An unlikely location in the Midwest is setting up to be a locus of solar activity: Detroit, Michigan, former world auto industry capital as famed for its Model-Ts as it was for its smoke-belching factories, is also at the center of a pilot solar incentive program offered by utility company DTE Energy Co. through its subsidiary Detroit Edison. With Michigan shooting for a Renewable Portfolio Standard (RPS) of 10 percent by 2015, however, the pressure is on for utilities to deliver—and DTE has stepped up to the plate. SolarCurrents, as the $25 million Detroit Edison program is called, provides rebates of $2.40/watt—or, $2,400 per kilowatt—of installed solar capacity, a lucrative rebate that could set off the price of a 5 kW system by a hefty $12,000. It applies to solar photovoltaic systems between 1 kW and 20 kW in installed capacity, and the program will accommodate only up to 5 MW of installations, so get your foot in the door while you can.

Below, we’ve provided a breakdown of how you might get from the pre-incentive solar quote you would receive to the post-incentive price you would ultimately pay for a solar system.

To be on the conservative side, let’s say we have a 5 kW system that costs $40,000, pre-incentives. (Unless you’re in an especially aggressive, competitive region for solar, most installers will quote you $7.50 to $8 per watt for a non-utility-scale solar photovoltaic system, before incentives. If you’ve experienced differently, please let us know!) Here’s how we would calculate the potential rebates:

  • Starting price: 5,000 x $8 = $40,000
  • Renewable Energy Credit (REC) Repayment: $2.40/watt x 50,000 watts = $12,000
  • Federal renewable energy tax credit, usually calculated as 30 percent of gross: $40,000 x 0.30 = $12,000
  • You pay: $40,000 – (2 x $12,000) = $16,000

This figure is of course hypothetical, and your actual net cost would be even lower than this, thanks to Detroit Edison’s ongoing $0.11/kWh repayment for the actual power your system generates, which will appear as a credit on your monthly electric bill for the next 20 years. Still, the above figures are just to give you an idea of what to expect—for a more detailed quote, be sure to find a qualified solar professional. Transparency is key–especially when regarding an investment as important as solar.