold separately)
- Wire size: #14 to 1/0 AWG Cu/Al
- NEMA 1 indoor rated with surface mount door
- Weight: 12 lbs
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About the Eaton BR 125A 8-Space Loadcenter
The Eaton BRP125 is a 125A main lug loadcenter with 8 breaker spaces and 16 circuits. As a main lug panel (no main breaker), it's fed from an upstream breaker in your main panel or directly from an inverter's AC output. This is the panel you'd use as a critical loads subpanel in a solar or battery backup system, where you move essential circuits like refrigerators, lighting, well pumps, and communication equipment onto a dedicated panel that stays powered during an outage.
Common Uses in Solar and Battery Systems
In a typical grid-tied battery backup system, the inverter's output feeds this panel, and you move the circuits you want backed up onto it. During normal operation, everything runs off the grid through the inverter. During an outage, the inverter switches to battery and only the circuits on this panel stay energized. Eight spaces is enough for most critical loads subpanel configurations in a residential system.
This panel also works as a conventional subpanel for garages, workshops, sheds, and home additions where you need a few branch circuits fed from the main panel.
Breaker Compatibility
This loadcenter accepts Eaton BR-type plug-on breakers in single pole (120V) and double pole (240V) configurations. Single pole breakers occupy one space each. Double pole breakers occupy two spaces but serve one 240V circuit. With tandem BR breakers (where compatible), you can fit two single-pole circuits in one space, which is how the panel reaches 16 circuits in 8 spaces. Breakers are sold separately.
Construction
The steel backpan provides solid breaker mounting with a single-piece design. The bus is tin-plated aluminum. Pre-scored knockouts on the top, bottom, and sides accommodate standard conduit and cable entries. A single keyhole at the top simplifies mounting and leveling, and a drywall marking on the enclosure indicates proper depth for flush-mount installations. The included surface mount door covers the breaker faces while leaving the circuit directory accessible.
Recommended Accessories
Frequently Asked Questions
A main lug panel has no main breaker inside it. The incoming feed wires land directly on the bus lugs. Overcurrent protection for this panel comes from the breaker feeding it in the upstream main panel, or from the inverter's internal overcurrent protection. This is the standard configuration for subpanels and critical loads panels.
No. The panel ships empty. You need Eaton BR-type breakers, available in single pole (15A to 50A) and double pole (15A to 125A) configurations depending on your circuits.
8 spaces with support for up to 16 circuits using tandem BR breakers in compatible positions. For most critical loads subpanel setups, 8 single-pole spaces covers refrigerator, lighting, a few outlets, networking equipment, and a well pump or sump pump circuit.
No. This panel is NEMA 1 rated for indoor use only. For outdoor critical loads panels, you'll need a NEMA 3R rated enclosure.
The main lugs accept #14 to 1/0 AWG copper or aluminum conductors at 60°C or 75°C ratings. Size your feeder wire based on the breaker feeding this panel from upstream and your local code requirements.
This is commonly used as a critical loads subpanel for inverters that don't have a full 200A pass-through. If your inverter has a dedicated loads output (like the EG4 6000XP or 12000XP), this panel connects to that output and houses the circuits you want backed up. For inverters with 200A pass-through like the Sol-Ark 18K-2P, a critical loads subpanel is optional since the inverter can back up the entire main panel.
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