Green County, WI — Solar Development Risk Assessment

Local solar ordinance barriers, board sentiment, and utility policies that affect development timelines and risk.

38.6
Risk Grade
Good
S WI; Monroe area; Swiss heritage; dairy farming; active solar market; local CUP
Assessment Snapshot
Population
37,225
State Rank
#8
Compliance
50%
Trajectory
48

Moratorium Status

✓ No Active Moratorium
No Moratorium

Ordinance & Regulations

Setback Requirements
None codified. No confirmed county-specific setbacks.
Zoning Mechanism
Green County: CUP in Agricultural/Industrial district for projects <100 MW.
Acreage Caps
None codified.
Density Caps
None codified.
Spacing Rules
None codified.
Size Restrictions
None codified.

Board Sentiment & Political Risk

Sentiment Analysis
Generally receptive — agricultural community; Madison proximity
Basis for Assessment
S WI; Monroe area; Swiss heritage; dairy farming; active solar market; local CUP
Political Risk Factors
Stable
Board Members
County Board of Supervisors | partisan elections | 2-yr terms | see county official website for current roster

Grid, Utilities & State Context

Grid Operator
MISO / Madison Gas & Electric (MGE) zone
Utilities
Alliant Energy (IP), Green County Electric Coop
State Permitting Process
PSC of Wisconsin has siting authority for wind/solar ≥100 MW (Wis. Stat. §196.491). Projects <100 MW: local CUP/SUP under county/town zoning governs. Local restrictions on wind systems must meet one of 3 conditions: (1) public health/safety; (2) not significantly increase cost/decrease efficiency; (3) allows comparable alternative. Local solar restrictions face similar reasonableness standard. No statewide preemption below 100 MW threshold — strong local control. MISO interconnection territory statewide.
State Incentives
Wisconsin RPS: 10% renewable by 2015 (met — weakest in region). Focus on Energy program: commercial/industrial rebates for solar ($150-450/kW for ≤25 kW). Property tax exemption: Wis. Stat. §70.111(18) — solar systems exempt from property tax assessment. Sales tax exemption: Wis. Stat. §77.54(57m) — solar equipment purchases exempt. Wisconsin Green Energy program: voluntary renewable program through WPS, MGE, We Energies. Alliant WPL (WI) has deployed ~1,089 MW solar by 2024; Vista Sands (1,315 MW Portage Co.) approved June 2025 — largest WI solar project. Utility: We Energies (WEC) serves SE WI/Milwaukee; WPS (WEC) serves NE WI; Alliant Energy (WPL) serves central/southern WI; MGE serves Madison metro; Xcel NSPW serves far NW WI; Dairyland Power Coop and WPPI Energy serve rural areas.

Development Activity

Active/Completed Projects
Albany Solar | Green County | Alliant WPL | PSC approved 2023 (Class of 2023, RENEW WI Dec 2023) | Operational 2024
Denied/Withdrawn Projects
No confirmed Wisconsin PSC (Public Service Commission) denials for Green County. Wisconsin PSC issues CPCN for utility-scale projects.

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