Alliant Energy (WP&L) solar export rate
What Alliant Energy (WP&L) pays for power exported from rooftop solar in Wisconsin, with the source and the date it was checked.
Fixed export rate
$0.04254/kWh average as of 2026-01-01 for PgS-3 net overgeneration
Alliant Energy (WP&L) · Wisconsin
PgS-3 applies to systems 20 kW AC or less; net overgeneration at the end of the billing cycle is cashed out at the tariff pricing-period rate.
Source: alliantenergy.com
Full Alliant Energy (WP&L) detail →Wisconsin rules that apply to Alliant Energy (WP&L)
The state framework sets the default. Where Alliant Energy (WP&L) pays something different, the utility tariff governs and is what the card above reports.
| Compensation mechanism | Monthly net-energy billing: the customer is billed on the difference between energy consumed and energy produced during the billing period; net excess is credited under the utility tariff. |
|---|---|
| Export rate | Utility-specific. 2026 examples are WEPCO CGS-NM residential/secondary flat rate $0.03636/kWh, Alliant/WP&L PgS-3 average $0.04254/kWh, and WPS PG-4 $0.03584/kWh; MGE uses its customer energy rate for Net Purchasers and its separate Parallel Generation Buyback Rates for Net Sellers. |
| Rate effective | WEPCO and WPS rates are effective for service on and after January 1, 2026; Alliant identifies its $0.04254 average as of January 1, 2026; MGE's current buyback schedule is effective June 1, 2026. |
| Credit rollover | Net excess is handled in the monthly billing period; utility tariffs may carry an accumulated credit until the tariff's payment threshold is met. WPS pays when a monthly credit balance exceeds $100, while MGE permits a check for a net account credit greater than $100. |
| Credit expiration | No single statewide expiration rule was identified: PSCW says the COGS size threshold is utility-specific and the net-metering terms are in each utility's tariff; individual tariffs control payment or cash-out treatment. |
| Annual true-up | There is no statewide annual true-up date in the cited PSCW materials. MGE determines Net Seller status at the beginning of each month using the preceding 12 months, and permits a credit check no more frequently than once every 12 months. |
| Aggregate program cap | No statewide aggregate net-metering capacity cap was identified in the PSCW materials reviewed; PSCW states that the COGS size threshold is utility-specific and listed in each utility's tariff. |
| Program status | Current utility tariffs remain the operative enrollment rules as of the verification date; PSCW's continuing investigation is evaluating net-metering rate design and related issues rather than publishing one statewide cap. |
| Grandfathering | Grandfathering is tariff-specific, not a single statewide rule. WPS's current PG-4 tariff preserves a historical full-retail provision only for qualifying customers through December 31, 2021 and says changes to size or type make the customer new; MGE uses an application/interconnection-date net-metering date for its customer energy rate. |
| Regulator | Public Service Commission of Wisconsin (PSCW). |
| Governing rule | Wis. Admin. Code ch. PSC 119 governs distributed-generation interconnection statewide; PSC 119.01 implements Wis. Stat. 196.496 and applies to DG facilities of 15 MW or less. |
| Pending change | PSCW docket 5-EI-157 remains the continuing investigation into parallel-generation purchase rates and net metering. The 2024 PSCW memorandum says MGE and WP&L proposed closing net metering to new customers in their 2023 rate cases and seeks further study of rate designs and incentive structures. |
Other Wisconsin utilities
- We EnergiesFixed rate$0.03636/kWh flat rate for residential and secondary customers
- Wisconsin Public ServiceFixed rate$0.03584/kWh avoided energy cost for PG-4 net excess
- Madison Gas & ElectricFormula basedNet Purchaser: Customer's Energy Rate; Net Seller: MGE Parallel Generation Buyback Rates.