Our BBS is specifically designed for the needs of transportation professionals. The EXELTECH Battery Backup System will provide necessary power to maintain LED equipped intersections during a utility failure. BBS INTEGRATED INVERTER/CHARGER SYSTEM - 1KW true sinewave power - CALTRANS compliant - ANSI-C62.41 Level B2 - Maintenance bypass switch - Power factor corrected charger - 3 state charger, temperature compensated - Power Transfer Switch less than 10 milliseconds, optional high speed relay ( < 5ms) - RS-232 interface - Temperature range from -37 C to 74 C - Low battery shutdown protection