... SSI-7KWInput rated voltage48VDC(range :42VDC to 55VDC)Battery typemaintenance free,lead acid battery ... , the battery is discharged and transferred to the bypass state ,(Pls note that the battey ... can’t charged at this time ), when the battery up to ... 55V from solar panel, go to the inverter state again .Unattended featuresIn the bypass state, ...