... ) Protection grade: IP21, IP31 (Others available)K) Environmental limitsAmbient temperature:Storage: -40...+70° COperation: -15...+45° C, no ... Charger: DCS800, ABB Thyristor Power Converter (German ABB original).B) Storage battery: Sealed lead-acid battery, lead-acid battery, nickel-cadmium ... , monitoring devices for battery and insulation. CE Approved All-Digital DC Power Supply (DCB501D)