Step one: Use this calculator to determine how many solar blocks you'd like to purchase.

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  2. 1

    Customer type

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  3. 2

    How renewable do you want to be?  You can purchase solar blocks up to 100% of your usage.

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  4. 3

    What was your usage (kWh) for the last 12 months?

    Tip: To find your 12-month kWh usage, visit My Account. Your 12-month usage must equal or exceed 441 kWh in order to participate. Click for instructions on accessing this information.

Step two: Fill out this form to reserve your blocks.

You’ll need the following information to complete the subscription form:

1) The number of solar blocks needed based on your home’s electric usage for the last 12 months. To determine this, please use the calculator above.

2) Alliant Energy account number for the main address you wish to have the credits applied. To find your account number, visit My Account or refer to your Alliant Energy electric bill.

Subscription information

To determine this, please use the calculator above.

Payment options


Bill credits will begin when the facility generates energy and your subscription is paid in full. Bill credits will continue for 20 years.

Full payment: Includes payment of blocks and a $25 non-refundable administration fee (billed separately).

Monthly payment: The first month’s bill will include 10% of the full subscription fee and a $25 non-refundable administration fee. The remainder will be divided into 11 monthly payments.

Review terms and conditions