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Business ProfileSolar Companies in Danville, California

NorthStar Solar Inc

Listed in Danville 4.70 (50 reviews)

NorthStar Solar Inc

NorthStar Solar Inc designs and builds home energy solutions spanning solar, battery backup, roofing and EV charging. Based in Danville, it serves homeowners across the Bay Area and Central Valley and completes installations in-house.

Last Updated October 2, 2026.

Business Highlights
  • NorthStar Solar lists C-46 Solar and General B Construction licenses.
  • NorthStar Solar completes installations in-house rather than outsourcing them.
  • NorthStar Solar offers 50-year roof warranties and 25-year solar panel warranties.
  • NorthStar Solar identifies as a Certified CertainTeed SELECT ShingleMaster contractor.

Service Area

Bay Area and Central Valley.

Active Business Listing

NorthStar Solar Inc is one of 7 solar companies ProsGrade lists in Danville, California.

Active
Public local listing
Listing details

6 services listed, including Solar panel system design and installation, Battery backup and energy storage and Residential roofing. Open 7 days a week. Rated 4.7 from 50 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How NorthStar Solar Inc compares with the other 6 solar companies on ProsGrade in Danville, using public Google ratings and review counts.

  • Has more Google reviews (50) than 4 of the 6 other Danville solar companies on ProsGrade.
  • One of 4 Danville solar companies on ProsGrade rated 4.7 or higher from at least 10 reviews.

Services Covered

6 services
  • Solar panel system design and installationCustom systems engineered for each home
  • Battery backup and energy storageTesla Powerwall 3
  • Residential roofingAsphalt shingles, leak repairs, full replacements and pre-solar inspections
  • Roof-and-solar bundlesCombined projects for homes needing roof work and solar
  • EV charger installation
  • Home energy assessments and consultationsEnergy use, roof condition, sun exposure and homeowner goals

Reviews

What customers say

Several customers praise the crews’ efficient, careful work and clear communication. One customer recalls being kept informed by a project manager at every step; another says the crew repaired or replaced cracked roof tiles at no added charge before installation.

Customer Reviews

John Saboe

I never write reviews, but NorthStar Solar truly earned it. After soliciting multiple bids, Patrick stood out right away - he took the time to do a Zoom call to understand my property and my goals instead of just emailing a quote. Once I moved forward, Jason was assigned as my project manager and kept me informed every step of the way. The install crew was on-time, super efficient, and meticulous - clearly professionals who also understand roofing. They were careful about panel/battery placement and stud alignment, and at the end they even painted all the new conduits to match our house colors. Danielle in the office was also fantastic - super communicative and helpful throughout the process. From start to finish, everything was handled with precision and care. NorthStar Solar exceeded my expectations in every way!
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Kam Chan

I had a solar system installed by Northstar Solar this past winter, and I am thoroughly impressed with their service. I obtained several bids from different companies, Northstar Solar's bid stood out as very competitive and comprehensive. They installed REC solar panels and Tesla Powerwall 3 batteries at my home. While the sales quote was brief, the system design, and permit filing were all done meticulously. The entire installation process was seamless. From the initial consultation with Patrick in sales, a virtual meeting with the Company Owner Ryan, to the clear communications from Office Manager Dani, everything was handled professionally and with attention to detail. I am particularly impressed by the installation crew, Jason, Rodrigo, Jose, Juan, and Kyle. They were true professionals. They were polite, worked efficiently, and left the worksite spotless. The solar panels were installed nicely on our concrete tile roof; the batteries and cable conduits were mounted with near perfection. I am very happy with how the system turned out. I would have liked to have the string mapping available to me prior to or immediately after the installation. Nonetheless, I eventually received a copy of the string map. Northstar Solar not only specializes in Solar systems, they are also roofing experts. Just prior to the installation, they found a couple of cracked tiles on the roof, and they repaired or replaced them with no additional charge. I was thankful to learn that. After the installation, we have had several Inspections and Re-inspections by the City inspectors. The re-inspections were not due to Northstar Solar’s work, they were mostly due to the Inspectors’ incomplete inspection each time, as well as trying to enforce ordinance that did not apply. While I was glad that Northstar Solar sent a representative to meet with the Inspector each time, I wish they had given me more advanced notice so that I didn’t have to make sudden changes in the last minute to my schedule. The system have been working well, and it continues to supply more electricity to our home each day going from the winter months to spring. I highly recommend Northstar Solar for anyone considering installing a solar system. Their competitive pricing, professional service, and excellent installation make them a top choice.
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Ron EtherealPixels

I recently had NorthStar Solar remove 28 solar panels for a roofing job, and then reinstall them once the roof was completed. They were professional and competent from start to finish. Too many companies over-commit and under-deliver. That was never the case with anyone from NorthStar Solar. Every touch point with their business was professional, and they always followed through on their commitments. I was very concerned about them reinstalling my solar panels once my roof job was completed, due to the summer's high temps and the potential damage that could be done to the new shingles. Dan, the owner, made sure that the crew started early in the morning and quit for the day before the temps got to the point where the roof could sustain damage. The panels were installed flawlessly and on-time. It is always a pleasure doing business with people who care and are sincere about the quality of their work and the commitments they make to customers. Northstar Solar gets an A+++++ !!!!
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dpraklet

Overall great experience with Northstar Solar from start to finish. They provide a quality product and install. The entire team is very responsive and knowledgeable. I decided to go with them because of a friend that used the same company. He had nothing, but good things to say and I can see why.
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eitan katznelson

We used NorthStar solar to install 12KW solar system with a 20KW battery to backup our entire home in February of 2021. The process was super easy, and Ryan walked us through the quote over VC to make sure that we understood all the options and tradeoffs. We set up an installation time frame, and a few weeks before the window, the dates were finalized. The installation took 3 days and we only lost the power for a few of hours when the switchover happened. Since then we have not been affected by any of the outages in our area planned or unplanned. They handled all the bureaucratic details including the permitting and all interactions with PG&E. The only issue we encountered was the Enphase controller panel was defective. This was discovered at installation time when testing running the house on batteries and there was a buzzing sound coming from the panel. NorthStar got on the the phone with Enphase and got a new panel shipped once it was diagnosed to be defective. I lied above, there was another brief power outage when the panel was replaced. Finally, their quote came in 10% lower than other local solar companies. As you can see, we have nothing but positive things to say.
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Frequently Asked Questions

How long does NorthStar Solar take to install a home battery?

Installation typically takes 1–2 days, with very little disruption to the household routine.

Can NorthStar Solar add battery storage without solar panels?

Solar panels are not always required; pairing a battery with solar offers stronger performance and greater savings.

What solar financing options does NorthStar Solar offer?

Options include cash purchase, PACE financing through property taxes, solar loans and solar leases.