Solar Panel Cost Guide in Londonderry, NH (2023 Update)

  • Londonderry Solar Installation Cost: $14,236
  • 25-Year Savings: $16,083
  • Payback Period: 13.7 Years

See cost of a solar system near you:

By EcoWatch Local Advisors

Data Analysis: James Savino

Ranking Methodology: Karsten Neumeister

Updated February 03, 2024

Why you can trust EcoWatch

We work with a panel of solar experts to create unbiased reviews that empower you to make the right choice for your home. No other site has covered renewables as long as us, which means we have more data and insider information than other sites. Our rankings are never affected by revenue or partnerships.

Average Cost of Solar Panels in Londonderry

We go over average solar pricing in Londonderry.

In Londonderry, solar panels cost about 4 per watt on average.The average solar panel system size in Londonderry is around 4.8 kilowatts, meaning a cost of about $14,236 for a solar installation, or $20,357 before the 0 federal solar tax credit is applied.

Keep in mind that the numbers above are only averages. The price you’ll end up paying for solar may vary based on your household energy use, the type of solar system you want, your solar contractor and more.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 electricity bills.

You can click the button below to get connected with a vetted solar company in Londonderry for a quote for your home.

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

Installing solar panels on your own can be a difficult project, which is why getting a solar installer is a good option for many homeowners. Also, companies with an outstanding reputation that are more expensive upfront could actually save you money in the long term because of their warranties, repair services and expert design.

You can work with a local solar installer to get a free quote on the cost of solar panels for your home. Here are some in Londonderry:

Best National Provider

SunPower

★★★★★
5.0

  • Most efficient panels on the market
  • National coverage
  • Cradle to Cradle sustainability certification
  • Great warranty coverage
  • Expensive
  • Customer service varies by local dealer

Best for Leasing

Sunrun

★★★★★
4.0

  • Expansive service area
  • Many financing options
  • Some reported issues with customer service
  • Some reported issues with door-to-door sales

Best Technology

Tesla Energy

★★★★★
3.2

  • Price-match guarantee
  • Sleek, efficient, and durable solar panels
  • Best solar battery on the market
  • Some reported issues with customer service
  • Customer service varies by local dealer

See all of the solar companies in Londonderry

Factors that Affect Solar Panel Costs in Londonderry

There are many criteria that can play into your solar panel installation cost, such as the size of your system, the equipment you choose, your financing options and the specific company that installs your solar panels.

Solar Equipment

One of the most important factors to consider when it comes to the cost of installing solar panels is the size of the solar system, which is measured in kilowatts (kW). The more energy your household uses, the larger your system will likely need to be. You can expect to pay around $4,220 per kilowatt in Londonderry.The kind of solar panels and equipment you want is another factor that will significantly influence costs. Solar panels that are more efficient, like monocrystalline panels, tend to be more expensive. Moreover, solar equipment goes beyond just the solar panels themselves. You’ll also need to make decisions about the kind of racks used to mount the panels, inverters, solar batteries, etc. It’s important to take all of this into consideration when looking for a solar system that falls within your budget.

Solar Financing Terms

If paying for a solar system out of pocket is out of reach, solar loans are a solid option because they lower your upfront costs and let you pay for your system over a term of, on average, between five and seven years.It’s wise to add the interest you’ll pay in your final cost estimate. If you can afford to put more money down upfront, you can reduce your total costs and how long it’ll take to pay back the loan.

Solar Panel Installation Company

A final consideration when trying to evaluate the cost of solar for your home or business in Londonderry is the company you hire to install your solar system. As with choosing a company to renovate your kitchen, for example, there are plenty of solar installers that offer a range of services for different budgets.The size of the company can sometimes play the most significant role in the installation costs. Larger national companies, like SunPro and Sunrun, often have lower pricing due to access to greater resources and bulk pricing. Smaller local companies might be more costly, but they generally have better customer service and more customization options, and the occasional sale or discount can bring their pricing down to compete with bigger companies.

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

There are numerous companies available in Londonderry, and some homeowners feel overwhelmed considering their options. Choosing the right company for you can be tough, so here are some tips to help you decide:

  • Warranty: Warranties that cover defective panels and repairs over a long period of time such as 25 years are the best you can get in the business, and offering that kind of warranty is one mark of a quality company.
  • Reputation: Solar companies that have great reviews from their customers and that have been operating for many years in most cases offer high-quality solar panel installation and expertise.
  • Installation Process: Make sure you’re on the same page with the installer with regard to how the installation process will go and what needs to be done before your solar panel system is installed, such as updating your electrical system or roof.
  • Contract: Even though reading through a contract can be tedious, 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.

Best National Provider

SunPower

★★★★★
5.0

  • Most efficient panels on the market
  • National coverage
  • Cradle to Cradle sustainability certification
  • Great warranty coverage
  • Expensive
  • Customer service varies by local dealer

Best for Leasing

Sunrun

★★★★★
4.0

  • Expansive service area
  • Many financing options
  • Some reported issues with customer service
  • Some reported issues with door-to-door sales

Best Technology

Tesla Energy

★★★★★
3.2

  • Price-match guarantee
  • Sleek, efficient, and durable solar panels
  • Best solar battery on the market
  • Some reported issues with customer service
  • Customer service varies by local dealer

EcoWatch's Londonderry, NH Solar Cost FAQs

What is the average cost of installing 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 cost more if you want additional solar equipment or higher quality panels, or if you have above-average energy needs. On the flip side, you can spend less if you opt for a smaller solar panel system or less efficient solar panels.

What other factors should I consider other than cost when buying solar panels?

Cost is certainly one of the most important factors you should consider when buying solar panels, but other important factors include efficiency, durability, and quality.

Is it worth going solar in Londonderry?

Solar panels can be a good investment for most homeowners, but they might not be worth it for everyone. If your home doesn't get enough sunlight and/or your power bills are already fairly low, solar panels might not be for you.

What solar power system size is right for my home?

To figure out how many solar panels you need, you need to know how much energy your home requires and how much sunlight your home gets. For a general estimate, however, since each panel can generally produce about 250 to 400 watt-hours per hour, the average household will need 20 to 35 panels.

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.

Company research was conducted by Melissa Smith and Karsten Neumeister. Local data analysis was conducted by James Savino. See something we missed or could do better? Email the editor.

Follow us