Best solar companies California Northstar Solar

Northstar Solar Reviews

Based in Danville, CA. This profile is built from public installation records and published ratings, not paid placement.

479verified installs in California utility records*
38recent installs, 2025-26 records*
2019first year in county records
8.6/10Solar.com Score · 166 reviews analyzed

Solar.com Installer Score for Northstar Solar

One score, computed the same way for every installer. We read the full text of all 166 substantive published Northstar Solar review texts across every platform and measure what customers actually report. Not a survey. Not a sample. Never for sale.

Solar.com Installer Score

8.6/10

Blends the six category scores (70%) with the recency-weighted star record (30%).

Synthesized from 166 substantive customer review texts (176 published reviews collected).

Google 4.7★ · 50 reviewsYelp 4.8★ · 126 reviews

Updated September 28, 2026 · No installer can pay to change this score · How scores work →

Read what customers actually say ↓
Review star recordRecency-weighted star ratings across platforms, converted to a 0-10 signal before it is blended into the headline Solar.com Score.9.7

recency-weighted star ratings across platforms

Sales IntegrityHow clearly and honestly the company explains the system, contract, savings, and incentives before you sign.7.7

98 reviews speak to this · 92 praise · 6 complaints

Price TransparencyHow well the final price, financing terms, and incentive guidance match what customers were led to expect.7.1

40 reviews speak to this · 35 praise · 5 complaints

CommunicationHow reliably the company keeps customers informed and answers questions across sales, installation, and service.8.4

119 reviews speak to this · 111 praise · 8 complaints

Timeline ReliabilityHow well the company manages the path from contract through permits, installation, inspection, and turn-on — without the customer having to chase it.7.9

92 reviews speak to this · 86 praise · 3 complaints

WorkmanshipThe quality, professionalism, neatness, and property care of the physical installation.9.1

108 reviews speak to this · 107 praise · 1 complaints

Long-Term SupportHow well the system performs after turn-on, how the company handles monitoring, warranty claims, and service calls — and its staying power to honor them.8.5

40 reviews speak to this · 38 praise · 0 complaints

#45 of 678 scored in California by Solar.com Installer Score

How does Northstar Solar compare where you live? Rankings are local; an installer that leads one city can trail in the next. See how they rank in your city →

Why this differs from star ratings: most five-star reviews say “great company” and stop, and star averages reward that. These category scores only count reviews with concrete evidence, weighted by recency and the reviewer’s track record. A company can hold a strong star average while specific categories score lower; that gap is usually where the real story is. Categories with more complaints than praise are the questions worth asking any bidder, not necessarily dealbreakers.

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Where Northstar Solar builds

County-by-county activity from CPUC records through May 2026.

What this data covers: *Counts on this page, including the totals up top, come from investor-owned-utility interconnection records (SCE, SDG&E, PG&E). Work in municipal-utility territory, such as LADWP or city utilities, and outside California does not appear here, so this company's true totals are higher than shown. Unlike the county rankings, this profile also shows counties below the 250-install ranking floor.

CountyVerified installsRecent 2025-26Active sinceMedian system% leasedCounty rankingLink to the county ranking page. This company's rank on this page is its Solar.com Installer Score rank, shown above.
Contra Costa County2342020197.8 kW0.0%below ranking floor (under 250 installs)
Alameda County1541420196.3 kW0.6%below ranking floor (under 250 installs)
San Mateo County51420207.8 kW0.0%below ranking floor (under 250 installs)
Santa Clara County21020216.8 kW0.0%below ranking floor (under 250 installs)
San Joaquin County19020198.1 kW0.0%below ranking floor (under 250 installs)

% leased counts systems recorded as third party owned (lease or power purchase agreement); the remainder are customer owned. Median system size is the middle system this company installed in that county. Star ratings and review counts are from Google.

Northstar Solar reviews: what customers say

An independent synthesis of published customer feedback across Google and Yelp, updated September 23, 2026. Green marks praise, amber mixed experiences, red complaints.

Sales & proposal integrity

Sales Integrity7.7/10

Reviewers most often describe the sales process as clear, patient, and low-pressure, with proposals that were explained in detail. A small set of complaints points to contract expectations, sales pressure, and a few cases where customers felt the quoted scope or follow-through did not match what they expected.Solar.com's composite of published customer feedback, not a customer quote

Clear, patient proposal process. Many reviewers say the sales team took time to answer questions, explain the proposal, and walk through the process without pressure. Representative review excerpt: "Patrick was very patient in answering all my questions and was quite thorough in reviewing his proposal."

Responsive and helpful sales conversations. Customers also describe the sales experience as thorough and easy to understand, with prompt follow-up and practical guidance. Representative review excerpt: "Our salesman, Patrick was no pressure, extremely helpful and very responsive."

Watch-out on expectations and follow-through. A smaller group reports problems with promised timelines, contract expectations, or feeling pushed into signing before all details were settled. Representative review excerpt: "I contacted them back in September and was pushed to signed a contract with them in October and was promised by Sean that the work will be done by the..."

Price & financing transparency

Price Transparency7.1/10

Feedback on pricing and financing is generally favorable, but less consistent than the sales and installation categories. Reviewers often say pricing was explained clearly, while a handful mention added costs, billing issues, refund concerns, or incentive timing complications.Solar.com's composite of published customer feedback, not a customer quote

Clear pricing in many reviews. Several reviewers say they understood the pricing and financing structure and felt the company was upfront about costs during the sales process. Representative review excerpt: "They were clear about timings and pricing throughout, were patient in explaining every part of the process and how we could make a good decisions about our system, and were..."

Helpful handling of billing issues. Some customers note that minor billing or materials issues were resolved quickly once raised. Representative review excerpt: "Had minor issues with billing and roof materials which they handled immediately."

Some reports of added costs or financing frustration. A smaller set of reviewers describe surprise costs, follow-up around quotes, or frustration tied to loans and project delays after financing had already started. Representative review excerpt: "I took a loan specifically for that walk and started paying the loan back, including the interest, but the walk was never done."

Communication & coordination

Communication8.4/10

Most reviewers describe strong responsiveness, clear handoffs, and steady project management from office staff and field teams. The main complaints center on spotty updates, difficulty reaching staff at times, and a few cases where customers felt project details or timing were not clearly confirmed.Solar.com's composite of published customer feedback, not a customer quote

Responsive project management. Many reviewers say the office and project managers stayed in touch and kept them updated through text, email, or direct follow-up. Representative review excerpt: "Jason, the project manager, was responsive and kept me informed via texts and emails."

Supportive handoffs and coordination. Customers also mention helpful office staff and a project team that stayed engaged throughout the job. Representative review excerpt: "Danielle in the office was a joy and our project manager Jason was there for us all along the way."

Occasional communication gaps. A smaller number of reviewers report unclear updates, difficulty getting confirmation on details, or delays in getting answers from the office. Representative review excerpt: "Their main phone line even states they don't answer calls and prefer to be contacted by text only, which makes communication difficult."

Timeline reliability

Timeline Reliability7.9/10

Reviewers generally report that projects moved forward on schedule or with manageable permitting steps. At the same time, some comments point to delays tied to permits, seasonal timing, or expectations that were too optimistic for the actual schedule.Solar.com's composite of published customer feedback, not a customer quote

Often on schedule. Many customers say the project was completed as planned, with permitting and activation moving smoothly. Representative review excerpt: "The project was done on schedule and permitting process was smooth."

Permitting and install steps often handled well. Reviewers also describe on-time crews and a process that stayed organized once work was underway. Representative review excerpt: "Dan and the rest of the crew were on time and always courteous, answering all our questions."

Some timing expectations were off. A smaller set of reviews says the schedule took longer than expected or that timeline expectations were not communicated clearly after the contract was signed. Representative review excerpt: "Finally, after asking to talk to the owner, the owner called me back in the end of December and told me nobody should've promised me anything in terms of timeline.."

Workmanship & site care

Workmanship9.1/10

Workmanship is one of Northstar Solar’s strongest areas in the review corpus. Reviewers consistently praise the crews’ professionalism, the quality of the install, and the care taken on the roof and around the home, with only one notable complaint about roof compatibility and install limitations.Solar.com's composite of published customer feedback, not a customer quote

Professional, well-run install crews. Customers frequently describe the crews as professional, personable, and efficient during the installation. Representative review excerpt: "The crew was professional and personable."

Strong install quality and site care. Reviewers also say panels, batteries, and conduits were installed neatly, with careful attention to the roof and surrounding property. Representative review excerpt: "The solar panels were installed nicely on our concrete tile roof; the batteries and cable conduits were mounted with near perfection."

One limitation raised on roof type. A small number of comments mention roof or tile compatibility as a constraint during installation planning. Representative review excerpt: "We were told by the company that our tiles were too old to install panels on and that they didn't do cement tile installation, and so this contributed to us..."

Long-term support & performance

Long-Term Support8.5/10

Post-install feedback is mostly positive, with reviewers saying systems are producing well and follow-up support has been available when needed. A couple of mixed comments note that performance may not always match every customer’s expectations, even when the system is operating without issues.Solar.com's composite of published customer feedback, not a customer quote

Systems generally working well. Reviewers say their systems have continued producing electricity and, in some cases, battery backup has been especially useful. Representative review excerpt: "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."

Follow-up support after turn-on. Some customers report reaching out after installation and getting help when an issue came up, such as a string stopping production. Representative review excerpt: "I had an issue with one of the string's stopping producing, so I reached out and let Northstar know."

A few performance expectations not fully met. A small number of reviewers say the system has run without issues but still seemed to underperform relative to their expectations. Representative review excerpt: "Since the solar system went live after October 14, 2024, I haven't experienced any issues, but it does seem that the power isn't quite sufficient."

Bottom line: Across 166 substantive reviews, Northstar Solar earns an overall 8.6/10 installer score, with especially strong feedback on workmanship and generally positive marks in communication, sales, and post-install support. The main watch-outs are pricing transparency, occasional schedule slippage, and a small number of complaints about timeline expectations or added project costs.

How this is built: category scores and summaries weigh the company's full published rating record (50 Google reviews averaging 4.7 stars), the most recent and most relevant review texts, and recurring feedback themes verified acrossGoogle and Yelp. Ratings and review excerpts from published review sources. Refreshed as new feedback is published. No installer can pay to change it.

About Northstar Solar

Company background from published business information and licensing records.

Products

Solar

Service area

California. Note: the install counts on this page cover California investor-owned-utility records only.

Work for this company or see something out of date? Profiles can be claimed and corrected: contact partners@solar.com. Placement on solar.com is never for sale.

Recorded installs by year

Residential interconnections statewide in PG&E, SCE, and SDG&E records through May 2026.
16
2019
34
'20
42
'21
99
'22
190
'23
71
'24
23
'25
16
'26

Important context: this chart shows investor-owned-utility records only. Companies that shift work toward municipal-utility territory (LADWP and city power departments) or other states will show declining bars here even while building steadily elsewhere, and 2025-26 records also lag real installation dates. Treat this as a partial window, not the company's full trajectory.

FAQ about Northstar Solar

What do customers say in Northstar Solar reviews?

We analyzed 166 substantive published customer reviews of Northstar Solar in full. The company's Solar.com Installer Score is 8.6/10, with category-level detail on this page covering sales integrity, price transparency, communication, timeline reliability, workmanship, and long-term support.

How many solar systems has Northstar Solar installed?

Northstar Solar appears as installer of record on 479+ residential systems in California investor-owned-utility interconnection records through May 2026. Work in municipal-utility territory or other states does not appear in those public records.

How can I compare Northstar Solar's pricing?

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How we built this data

Methodology: Counts are residential PV interconnections in investor-owned-utility territory (PG&E, SCE, SDG&E) per CPUC Rule 21 public records through May 2026. Postal and name variants are merged. Municipal utility territory such as LADWP, Glendale, Pasadena, Burbank, Anaheim, and Riverside Public Utilities is not included in those CPUC counts. Counts show recorded installations, not quality ratings. Reported costs are self-reported on owned-system interconnections. No installer can pay for placement.

Who we are: Solar.com is a solar marketplace — we connect homeowners with installers and earn a fee when projects move forward. These rankings and scores are computed from public installation records and published customer reviews. No installer can pay for placement, and no installer — including those we work with — can pay to change a score.