There are really many more answers needed than questions. Assuming you plan then to be all electric, including geothermal back up heat, water heater, appliances etc. Depending on the size of your home, its exposure any passive solar and on and on, depends on how many batteries you'd need to "hold on to" your solar electricity. The mid-west can have a lot of dark days and long nights in winter. There are solar specialists that can do a load calculation for you based upon your plans, electrical selections (appliances etc.) and your geography. It would be best to start there.