A utility spokeswoman said an illegal electrical hookup was involved.
The plant was back at about 25 percent power on Saturday and full power by Monday morning.
Utility regulators have announced $22 million in federally funded grants to help low-income state residents keep their lights on and their homes warm.
The building has been vacant since the Salvation Army closed it in 2004.
The state’s biggest utilities have been ordered, among other things, to make it easier for customers to get credits on bills when they suffer losses due to outages.
DTE Energy reports that 8,000 customers in the southeastern part of the state are still in the dark — that’s down from about 42,000 affected by the high winds that started Friday.
In the last five months, nearly 100 local small business customers have been robbed of thousands of dollars by crooks posing to be utility employees.
Crews continue to work 16-hour shifts around the clock to restore service, with about 40,000 in Wayne County, with the rest scattered throughout Oakland, Macomb and Washtenaw counties.
Ford executive chairman Bill Ford said the project reflects the automaker’s “long history of innovation and a deep commitment to sustainability.”
The competition was strong Wednesday for the Live Downtown Games including events like the hippity-hop, sack race and hula-hooping at DTE Headquarters in Detroit.