This reports the summed DC current, in units of 0.1A, being drawn by every module assigned to this DC group from their shared battery string or DC branch, the group-level aggregate of each module's tsiModuleIinDC. For estimating that specific battery string's remaining runtime during an outage, knowing the exact aggregate current draw on that string, rather than guessing from total site load, lets an admin calculate a much more accurate time-to-depletion for that particular string. An admin managing an extended outage would combine this current reading with the known amp-hour rating of that specific battery string to estimate exactly how long that string will last under its current group's load.