Solar Panels Cost $7.5k-$17k in Gallatin County, MT | August, 2025
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How much do solar panels cost in Gallatin County, MT in 2025?
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During August, 2025, the typical cost of solar systems in Gallatin County, MT was $3.61/W.
Expect costs to be $3,610, on average, for every 1 kW (or 1000 watts) of solar energy your system will need to produce. You can conclude this by applying this rate price cost per watt above. In Gallatin County, you can expect to spend around $12,635 for a 5 kW solar installation once the 30% federal income tax credit is factored in. However, a 5kW systemmight not be sufficient to meet your energy needs.
On the left, you can select your county to find out the average roof size and the maximum capacity for residential solar on houses in your area. Outlined below are the price, payback period, and 20-year average savings for a 5 kW system installed in your county.
Average out-of-pocket cost for a 5 kW system The upfront amount spent to buy and install solar.
Gallatin County: $12,635US Average: $12,523
Average Payback Period The number of years until you break even on the solar investment.
Gallatin County: 10 yearsUS Average: 7 years
Average Net 20-year savings The total amount of money saved over 20 years minus the out-of-pocket cost.
Gallatin County: $6,437US Average: $17,429
Solar Potential in Gallatin County
Estimated system size and solar electricity production per median viable roof in Gallatin County.
Roof size 858sq. ft.
Capacity 12kW DC
Electricity 14.3kkWh AC per yr.
Electricity Costs in Gallatin County, MT & What that Means for Your Solar Panel Pricing
Energy consumers in Gallatin County typically use 785 kWh per month, with an average monthly bill of 102.03. Please note that this statistic includes data from apartments and smaller living spaces with lower energy requirements.
In August 2025, the mean electricity rate in Gallatin County, MT amounts to 13¢ per kWh.
Upfront, a 7 kW solar system costs around $25,270, after a 30% federal tax credit, the price drops to $17,689.
Go Solar for less than your cell phone bill.
Average solar panel costs by system size in Gallatin County
Displayed on the left side, is a thorough pricing structure of the different sizes of solar panel systems set up in Gallatin County. When you select a more extensive solar system, the cost is higher, but it also leads to greater electricity savings and a larger income tax credit.
The solar panel cost calculator to the right and below details costs and benefits, considering an average $102.03 electric bill in Gallatin County Replace the $102.03 with your usual electricity bill to get more accurate results.
System Size
Roof Size Min. space required
Electricity Value Annual Production
Est. Price
System Size 3kW
Roof Size Min. space required
215 ft²
Electricity Value Annual Production $529 a year
Est. Price
$7,581
Savings from a 3kWthis system
Est. yearly production 4,067 kWh
Est. monthly savings $44
Full payback in 6 years
Environmental Impacts
Reduces CO2 emissions by 2.5 tons a year
Equivalent to planting 115 trees a year
Equivalent to driving 6,188 mi less a year
System Size 4kW
Roof Size Min. space required
286 ft²
Electricity Value Annual Production $705 a year
Est. Price
$10,108
Savings from a 4kWthis system
Est. yearly production 5,422 kWh
Est. monthly savings $59
Full payback in 8 years
Environmental Impacts
Reduces CO2 emissions by 3.33 tons a year
Equivalent to planting 153 trees a year
Equivalent to driving 8,250 mi less a year
System Size 5kW
Roof Size Min. space required
358 ft²
Electricity Value Annual Production $881 a year
Est. Price
$12,635
Savings from a 5kWthis system
Est. yearly production 6,778 kWh
Est. monthly savings $73
Full payback in 10 years
Environmental Impacts
Reduces CO2 emissions by 4.17 tons a year
Equivalent to planting 191 trees a year
Equivalent to driving 10,313 mi less a year
System Size 6kW
Roof Size Min. space required
429 ft²
Electricity Value Annual Production $1,057 a year
Est. Price
$15,162
Savings from a 6kWthis system
Est. yearly production 8,133 kWh
Est. monthly savings $88
Full payback in 12 years
Environmental Impacts
Reduces CO2 emissions by 5 tons a year
Equivalent to planting 230 trees a year
Equivalent to driving 12,376 mi less a year
System Size 7kW
Roof Size Min. space required
501 ft²
Electricity Value Annual Production $1,234 a year
Est. Price
$17,689
Savings from a 7kWthis system
Est. yearly production 9,489 kWh
Est. monthly savings $102
Full payback in 14 years
Environmental Impacts
Reduces CO2 emissions by 5.79 tons a year
Equivalent to planting 266 trees a year
Equivalent to driving 14,326 mi less a year
Gallatin County Solar Panel Installation Incentives & Rebates | 2025
Between 80% and 100% of your solar energy or wind turbine installation costs may be covered by the REAP Grant if you own a rural small business or farm. Confirm if you are eligible by utilizing our REAP Grant eligibility tool.
Almost all homeowners can take advantage of the 30% federal income tax credit for residential solar, making solar energy a sensible option throughout most parts of the country. Several state and local efforts are designed to boost the adoption of solar energy.
Various utilities and government agencies in Montana have 8 solar rebate and incentive initiatives.
Solar incentives in MTIncentive Description Value
Alternative Energy Revolving Loan Program
Value:Varies
The Montana Department of Environmental Quality operates a revolving loan program for home and business owners making renewable energy improvements and investments. Repaid funds immediately "revolve" to support a new borrower. A maximum principal of $40,000 per loan is available at a variable interest rate (typically about 3.25%). Repayment periods can last up to ten years. Applicants will be subject to standard credit checks, site audits, and technical plan reviews. Due to a limited budget and the revolving nature of the fund, disbursement may not take place immediately upon approval. Additional information is available from the DEQ website.
Montana Solar and Wind Easements
Value:Varies
In Montana, property owners neighboring either a solar or wind energy system may voluntarily agree to easements protecting energy access. Easements are considered "attached" to the properties, but they may not add taxable value. At a minimum, easements should contain legal descriptions of the subject properties, quantitative measures of angles or affected airspace, compensation provisions, and terms and conditions which would result in the easement's modification or nullification. Easements are usually stored by local or county recorders. In some cases, they must be notarized before going into effect.
NorthWestern Energy - USB Renewable Energy Fund
Value:Varies
Rebate programs are available through NorthWestern Energy for customers making energy efficiency improvements or adopting renewable energy technology on their site. Funding for rebates comes from the state Universal System Benefits Program and is collected through a surcharge on customer bills. Available programs and offers will vary from time to time. Regular programs offer financial assistance to low-income customers and support educational initiatives on renewable energy. The E+ program supports public-sector facilities and nonprofits adopting renewable energy. Broad Benefits, a different program, incentivizes businesses to install solar photovoltaic panels. Additional information is available from the NWE website.
Net Metering
Value:Varies
Since 1999, all private utilities in Montana (such as NorthWest Energy) have been required to offer net metering contracts to their renewable energy customers. Any solar, hydroelectric, or wind system rated for under 50 kilowatts is eligible to participate. Montana takes a "right to net meter" approach. It is unlawful for a utility to force net metering applicants to comply with any interconnection standards beyond those set by the IEEE, UL, or National Electric/Electrical Safety Codes. Further, customers may choose the month that NEG transmission starts and stops. Interested customers should consult with their local utility, as not every utility offers net metering.
Universal System Benefits Program
Value:Varies
The Universal System Benefits Program (USBP) is a low-income energy assistance and renewable energy incentive program in Montana. Since 1999, it has been funded through bill surcharges collected by each utility and cooperative in the state with over 50 customers. The specific cost of the surcharge is set by the state legislature. There have been a few instances where legislators have adjusted the initiative manually; most of the time, surcharges have naturally adjusted for inflation. Additional information is available from individual utilities.
Alternative Energy Investment Tax Credit
Value:Varies
In Montana, there are corporate tax exemptions for businesses making depreciable investments of at least $5,000 in renewable energy systems and technologies. Exemptions last for seven years and can additionally apply to new construction and component manufacturing. If a renewable energy system under net metering is claimed, only NEG credits are considered exempt. Incentive extensions may apply to systems and investments on reservation land.
Property Tax Abatement for Production and Manufacturing Facilities
Value:Varies
In Montana, property owners may be eligible for tax abatements on renewable energy systems or equipment used to manufacture renewable energy components. The subject of the abatement will only be assessed at 50% of its value for up to nineteen years. To qualify, the subject of the abatement must have been built or installed after 2007 and be certified by the Department of Environmental Quality. Additional information is available from the DEQ website.
Interconnection Standards
Value:Varies
Currently, grid interconnection for renewable energy systems in Montana is not standardized on a central level. However, there is a capacity ceiling of 10 MW for systems that are eligible for interconnection. Previous standards, repealed in 2010, required renewable energy facilities to meet IEEE/NESC/UL standards and required utilities to offer net metering contracts. Systems were not divided into regulatory tiers, but there was a capacity ceiling of 50 kW for net metering. Individual utilities, such as NorthWestern Energy, may establish their own interconnection standards. As such, interested customers should consult with their local utility.
Are solar panels worth it in Gallatin County, MT?
If your goal is to own your home well past the payback period of your solar system, solar panels are an clear choice in Gallatin County. A 5 kW solar system in Gallatin County, MT could potentially save you $11,852.2 over the course of 20 years, with the break even point averaging at 10 years.
The cost of not having solar panels in Gallatin County, MT
The absence of solar panels or an alternative energy backup means that you forgo the savings noted earlier and depend on your electric utility for electricity. Recent news has proven that total reliance on your utility company is not always ideal.
Annually, the average number of outages per customer in Gallatin County is about 0.54. Typically, outages have an average duration of 49.8 minutes. However, during significant events such as aging infrastructure, tornadoes or planned maintenance, these times can drastically increase.
View the info below to see the number of current electricity customers without power in Gallatin County.
With or without a backup battery, a solar panel system could help to mitigate the effects of future power interruptions you might face.
Power Outages
Currently, 0 customers are being tracked in Gallatin County.
What impacts the cost of solar panels in Gallatin County, MT?
Your Energy Needs - Despite the larger initial expense, the cost per watt drops when using larger solar panel systems. Many individuals find it advantageous to set up a system that can generate enough electricity to replace the entirety of their electric bill. This math makes the most sense for optimal savings.
Make & Model - Similar to other industries, the solar energy sector features a wide range of solar panel brands and designs. Because the installer might have certain system preferences, it's important to select a reputable installer. The utilization of better equipment is probably will provide a more positive long-term experience for buyers.
Solar Panel Type - The standard in the industry is now monocrystalline panels, and for good reason. They have a higher price, but they produce more energy. Many solar panel installers opt for this kind of material.
Your Property - Each property and home has its own unique features. Sloped land, trees, or other barriers may add to the difficulty of the installation. Most solar installers today are able to leverage satellite imagery to assess your home and include these elements in the preliminary cost estimate.
Labor Rates - Companies offer different pay rates to their employees, which are then shown in the prices consumers pay. Higher wages frequently lead to companies getting better reviews for their work and customer service.
Permitting & Interconnection - The final price of your installation will be affected by local permitting and utility interconnection fees, which vary by location. Reliable local installers will incorporate these figures into your initial estimates to prevent any surprises.
See what solar panels cost in other Gallatin County cities
Solar systems for selling electricity back to the grid.
Expertise in consulting on advantageous financing for solar.
Gallatin County, MT Solar Panel Cost FAQs
During August, 2025, the average price for solar panel installations in Gallatin County, MT is $3.61/W. In Gallatin County, MT, installing a 5 kW solar panel system will set you back approximately $12,635 after federal tax incentives.
In Montana, you have access to 8 rebates and incentives provided by numerous utilities and government organizations. In addition, the 30% federal income tax credit is available to almost everyone.
While paying cash ensures the greatest savings, there are now various financing options for solar panels that are also beneficial. Installers will often provide details on financing partners in the quotes they provide initially.
Yes, the average 5 kW solar panel payback period in Gallatin County, MT stands at 10 years, yielding average electricity savings of $11,852.2 over 20 years.
Savings from 
Environmental Impacts 
