BEP — EZ-Mount 1-2-Both-Off Battery Selector Switch, 400 A — BEP-771-S-EZ-B

BEP EZ-Mount 1-2-Both-Off Battery Selector Switch, 400 A (771-S-EZ-B)

This BEP 771-S-EZ-B is a 1-2-Both-Off battery selector switch in the EZ-Mount format, rated 400 A continuous for 12 to 48 V systems. It meets UL1107, CE, and ABYC requirements, is ignition protected and IP66 rated, and its removable switch knobs and side plates make servicing straightforward.

Part Details

• Brand: BEP
• Manufacturer part number: 771-S-EZ-B
• Product type: EZ-Mount battery selector switch
• Switch positions: 1-2-Both-Off
• Voltage: 48 V DC (for 12-48 V systems)
• Current ratings: 400 A continuous, 600 A intermittent, 1500 A cranking
• Certifications: Meets UL1107, CE, and ABYC; ignition protected; IP66 rated
• Dimensions: 3.85" x 3.85" x 3.62" (98 x 98 x 92 mm)
• Mounting: Surface mount only
• Sold as: each (pack of 12)

Key Features

• 1-2-Both-Off selector for two battery banks
• Rated 400 A continuous, 600 A intermittent, and 1500 A cranking
• For 12-48 V systems, 48 V DC maximum
• Meets UL1107, CE, and ABYC; ignition protected
• IP66 rated
• Removable side plates and ergonomic removable switch knobs
• Industry standard 3.85" x 3.85" footprint, surface mount only

Compatible Applications

• Two-battery systems that need a 1-2-Both-Off selector
• DC systems from 12 to 48 V

Technical FAQ

• What positions does the switch offer? 1-2-Both-Off: battery 1, battery 2, both banks combined, or off.
• What systems is it rated for? 12 to 48 V DC systems, with a 400 A continuous, 600 A intermittent, and 1500 A cranking rating.
• Is it ignition protected? Yes, it is ignition protected and also IP66 rated.

Also Available

• BEP — EZ-Mount Double Pole On-Off Battery Switch, 400 A — BEP-770-DP-EZ — the double pole On/Off EZ-Mount switch from the same family, used to isolate both battery terminals.
• BEP Heavy Duty Battery Selector Switch 720 On/Off 2-Poles (BEP 720) — a heavy duty two-pole On/Off switch from the same brand.
• BEP Pro Installer Busbars - Busbar HD 8 Stud 650A | 777-BB8S-650 — a Pro Installer busbar from the range the EZ-Mount switches cluster with.

Parts Desk Insights

• Best use case: Selecting between two battery banks, combining them, or switching everything off, on 12 to 48 V DC systems that need a high-current selector.
• Most common customer mistake: Ordering a selector when the installation needs double pole isolation, or the other way around. A 1-2-Both-Off selector switches the positive side between banks, while a double pole switch isolates both terminals, so confirm which behaviour the system needs before ordering.
• Sizing and fitment guidance: Plan for the 3.85" x 3.85" footprint and surface mounting, confirm the system voltage falls within the 12-48 V range, and check the continuous, intermittent, and cranking ratings against the bank's loads. See the Also Available section for the double pole On/Off version.