Operating voltage: 16 Vac, 40 VA, 50-60 HzAuxiliary Power Output: 13.8 Vdc when AC voltage present, 12.8 Vdc or 1V battery when battery powered, Disconnect at 9.5VBattery: 12 Vdc, 4 Ah to 14 AhCharging: 300 mA min to 1200 mA (redirect from auxiliary if less than 2.5A)Operating temperature: -20 to 50° CHumidity: 95% maximumBUS Monitoring: AC, Auxiliary PowerDimensions (HxWxD): 5.6 x 14 x 2.5 cmCertifications: CE, EN50131Compatibility: EVO192, EVOHD all versions, MG5000, MG5050, SP5500, SP6000, SP7000 V6.80 and above