Long summer days, harsh winters — here's the real solar story in Big Sky Country.
| ☀️ Peak Sun Hours | 4.2 hrs/day (moderate — long summer days offset shorter winters) |
| ⚡ Avg Electricity Rate | $0.115/kWh (EIA 2025 — among the lowest in the U.S.) |
| 🏠 Typical 6 kW System Cost | $17,500 after 30% Federal Tax Credit (ITC) |
| 📈 Payback Period | 13–16 years (industry estimate for average MT home) |
| 🔌 Net Metering Policy | ✅ Available — NorthWestern Energy offers net metering |
| 💰 25-Year Total Savings | $32,000+ (estimate based on 4% annual electricity inflation) |
Montana has a unique solar profile: very low electricity rates (good for your wallet, bad for solar payback) but excellent summer production thanks to long daylight hours. Here's the full picture:
Montana's peak sun hours (4.2 hrs/day on average) don't tell the full story. In summer, Montana gets 15+ hours of daylight, and solar panels produce significant electricity even at low sun angles in early morning and late evening. A 6 kW system in Billings, MT produces about 7,200 kWh/year (NREL PVWatts) — less than Arizona but still enough to cover 60–70% of average household consumption.
NorthWestern Energy (Montana's largest investor-owned utility) offers net metering for residential solar systems. Key details:
Montana has some of the lowest electricity rates in the country ($0.115/kWh on average). This means:
However, even at low rates, solar makes sense as a long-term hedge against rising electricity costs. Montana's rates are projected to rise as coal plants retire and are replaced with more expensive generation sources.
The 30% Federal Investment Tax Credit (ITC) applies to Montana solar installations through 2032. For a $25,000 system (before incentives), that's $7,500 back as a tax credit.
Montana's harsh winters and occasional severe weather (including blizzards and ice storms) make battery storage a particularly smart addition to a solar system. With battery backup, you maintain power during outages — which can last days in remote Montana areas. Additionally, Montana's net metering doesn't "pay" you for excess summer production at a premium rate, so self-consuming your solar electricity (via battery) can be more valuable than sending it to the grid.
NorthWestern Energy serves about 370,000 electric customers in Montana and offers net metering. The program details are favorable:
Montana solar customers can claim 30% of total system cost as a federal tax credit. This applies to equipment, installation, permitting, and even battery storage if installed with the solar system.
Montana offers a property tax exemption for renewable energy systems, including solar. This means the added home value from your solar installation will not increase your property tax assessment. This is a significant benefit — in many states, solar panels increase your home's value (which is good for resale) but also increase your annual property tax bill. Montana avoids this trade-off.
Some Montana electric cooperatives offer one-time rebates for solar installations. Check with your specific co-op (such as Flathead Electric Cooperative or Park Electric) for current offerings. These rebates are typically $500–$1,500 and can meaningfully reduce your upfront cost.
Location: Billings, MT
System size: 6 kW (18 × 350W panels)
Roof direction: South-facing, 45° tilt (optimal for MT latitude)
Electricity rate: $0.115/kWh (NorthWestern Energy)
Annual production: ~7,200 kWh (NREL PVWatts estimate for Billings, MT)
| Item | Amount |
|---|---|
| Annual solar production | 7,200 kWh |
| Value at retail rate ($0.115/kWh) | $828 |
| System cost after 30% ITC | $17,500 (upfront, after tax credit) |
| Simple payback period | ~15 years |
Estimated monthly savings: ~$69 | Yearly: $828
Note: These estimates assume net metering is available. Without net metering, the payback period extends to 20+ years. Adding battery storage adds upfront cost but provides backup power value during Montana's winter storms.
Montana's harsh winters are the biggest concern for prospective solar customers. Here's what the data says:
| Month | Production (kWh) | % of July Production |
|---|---|---|
| January | 280 | 23% |
| March | 620 | 51% |
| July | 1,220 | 100% |
| December | 240 | 20% |
Key takeaway: Montana's winter solar production is low (20–23% of peak summer output), but this is normal for high-latitude locations. The net metering "summer banking" strategy works well in Montana: you overproduce in summer, build credits, and use them in winter. A properly sized system can still achieve net-zero annual electricity bills.
Montana solar panels will be covered by snow in winter. However, solar panels are typically installed at a steep angle (40–50° in Montana), which helps snow slide off. Additionally, the dark color of solar panels absorbs sunlight and warms up faster than the surrounding roof, accelerating snow melt. Most Montana solar owners find that panels clear themselves within 1–3 days after a snowstorm. You do not need to manually clear snow from panels (and doing so can void warranties or cause injury).
Yes. NorthWestern Energy (Montana's largest investor-owned utility) offers net metering with full retail rate credit. If you are served by an electric cooperative, net metering availability varies — contact your co-op directly.
A typical 6 kW solar system in Montana saves about $69/month, or $828/year (assuming net metering at $0.115/kWh). Over 25 years, total savings exceed $32,000 (assuming 4% electricity inflation and 0.5% annual panel degradation). Your actual savings depend on your electricity usage, roof direction, and local rate.
Battery storage is more valuable in Montana than in many other states because of (1) harsh winter weather that can cause extended outages, and (2) the fact that net metering doesn't provide premium compensation for summer surplus. A battery lets you use your solar electricity directly during outages and avoids sending valuable summer production to the grid at retail rates.
Montana's very low electricity rates ($0.115/kWh) mean each kWh of solar production saves you less money than in high-rate states like California ($0.30/kWh) or New York ($0.24/kWh). This extends payback periods. However, solar still makes sense as a long-term investment and backup power solution.
Yes. In many states, adding solar panels increases your home's assessed value by $15,000–$25,000, which can add $300–$800/year to your property tax bill. Montana's exemption means you get the home value increase without the tax increase — a meaningful long-term benefit.
Our solar calculator gives you a personalized estimate based on your location, electricity usage, and Montana's solar conditions. Takes 30 seconds, no email required.
Calculate My Solar Savings →Electricity rates: U.S. Energy Information Administration (EIA), Montana Electricity Profile 2025.
Solar production estimates: NREL PVWatts Calculator, using Billings, MT weather data.
Net metering policies: Database of State Incentives for Renewables & Efficiency (DSIRE), Montana profile.
Federal tax credit: IRS Form 5695 instructions (2026 revision).
Property tax exemption: Montana Department of Revenue, Renewable Energy Systems Exemption.
Disclaimer: These are estimates for planning purposes. Actual savings vary based on your specific home, utility, roof orientation, and installation costs. Consult a licensed solar installer for a precise quote.
The average cost of a residential solar system in Montana is $15,000-$25,000 before incentives (for a 6-10 kW system). After the 30% federal Investment Tax Credit (ITC), the net cost drops to roughly $10,500-$17,500. Actual costs vary based on roof complexity, panel brand, installer choice, and local permitting fees. Montana homeowners should get at least 3 quotes to compare pricing.
All U.S. homeowners qualify for the 30% federal Investment Tax Credit (ITC) through 2032. This credit reduces your federal taxes by 30% of your total system cost. In addition to the federal ITC, some states offer additional rebates, property tax exemptions, or sales tax exemptions on solar equipment. Check with your local utility and the Database of State Incentives for Renewables & Efficiency (DSIRE) for Montana-specific programs.
The typical solar payback period in Montana ranges from 7 to 12 years, depending on your electricity rate, system size, available incentives, and financing terms. After the payback period, your solar panels essentially produce free electricity for the remaining 15+ years of their 25-30 year lifespan. Higher electricity rates and strong sun exposure lead to faster payback periods.
Yes. According to a study by Lawrence Berkeley National Laboratory (LBNL), homes with solar systems sell for an average of $15,000-$25,000 more than comparable homes without solar. The exact premium depends on your location, system size, and age. Many states including Montana offer property tax exemptions for the added value from solar, so you won't pay higher taxes even though your home is worth more.
Solar works best on south-facing roofs with minimal shading, but east-west orientations can still produce 80-90% of optimal output. Key factors include: roof condition (should have 15+ years of life left), tilt angle (30-45 degrees ideal), and shading from trees or nearby buildings. A reputable installer will perform a free site assessment using satellite imagery to estimate your production potential before you commit to anything.