Battery Backup Systems (BBS) — full BBS packages for signalized intersections

When utility power drops or fails, an automatic transfer switch instantly routes power from onboard batteries through the UPS module to the traffic cabinet, maintaining continuous signal operation. Once utility power is restored, the system automatically recharges the batteries and returns to normal AC operation.

A complete BBS package typically includes a Type 3R rated outdoor enclosure, a UPS module such as Alpha's FXM HP series, an automatic transfer switch, specialty batteries like AlphaCell, and a battery management system such as AlphaGuard for monitoring and balancing.

Runtime depends on the UPS module wattage, number of batteries installed (up to four AlphaCell batteries), and cabinet load. Configurations can typically sustain intersection operation from several hours up to over 24 hours, with generator transfer options available for extended outages.

Yes. BBS enclosures such as Alpha's 0.125-inch aluminum units are Type 3R rated, meeting NEMA/UL standards for protection against rain, ice, and other outdoor elements, ensuring reliable performance in harsh roadside environments year-round.

Yes. Systems equipped with AlphaGuard or the Remote Battery Monitoring System (RBMS) Plus allow agencies to remotely track battery voltage, temperature, and charge status, reducing unnecessary truck rolls and enabling proactive, condition-based maintenance.

Alpha BBS solutions are compatible with NEMA M, P, and 336 traffic controller cabinets, as well as Advanced Transportation Controller (ATC) cabinets, making them suitable for most existing signalized intersection installations without requiring cabinet replacement.