When replacing a battery busbar, matching the original connection pattern can be as important as matching the number of cables. BEP's Pro Installer family includes high-current four-, five- and eight-stud bars, plus a 777-Z10W-200 Z-Bar with two separate electrical rails. This page helps identify which arrangement is present and where to find the exact replacement part.
What the connection pattern tells you
On the 777-BB4S-500, BB5S-650 and BB8S-650 models, the stud positions connect through one shared copper conductor. The 777-Z10W-200 is different: its ten positions are distributed across two separate rails. It must not be mistaken for a single ten-way common busbar.
4 stud points on a common conductive bar. Original concept only, not to scale.
5 stud points on a common conductive bar. Original concept only, not to scale.
8 stud points on a common conductive bar. Original concept only, not to scale.
Two separate conductor rails for a total of 10 positions. Original concept only, not to scale.
Compare the four BEP Pro Installer models
| Part number | Connection count | Terminal type | Electrical rating |
|---|---|---|---|
| 777-BB4S-500 | 4 studs | 8 mm (5/16 in) | 500A at 50V DC |
| 777-BB5S-650 | 5 studs | 10 mm (3/8 in) | 650A at 50V DC |
| 777-BB8S-650 | 8 studs | 10 mm (3/8 in) | 650A at 50V DC |
| 777-Z10W-200 | 10 positions, two rails | Two separate stacked rails | 200A per rail at 50V DC |
The conventional BB4S, BB5S and BB8S designs use copper conductors with stainless-steel studs. The Z10W uses a compact two-rail Z-style arrangement. These configurations serve different wiring layouts, so compare the part number and connections on the installed unit rather than ordering by current rating alone.
Find the matching BEP busbar product
Use the catalog photographs to compare the physical unit, then open the exact listing for its current condition and availability. UsedRVParts offers viewing and pickup by appointment in Kelowna where applicable.
Check BEP's original dimensioned drawings
The BEP Pro Installer electrical specifications identify each part number's current rating and stud arrangement. The adjacent manufacturer footprint drawings give its modular layout and connection form. Use the correct manufacturer's drawing for lug clearances, installation hardware, accessories and mounting measurements.