This is a 125 amp AC breaker built for the EG4 BSB Series distribution setup used with the FlexBoss inverter. If you're wiring or servicing a FlexBoss AC panel, this breaker gives you the disconnect and overcurrent protection point the system calls for.
Breakers in an AC distribution path are one of the few components you cannot substitute casually — the trip rating has to match the conductor and load it protects. EG4 built the BSB Series breaker lineup specifically for FlexBoss inverter installations, which is why the amperage and mounting profile line up with that panel's design.
Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
Critical Fitment & Requirements
- Amperage rating: 125A.
- Series: BSB Series, built for use with the EG4 FlexBoss inverter distribution setup.
- NOT confirmed for use with non-EG4 inverter brands or panels outside the BSB Series — do not substitute without verifying trip rating and physical mounting fit.
- Wire gauge, terminal lug size, and voltage rating are not specified in available manufacturer data. [NEEDS VERIFICATION]
A breaker that's undersized or oversized for the actual conductor ampacity is a common cause of nuisance trips or, worse, an overheated conductor that never trips when it should. Before you land this 125A breaker into a FlexBoss AC circuit, confirm the upstream and downstream conductor ampacity matches a 125A rating per NEC Table 310.16, and torque every lug connection to the panel manufacturer's spec using a digital torque wrench — a loose lug on a breaker terminal is a common source of localized heating and eventual thermal failure at that connection point.
Key Benefits
- Matched amperage rating (125A) for FlexBoss BSB Series AC distribution circuits.
- Purpose-built for the BSB Series panel footprint — no adapter or retrofit guesswork.
- Straightforward drop-in replacement or new-install breaker for FlexBoss-based systems.
| Spec | Value | Unit |
|---|---|---|
| Ampacity | 125 | A |
| Series | BSB Series | — |
| SKU | EG4BREAKER125A | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Fits: EG4 FlexBoss inverter systems using the BSB Series AC distribution panel.
- Does NOT have confirmed compatibility with other inverter brands, other EG4 panel series, or non-BSB distribution hardware — verify before ordering. [NEEDS VERIFICATION]
Compliance & Environment
| Item | Status |
|---|---|
| UL Listing | [NEEDS VERIFICATION] |
| NEC Ampacity Reference | Match conductor sizing to 125A rating per NEC 310.16 |
| IP Rating | [NEEDS VERIFICATION] |
FAQ
What is the amperage rating of this breaker?
This breaker is rated at 125 amps.
Does this breaker fit the FlexBoss inverter system?
Yes. It is designed for the EG4 BSB Series used with the FlexBoss inverter.
Will this breaker work with other inverter brands or panel series?
Compatibility with other brands or panel series is not confirmed. [NEEDS VERIFICATION]
What voltage rating does this breaker carry?
Voltage rating is not specified in available data. [NEEDS VERIFICATION]
Warranty & Registration
Manufacturer warranty terms for this breaker are not included in the provided data. Refer to the "Resources (System Manuals and Warranty)" Tab above on this page for the manufacturer's warranty document and registration steps. If you can't find what you need there, ask us before you order — we always reply back.
