Capital Program Planning for Wisconsin Electric Utilities

by | Oct 21, 2026

Wisconsin · Electric & Grid Utilities

A $37.5 billion build meets the biggest data-center wave Wisconsin has ever seen. Your capital plan is where it lands.

Microsoft's Mount Pleasant campus is stacking gigawatts of new load onto a grid where coal is retiring and MISO is planning tens of billions in new transmission. Every one of those forces reshuffles the projects on your list. Invizion helps electric utilities re-sequence a capital portfolio in a click — and defend every decision.

See how Invizion helps utilities See what Wisconsin utilities face Download the briefing (PDF)
The bottom line: Wisconsin's grid is absorbing the largest data-center load in its history — Microsoft's $3.3 billion Mount Pleasant campus — while coal retires and MISO plans tens of billions in new transmission. The utilities that keep pace will be the ones whose capital plans can re-sequence as fast as the load forecast changes.
$37.5B1
WEC Energy Group's 2026–2030 capital plan — the largest in company history, driven by data centers and other new load.
$3.3B2
Microsoft's data-center investment in Mount Pleasant, Wisconsin, through the end of 2026.
~1,190 MW3
Oak Creek coal capacity We Energies retired in 2024–2025 (Units 5–8).
17.54¢4
Wisconsin's average residential price per kWh — above the U.S. average and among the highest in the Midwest.

The Wisconsin Landscape

Four forces are moving your project list at once

None of these is theoretical, and none of them waits for your next budget cycle. Together they mean the capital plan you approved last year may already be the wrong plan.

Demand — Load Growth

Gigawatts of data-center load, arriving fast

Microsoft is investing $3.3 billion in a Mount Pleasant data-center campus and expects to exceed 4,000 MW flowing into the local grid by 2027 — enough power for more than three million homes.2 That single customer is why WEC Energy Group has approved solar and new natural-gas generation and brought Wisconsin's first large-scale battery online.5

The load is already showing up: WEC's weather-normal retail electricity deliveries rose 1.2% in the second quarter of 2026, led by large commercial and industrial customers.6 Every large new customer is a capacity commitment competing for the same capital.

Reliability — Adequacy & MISO

A tightening MISO footprint

Wisconsin sits inside MISO, the 15-state grid operator that has warned of thinning reserve margins as coal retires faster than replacements come online.8 Natural gas is now the state's leading generation source, and Wisconsin imports roughly 6% more electricity than it produces.7

The one bright spot for baseload: Point Beach's two reactors, about 1,182 MW and roughly 16% of Wisconsin's power, won subsequent license renewals in 2025 to run into the early 2050s.9

Generation — The Transition

Coal out, gas and solar in — on a capital clock

We Energies retired Oak Creek Units 5–6 (550 MW) in May 2024 and Units 7–8 (about 642 MW) in 2025, with a goal of ending coal use by 2035.3 Alliant's Madison-area peer MGE is retiring its share of the Columbia coal plant and advancing a 300 MW solar center.10

Coal still supplies roughly 35% of Wisconsin's electricity against 37% natural gas, 15% nuclear, and a growing solar share — so the replacement build is still mostly ahead of the state.4 We Energies calls itself the largest renewable-energy investor in Wisconsin.11

Capital — Grid & Transmission

Build generation and the wires at the same time

WEC Energy Group is spending $37.5 billion over 2026–2030, its largest-ever plan, across generation, distribution, LNG capacity, and transmission.1 On top of company capex, MISO approved a roughly $30 billion regional transmission portfolio in December 2024, projecting $23–$72 billion in net benefits over 20 years across its footprint, Wisconsin included.8

New obligations don't replace the backlog. They stack on top of it, and something on the list has to move.

Who Runs Wisconsin's Grid

Investor-owned utilities, cooperatives, and municipal power

Wisconsin's grid is carried by four large PSC-regulated investor-owned utilities plus generation cooperatives and dozens of municipal systems. The pressures are shared; the accountability path differs.

Investor-owned utilities

Rates & capital recovery regulated by the PSC of Wisconsin

We Energies (Wisconsin Electric, WEC Energy Group) 1.1M+ electric customers in Wisconsin11
Wisconsin Public Service (WEC Energy Group) Northeast & central Wisconsin; part of WEC's 4.8M-customer base5
Alliant Energy — Wisconsin Power & Light (WPL) Southern & central Wisconsin12
Madison Gas & Electric (MGE) ~172,000 electric customers · Dane County10
Xcel Energy — NSP-Wisconsin Northwestern & west-central Wisconsin13

WEC Energy Group alone plans $37.5 billion of capital over 2026–2030.1

Cooperatives & municipal power

Governed by boards & members, not PSC rates

Dairyland Power Cooperative Wholesale to 24 distribution coops & 27 municipal utilities14
WPPI Energy Member-owned power for municipal utilities across WI, MI & IA
Municipal electric utilities Dozens of city-owned systems statewide

Cooperatives and municipals set their own rates through boards and members — capital decisions made in front of the customers who pay for them.

Rate-Setting & Oversight

Every capital dollar has to be defensible

Whether you answer to the Public Service Commission or an elected board, the question is the same: why this project, why now, why at this cost?

  • Public Service Commission of Wisconsin (PSC) regulates rates, capital recovery, and Certificates of Public Convenience and Necessity (CPCNs) for the investor-owned utilities — We Energies, Wisconsin Public Service, Wisconsin Power & Light, MGE, and NSP-Wisconsin.15
  • New generation runs through CPCN dockets. Recent filings before the PSC include the Foundry Ridge Energy Center (Docket 9835-CE-100) and Red Oak Ridge Energy Center (Docket 9837-CE-100), plus LNG storage cases at Oak Creek — approvals are not a formality.15
  • Frequent rate reviews. WEC and its peers file recurring rate cases to recover a fast-growing rate base — a $37.5 billion capital plan has to be turned into approved, recoverable spend, year after year.15
  • Cooperatives and municipals such as Dairyland Power and WPPI Energy set rates through their own boards and members rather than the PSC.14

Funding On The Table

The money is moving — can your plan absorb it?

Wisconsin utilities have more grid and generation capital in motion than they've had in a generation. The constraint is readiness: which projects qualify, which are shovel-ready, and how the timing lines up.

  • WEC Energy Group: $37.5B, 2026–2030 — the largest capital plan in company history, spanning generation, distribution, LNG capacity, and transmission.1
  • Microsoft: $3.3B private investment in Mount Pleasant, including a 250 MW solar project with National Grid Renewables beginning in 2027.2
  • MISO regional transmission: ~$30B approved December 2024, with $23–$72 billion in projected net benefits over 20 years across the footprint, Wisconsin included.8
  • DOE GRIP: $7.6B nationally across 105 grid-resilience and innovation projects in rounds 1–2 — a pool Wisconsin utilities and transmission owners can compete for.16
  • IRA elective-pay (direct-pay) tax credits put utility-scale solar and storage in reach for public power and cooperatives like Dairyland Power and WPPI Energy.

Where Invizion Fits

Turn Wisconsin's grid build-out into a defensible capital plan

Invizion is scenario-based capital portfolio optimization built for utilities. When load forecasts jump, a grant lands, or a retirement date moves, you don't re-plan by hand for weeks — you model it and decide with a record to stand behind.

1

Model the “what-if” before it's forced on you

A data-center interconnect, a delayed transmission line, a moved retirement date — build the scenario and see the impact on the whole portfolio, side by side with today's plan.

2

Re-sequence 500 projects in a click

When priorities move, Invizion re-orders the portfolio automatically — accelerating, stretching, or deferring projects against the constraints you set, not weeks of spreadsheet surgery.

3

Give regulators or your board a defensible record

Every prioritization and trade-off is captured. When you're asked “why this project, why now,” the answer is documented — not reconstructed after the fact.

Wisconsin's Grid, In Brief

Questions Wisconsin utility leaders are asking

Short, sourced answers — the same facts we dig into with utilities looking at their capital programs.

How fast is Wisconsin's electricity demand growing?
Microsoft's $3.3 billion Mount Pleasant campus expects to exceed 4,000 MW flowing into the local grid by 2027, and WEC's weather-normal retail electricity deliveries rose 1.2% in the second quarter of 2026, led by large commercial and industrial customers.26
What's happening to Wisconsin's coal plants?
We Energies retired Oak Creek Units 5–6 (550 MW) in 2024 and Units 7–8 (about 642 MW) in 2025, aiming to end coal use by 2035, while MGE is retiring its Columbia coal share and building solar.310
Who regulates Wisconsin electric rates?
The Public Service Commission of Wisconsin regulates rates, capital recovery, and CPCNs for investor-owned utilities such as We Energies, WPS, WPL, MGE, and NSP-Wisconsin. Cooperatives and municipal utilities set their own rates through boards and members.1514
Why are Wisconsin's electricity rates comparatively high?
Wisconsin's average residential price is about 17.54 cents per kWh, above the U.S. average, reflecting heavy capital investment — WEC alone is spending $37.5 billion over 2026–2030.41
What grid and transmission investment is coming?
MISO approved a roughly $30 billion regional transmission portfolio in December 2024, WEC is investing $37.5 billion through 2030, and DOE's GRIP program has $7.6 billion in play nationally that Wisconsin utilities can compete for.8116
How does Invizion help Wisconsin electric utilities plan capital?
Invizion is scenario-based capital portfolio optimization for utilities. It lets you model how a data-center load surge, a coal-retirement date, a transmission allocation, or a grant reshuffles your whole project list, re-sequence the portfolio automatically, and keep a defensible record of every decision for the PSC of Wisconsin or your board.

Go Deeper

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About the Author

GB

Guy Barlow

President, Invizion

Guy Barlow leads Invizion, a capital lifecycle management platform for water and wastewater utilities. He has spent two decades at the intersection of utility capital programs, funding, and analytics, helping utilities make faster, more defensible capital decisions.

Explore Further

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Invizion helps utilities model, optimize, and defend their capital programs. Explore how it works, or read our latest thinking on capital planning across the utility sector.

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This briefing was last reviewed September 2026.

Sources

  1. StockTitan / WEC Energy Group 2025 Corporate Responsibility Report — $37.5 billion capital plan for 2026–2030, 2026. www.stocktitan.net
  2. Microsoft News — $3.3 billion investment in Wisconsin (Mount Pleasant); 250 MW solar with National Grid Renewables; 4,000+ MW into the local grid by 2027, 2024. news.microsoft.com
  3. Wikipedia — Oak Creek Power Plant: Units 5–6 (550 MW) retired May 2024, Units 7–8 (641.6 MW) in 2025; coal exit by 2035. en.wikipedia.org
  4. FindEnergy (EIA data) — Wisconsin residential rate 17.54¢/kWh vs U.S. 16.73¢; generation mix ~37% gas, ~35% coal, ~15% nuclear, ~5% solar, ~3% wind. findenergy.com
  5. StockTitan / WEC Energy Group 2026 Annual Meeting — 4.8M customers; Wisconsin's first large-scale battery online; solar and natural-gas generation approved and under construction for data-center growth; >$51B total assets, 2026. www.stocktitan.net
  6. StockTitan / WEC Energy Group Q2 2026 results — weather-normal retail electricity deliveries +1.2%, led by large C&I; H1 2026 capex $2.08B, 2026. www.stocktitan.net
  7. U.S. Energy Information Administration — Wisconsin State Electricity Profile: average retail price 12.72¢/kWh, ~65.3M MWh net generation, natural gas leading source, 2024. www.eia.gov
  8. Wikipedia — Midcontinent Independent System Operator (MISO): 15-state RTO incl. Wisconsin; ~$30B transmission plan approved December 2024, $23–$72B projected net benefits over 20 years. en.wikipedia.org
  9. Wikipedia — Point Beach Nuclear Plant: 1,182 MW, two reactors (NextEra); subsequent license renewals granted Sept. 29, 2025 to the early 2050s; ~16% of Wisconsin electricity. en.wikipedia.org
  10. Wikipedia — Madison Gas and Electric: ~172,000 electric customers in Dane County; Columbia coal retirement by 2025; proposed 300 MW solar center. en.wikipedia.org
  11. We Energies — more than 1.1 million electric customers in Wisconsin; largest renewable-energy investor in the state, 2026. www.we-energies.com
  12. Wikipedia — Alliant Energy / Wisconsin Power & Light: serves southern and central Wisconsin; Edgewater (Sheboygan) and Columbia coal plants. en.wikipedia.org
  13. Wikipedia — Northern States Power Company: NSP-Wisconsin operates as a separate Xcel Energy subsidiary serving Wisconsin and the Michigan U.P. en.wikipedia.org
  14. Wikipedia — Dairyland Power Cooperative: wholesale power to 24 distribution cooperatives and 27 municipal utilities across western Wisconsin, SE Minnesota, NE Iowa, NW Illinois. en.wikipedia.org
  15. Public Service Commission of Wisconsin — Highlighted Cases: Foundry Ridge Energy Center (9835-CE-100), Red Oak Ridge Energy Center (9837-CE-100), Oak Creek LNG (6630-CG-140). psc.wi.gov
  16. U.S. Department of Energy, Grid Deployment Office — GRIP program: $7.6 billion across 105 projects in rounds 1–2. www.energy.gov