In order to meet the Renewable Energy Portfolio Standards, Michigan's Electrical Utility Companies are starting to solicit offers to buy your 'Renewable Energy Credits'. So now you get 30% Federal Tax Credits, lower material costs because of increased production, offset higher electric rates (just went up 20% last month) and now you are able to sell the credit to the utility company. Here is a paragraph from 'Energy Tidbits',
Consumers
Energy Company is requesting proposals for up to 17.4 MW and 130,000
MWh of renewable capacity, energy and renewable energy credits from
small scale renewable energy systems (less than 5 MW of nameplate
capacity), located within the Consumers Energy service area. This
request is intended to fulfill a portion of the Company’s renewable
energy requirements specified in Public Act 295. All interested
respondents are requested to submit a Notice of Intent no later than
Feb. 5. Proposals are to be submitted no later than March 2.
Consumers Energy intends to issue a second request for proposals in
March for approximately 600,000 MWh per year of energy, capacity (250
MW) and RECs from additional smaller and larger scale
systems.
http://www.consumersenergy.com/estavlpwr.nsf/RFPs?OpenView