SB 188 establishes Montana's "Solar Shares Act," creating a new framework for shared solar energy programs. It defines "shared solar facilities" (50kW-5MW systems serving multiple customers in the same utility area) and requires utilities to interconnect them, replacing net metering with "on-bill credits" for subscribing customers. Key provisions include: utilities must apply credits to subscribers' bills based on their share of generation, facilities must be within the utility's service territory, and credits can transfer between accounts or support low-income programs. The bill directly affects public utilities, shared solar facility owners, and residential/commercial customers who subscribe to shared solar.
SB 283 would establish new height and lighting rules for wind energy projects in Montana. It requires all new wind turbine towers built after January 1, 2026, to not exceed 350 feet in height (measured from ground to turbine hub center), and mandates federal aviation-approved aircraft detection lighting systems on towers over 200 feet tall. These rules apply to new wind generation facilities (defined as projects with 25+ megawatt capacity) but do not affect existing towers built before 2026. The bill also provides definitions for key terms like "wind generation facility" and "turbine rotor hub" to clarify the regulations. The proposed changes would directly impact developers and operators planning new wind energy projects in Montana.
SB 160 requires owners of qualifying wind and solar energy facilities in Montana (solar: 2+ megawatts, wind: 25+ megawatts) to provide a decommissioning bond before construction begins. The bond amount, determined by the Department of Environmental Quality based on the owner's decommissioning plan, ensures funds are available to dismantle facilities and restore land within 24 months after a facility's end of life or abandonment. This applies to new projects and modifies existing requirements for facility owners to submit plans and bonds prior to commercial operation.
SB 406 would require Montana's investor-owned utilities to implement energy conservation programs achieving at least 1% of their average annual electricity sales in savings by 2026. Utilities must conduct biennial assessments to identify cost-effective conservation opportunities (like efficient appliances, lighting, and grid improvements) and submit plans for commission approval. The law mandates that programs be funded through customer rates, with utilities allowed to recover costs and share in rewards for successful conservation investments. It aims to reduce peak electricity demand, improve grid reliability, and defer costly infrastructure investments without specifying outcomes.
SB 294 requires Montana's public utilities (like electricity providers) to create a detailed plan by May 2026 showing how they will source 100% of their retail electricity from renewable energy (including hydroelectric power) and reduce greenhouse gas emissions. The plan must outline specific options, timelines, and challenges for achieving these goals, aligning with Montana's constitutional duty to protect the environment. Utilities must submit these plans to the Energy and Telecommunications Interim Committee by June 2026, which will review them, gather public input, and recommend changes to the next legislature. The bill takes immediate effect upon passage but is currently inactive after dying in committee.
SB 445, "Montana Transparency in Energy Economics Act," would have required investor-owned utilities to create a public energy dashboard by June 2026 showing real-time data on power sources, grid contributions, and costs per megawatt hour. Public utilities would have needed to provide quarterly reports detailing power sources (like coal, wind, solar), consumption by customer class, and costs. The bill directly affects residential and small commercial customers (defined as using ~750 kWh monthly) by making energy billing costs more visible. However, the bill died in committee on May 23, 2025, and never became law.
SB 343 would change how Montana allocates remaining coal severance tax revenue after other specified uses. Currently, until 2027, interest income from the coal trust fund is sent to the general fund for specific programs like agriculture development, small business centers, and library services. This bill amends the law to redirect all remaining coal tax revenue (after other allocations) directly to the coal severance tax permanent fund starting July 1, 2027, instead of the general fund. The policy change would shift funding away from current general fund programs toward the coal trust fund, which supports coal-dependent communities and projects.
HB 939 establishes new regulations for wind turbine generators, primarily affecting developers and property owners involved in wind energy agreements. The bill mandates a 1,500-foot setback for new wind turbines 500 feet or taller from occupied residences, unless the property owner approves a closer distance. It also sets a deicing standard, limiting rotor blade speed to 10% of maximum for certain tall turbines near residences, with a similar provision for property owner approval. Furthermore, it updates the required content for wind energy agreements executed after January 1, 2026.
HB 760 establishes consumer protection laws for individuals purchasing residential solar energy systems in Montana. It grants solar buyers a 3-business-day right to cancel a contract after signing, requiring written notification to the solar company or agent. Solar sales agents must provide a written explanation of these cancellation rights, which the customer must acknowledge. Additionally, the bill prohibits solar companies and sales agents from making deceptive statements about the costs, financing, or terms of solar energy system purchases during solicitations.
HB 623 establishes the conditions under which temporary spent nuclear fuel storage facilities can be sited within the state. It specifies that such facilities must be located on the site of an existing nuclear power generating facility and store fuel produced by that facility. Authorization for these facilities also requires a state recommendation from the Department of Environmental Quality (DEQ) and a license from the federal Nuclear Regulatory Commission. The bill amends existing law to clarify the DEQ's role in reviewing federal applications for these facilities, requiring applicants to submit their federal applications to the DEQ and pay a fee for the department's review and participation in federal proceedings.