Solar Panel Cost Guide in Londonderry, NH (2025 Update)
- Londonderry Solar Installation Cost: $14,236
- 25-Year Savings: $16,083
- Payback Period: 13.7 Years
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Average Cost of Solar Panels in Londonderry
We go over average solar pricing in Londonderry.
Although the national average of solar panels is $2.66 per watt, solar panels in Londonderry generally cost around 4.Because a 4.8-kW system is needed to cover the energy usage of a typical home in Londonderry, the average price of going solar will be about $14,236 after claiming the federal solar tax credit of 0.
Bear in mind that the figures above are only estimates based on the average Londonderry homeowner. The cost of a solar system for your home may look different depending on factors unique to you, like your household energy use and solar contractor.But, once you've paid the initial cost of installation, the return on investment for most homeowners is quite rewarding, with a net average savings of about $20,000 over 20 years on energy bills.
To see your potential ROI and connect with a local solar company, click the button below.
Solar savings over time in Londonderry
| Year | Return on Investment |
|---|---|
| 1 years | $-12,829 |
| 3 years | $-10,016 |
| 5 years | $-7,202 |
| 7 years | $-4,388 |
| 9 years | $-1,575 |
| 11 years | $1,239 |
| 13 years | $4,053 |
| 15 years | $6,866 |
| 17 years | $9,680 |
| 19 years | $12,493 |
| 21 years | $15,307 |
| 23 years | $18,121 |
| 25 years | $20,934 |
Top Solar Installers in Londonderry
DIY solar panel installation is a way to cut costs, but it's an undertaking that can take a lot of hard work. Hiring a solar panel installer can make switching to solar power much easier. Plus, if you’re not certain what brand of solar panels and equipment you need, a solar installer can help you figure that out after a site survey and consultation.
You can get a free quote from a local solar installer on how much solar panels could cost for your home. Here are some nearby:
See all of the solar companies in Londonderry
Factors that Affect Solar Panel Costs in Londonderry
For many Londonderry homeowners, the decision to install a solar energy system comes down to cost. However, the range of solar installation costs can be quite wide in Londonderry, with typical prices between $20,000 to $40,000. There are a number of factors that considerably influence the price you’ll pay, which we'll go over below.
Solar Equipment
When it comes to estimating the cost of a solar energy system in Londonderry, one of the most important factors is the size of the system you need. Solar systems are sized by kilowatts (kW) and are chiefly based on your home’s energy consumption, which you can gauge by looking at past energy bills. Your total cost can increase by about $4,220 for each additional kilowatt you need.Some solar panel brands — like Maxeon from SunPower — are more costly upfront but also tend to offer better efficiency. In a city like Londonderry, where sunlight is relatively abundant, efficiency can quickly pay off. Plus, if you have a small roof or you don’t have a lot of space for your panels, higher efficiency options will be more impactful. Additional equipment like electric vehicle chargers and solar batteries will also increase the cost.
Solar Financing Terms
Solar panels can save you money on utility bills over many years, but they can also be a big investment. That’s why many Londonderry homeowners opt to finance their solar panel systems to make paying for solar more affordable.When considering your overall cost, you should also calculate the interest you’ll pay if you go with a solar loan. Also, paying more upfront can lower the total interest paid over time.
Solar Panel Installation Company
The solar company you opt for to handle your switch to clean energy can play a role in your total costs. There are about 3 solar installation companies in Londonderry, and each can charge different amounts for labor and equipment.Larger national companies typically have lower costs, but some local companies keep up with them by promoting sales and discounts. While the smaller companies might not have specific equipment options like Tesla Powerwall batteries or extra services like electric vehicle charger installation, they might be cheaper overall.
Solar Panel Cost Data by System Size
| System size | Cost per system watt | Solar system cost | 25-Year savings | Payback period |
|---|---|---|---|---|
| 6 kW | $4.39 | $18,433 | $13,813 | 14.3 years |
| 8 kW | $4.30 | $24,105 | $18,889 | 14.0 years |
| 10 kW | $4.22 | $29,540 | $24,203 | 13.7 years |
| 12 kW | $4.14 | $34,739 | $29,752 | 13.5 years |
| 14 kW | $4.05 | $39,702 | $35,538 | 13.2 years |
| 16 kW | $3.97 | $44,428 | $41,560 | 12.9 years |
| 18 kW | $3.88 | $48,918 | $47,819 | 12.6 years |
| 20 kW | $3.80 | $53,172 | $54,313 | 12.4 years |
How to Save on Solar Panels
The company that does your system installation will affect the warranties and brands you have access to, and it will also have an impact on your total cost. Because choosing a company can be difficult, we have some tips to help you, such as:
- Warranty: An all-inclusive, 25-year warranty can help keep your solar panel system running for years to come and save you money on part replacement and repairs.
- Reputation: Companies that have been in business for many years likely have a good reputation. This is important because it ensures that it will not only see your solar installation through, but will also provide quality aftercare and customer service, such as part repairs and replacements.
- Installation Process: Make sure you’re aligned with the company in regard to how the installation process will go and what you need to do before your solar panels are installed, such as updating or replacing your electrical system or roof.
- Contract: Although reading through a contract can take a lot of time, it’s important to do it fully so you can make sure you understand how much the equipment and services will cost and the terms of the warranty.
EcoWatch's Londonderry, NH Solar Cost FAQs
How much does it cost to install solar panels in Londonderry?
This is a difficult question to answer exactly, because the cost depends on a few different factors. Broadly speaking, it costs about $21,100 for a 5-kW system and $42,200 for a 10-kW system after the ITC is applied. It will be more expensive if you want additional solar equipment or more efficient panels, or if you have above-average energy needs. Conversely, you can spend less if you choose a smaller solar panel system or less expensive solar panels.
What other factors should I consider in addition to cost when buying solar panels?
The upfront cost is a very important factor to consider, but whether it’s the most important for you depends on your reasons for going solar. In areas where rooftop space is limited, efficiency can trump the cost. Other factors that are important to keep in mind are the quality and durability of your solar panels.
Is switching to solar power worth it?
Solar panels can be a beneficial investment for most homeowners, but they might not be worth it for everyone. If your home doesn't get a lot of direct sunlight and/or your electricity bills are already fairly low, solar panels might not be for you.
How many solar panels should I get to power my home?
The exact number of solar panels you need depends on your household energy usage and the amount of sunlight your roof gets. You can take a look at your energy bills for the past year to get an idea of the solar system size you'll need. The average household has to install between 20 and 35 panels to cover their typical energy usage.
Our goal is to reach as many people as we can with sensible solutions like solar energy. Our team of full-time local researchers collects solar price and installation data for every city in America then compiles it to create these digestible city guides. If you want to read our solar expert's opinion on the top solar companies featured here, follow this link.