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Top-Rated Solar panel pros in Rosslyn - Updated Nov 2026

Avatar for DAY & NIGHT PLUMBER LLC
DAY & NIGHT PLUMBER LLC
4.8(
94
)
Solar Water Heater System - InstallSolar Water Heater System - Install - For BusinessSolar Water Heater System - Repair+1 more

Serving Rosslyn, VA and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"I emailed Day and Night Plumber after my old water heater started shooting water out the front panel and within 10 minutes I got a phone call from them with an appointment for an estimate with Marin. The quote was very reasonable and after I supplied the Hybrid Water Heater, Marin was able to come install it on Sunday. He was extremely knowledgeable, efficient, and hard working. He finished everything, cleaned up the area, hauled away my old water heater, and showed me how everything worked. He even gave me a military discount and 12 month warranty on labor. If you need a plumber for anything, give Day and Night Plumber a call, they will give you top notch service for a reasonable price."
Additional Photos
Additional Photos
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Additional Photos
Additional Photos

+1

Response time11 hrs
5 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Tesla, Inc
Tesla, Inc
New to Angi
Solar Panel Install

Serving Rosslyn, VA and surrounding areas

Approved (Corporate)

In business since 2015

Free estimates

Warranties offered

Tesla Energy provides an all‑in‑one solar‑plus‑storage solution for your home. Sleek, high‑efficiency solar panels paired with Powerwall help you save on electricity bills and protect your homes from outages. The Tesla app gives you real-time visibility into your energy production, usage and savings—and lets you earn money by supporting the grid through Tesla's Virtual Power Plant. Every system is engineered and installed end‑to‑end by Tesla, delivering a modern aesthetic and the confidence that your home is powered by the most advanced renewable energy ecosystem. With our Price Match Guarantee and exclusive incentives, you can be confident you're getting the best value in home energy.

California Home I
California Home I
California Home I
Texas Home
Texas Home

+3

Avatar for SunPower
SunPower
4.2(
105
)
Solar Panel Install

Serving Rosslyn, VA and surrounding areas

In business since 1985

Free estimates

"I had solar panels installed by SunPower's subcontractor Hooked on Solar in 2020. In 2023 some of the panels were damaged by an electrical outage and surge. It took about 4 months for Hooked on Solar to identify the damaged panels, schedule an appointment to replacement, but finally they fixed the panels."
Coastal SunPower Solar Installation
West Coast SunPower Solar Installation
NorthEastern Solar Installation
Southern Solar Installation
SunVault™ Storage Helps Keep the Lights On

+3

Recommended by84%of homeowners
Nova Solar - 142 Photos - Energy Company -
4.9(
10
)
Solar Panel InstallSolar Panels For Electric System - Repair

Serving Rosslyn, VA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"Nova Solar did a fantastic job from contract signing to installation and follow-up. They were very responsive to questions and answered very promptly. Installation was done in one day and their cleanup was the best of any company I have used the past. In fact, they cleaned up some of the things missed by the roofing company who installed a new roof the day before their installation. If you are thinking of going solar, I highly recommend this company..."
Recommended by100%of homeowners
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Solar Panels FAQs, answered by experts

It’s possible that installing solar panels can lead to mold on the roof. The panels themselves are not the issue. Problems caused by improper installation—such as roof leaks and mounts that aren’t sealed properly—can cause mold. Another potential cause of mold is debris accumulation under panels, which can trap moisture. If you live somewhere with extreme snow, rain, or hail, your home could be more prone to mold.

DIY solar panel installations are hard to manage by yourself. You’ll likely need some help or prior experience to make the project worth the effort.

The average homeowner needs around 22 solar panels, but the exact number depends on your monthly energy consumption. Your solar professional should size your array to offset your consumption, meaning you’ll need fewer panels if you use below-average amounts of electricity, or more than 22 if you use above-average amounts of electricity. The number of panels also depends on the output of each panel. The average is around 400 watts, but you might need more panels if you install less capable equipment. Since there are so many variables, you should have a professional size your system.

Learn about common solar blockers in your area to determine how often you should wash solar panels and the best cleaning method:

  • Soot: If you have a fireplace, soot can disperse and accumulate on the solar panels.

  • Debris, dirt, and leaves: These natural elements require light cleaning. Being close to trees or living in a desert area can cause more of these to accumulate.

  • Pollen: Areas with a high pollen count require more frequent solar panel cleaning, and sticky plant material requires a deeper cleaning.

  • Bird droppings: Bird droppings are binding and more difficult to remove. Keep this in mind if you live near a lot of surrounding trees. 

Rooftop solar panels supply energy to a single household, where a solar farm can power multiple homes at once with clean energy. Residential rooftop solar panels cost more per watt with a lower project total, and those panels only service the residence they are installed on (in most circumstances). With a solar farm, multiple households can buy into the project and share the overall cost.

The Rosslyn, VA homeowners’ guide to solar panel services

From average costs to expert advice, get all the answers you need to get your job done.