Solar PV in Montana
Which codes apply? In Montana, solar PV systems fall under the 2023 NEC, the 2024 IRC, the 2024 IBC, and the 2021 IFC.
Codes that reach solar PV systems
The edition Montana enforces for each code that governs the product, and the part of the code that does.
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NECNational Electrical CodeThe Montana NEC record2023 NECPartial
in force since Sep 26, 2026
Where it reaches the product. Article 690, solar photovoltaic systems, with 705 for the interconnection and 690.12 for rapid shutdown.
National Electrical Code (NFPA 70) under the Montana state building code · ARM 24.301.401
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IRCInternational Residential CodeThe Montana IRC record2024 IRCPartial
in force since Sep 26, 2026
Where it reaches the product. Section R324, solar energy systems.
International Residential Code, 2024 Edition, as adopted in the Montana state building code · ARM 24.301.154
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IBCInternational Building CodeThe Montana IBC record2024 IBCPartial
in force since Sep 26, 2026
Where it reaches the product. Rooftop structures and the structural load of the array.
International Building Code, 2024 Edition, as adopted in the Montana state building code · ARM 24.301.131; ARM 24.301.109; ARM 24.301.146 (modifications)
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IFCInternational Fire CodeThe Montana IFC record2021 IFCPartial
Where it reaches the product. Chapter 12, section 1205, solar photovoltaic power systems and roof access.
International Fire Code 2021 Edition (2021 IFC) · ARM 23.12.601
The 2024 IFC is proposed.
Montana laws that name solar PV systems
Statutes, rules, and commission orders are tracked state by state.
No Montana law or rule on the site names solar PV systems. The product page shows the states that have one.
For information only. Your local building or fire official decides which code applies. We check state records often but can miss a recent change, so confirm with your official before you design, permit, or install. Terms of use