Best solar companies California Day One Solar

Day One Solar Reviews

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

309verified installs in California utility records*
39recent installs, 2025-26 records*
2013first year in county records
8.2/10Solar.com Score · 40 reviews analyzed

Solar.com Installer Score for Day One Solar

One score, computed the same way for every installer. We read the full text of all 40 substantive published Day One 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

8.2/10

Synthesized from 40 substantive customer review texts (42 published reviews collected).

Google 4.5★ · 17 reviewsYelp 4.9★ · 25 reviews

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

Read what customers actually say ↓
Sales IntegrityHow clearly and honestly the company explains the system, contract, savings, and incentives before you sign.7.2

5 reviews speak to this · 5 praise · 0 complaints

Price TransparencyHow well the final price, financing terms, and incentive guidance match what customers were led to expect.6.7

10 reviews speak to this · 8 praise · 1 complaints

CommunicationHow reliably the company keeps customers informed and answers questions across sales, installation, and service.7.5

25 reviews speak to this · 24 praise · 1 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.7.1

9 reviews speak to this · 8 praise · 0 complaints

WorkmanshipThe quality, professionalism, neatness, and property care of the physical installation.7.8

30 reviews speak to this · 29 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.7.8

20 reviews speak to this · 18 praise · 2 complaints

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

How does Day One 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 Day One 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.
Santa Cruz County2953920135.4 kW0.0%See county ranking →
Santa Clara County14020149.0 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.

Day One Solar reviews: what customers say

An independent synthesis of published customer feedback across Google and Yelp, updated September 28, 2026. Green marks praise, amber mixed experiences, red complaints.

Sales & proposal integrity

Sales Integrity7.2/10

Reviewers describe the sales and proposal process as clear, collaborative, and aligned with expectations. The available evidence is entirely positive, with comments focused on system design, panel placement, and a low-pressure handoff from planning into installation.Solar.com's composite of published customer feedback, not a customer quote

Clear system design. Reviewers say the proposed systems were designed to match their needs, including difficult roof layouts and higher production goals. Several describe the final design as meeting or exceeding expectations. Representative review excerpt: "Perfect job from start to finish -- system design was for a difficult roof, but worked out great and is producing slightly more than predicted."

Collaborative planning. Reviewers report being able to work through layout decisions collaboratively, which helped improve the final panel placement. This theme suggests a proposal process that left room for customer input. Representative review excerpt: "We collaborated on panel placement, which I liked because we got a better array position than either of us had initially planned."

Single-team experience. Some reviewers appreciated not having to repeat details across multiple handoffs between sales and field teams. That continuity appears to have made expectations easier to manage. Representative review excerpt: "This was important because I did not have to or want to deal with the salesman, then the office manager, then the installation crew etc etc."

Price & financing transparency

Price Transparency6.7/10

Reviewers mostly describe pricing as favorable and often below what they expected. There is also some friction around billing and incentive timing, including a mixed report tied to a delayed refund and a negative report about an unexpected invoice.Solar.com's composite of published customer feedback, not a customer quote

Prices often came in low. Price praise is the dominant pattern in this category. Representative review excerpt: "I got everything I wanted for a price that was under what I'd expected it to cost."

Billing confusion watch-out. One reviewer reported surprise around receiving a bill and described difficulty resolving it. This is the clearest complaint in the category and points to a need for stronger upfront billing clarity. Representative review excerpt: "I finally gave in, even after not knowing they were going to be sending me a bill, and tried to pay the invoice just so they would stop harassing my..."

Incentive timing required follow-up. A mixed review says a rebate-related refund took time to arrive and required persistent follow-up. The delay was attributed to the utility side, but it still affected the customer experience. Representative review excerpt: "While there were delays in receiving our SGIP refund (due to PGE, not Day One), Megan worked with us relentlessly to shake it loose from PGE beaucracy."

Communication & coordination

Communication7.5/10

Reviewers overwhelmingly describe strong communication, prompt responses, and good follow-through across projects and service calls. The evidence includes a small number of negative reports, but those are rare relative to the broader praise for coordination and support.Solar.com's composite of published customer feedback, not a customer quote

Responsive project updates. Reviewers say they were kept informed throughout the project and felt the team communicated clearly from start to finish. This is one of the strongest themes in the feedback. Representative review excerpt: "From start to finish, their communication was excellent, and they kept us informed throughout the entire project."

Helpful post-install support. Several reviewers report that the company responded promptly when issues came up after installation, and that staff were knowledgeable and helpful in resolving them. That pattern extends beyond the original install into service support. Representative review excerpt: "We had a few issues the last two years and Day One Solar responded in a prompt and efficient manner Megan in particular is incredibly knowledgeable, very helpful and responds..."

Rare service complaint. One reviewer described a system not responding after a home purchase, which stands out as the main negative note in this category. It appears to be an isolated complaint rather than the dominant pattern. Representative review excerpt: "I purchased a home with a solid system installed by this company, and the solar system not responding or working."

Timeline reliability

Timeline Reliability7.1/10

Reviewers generally describe schedule management as dependable, with projects often moving from contract to completion on a reasonable timeline. A few comments note delays around inspection scheduling or incentive processing, but those reports are limited and mostly framed as situational.Solar.com's composite of published customer feedback, not a customer quote

Projects often stayed on track. Reviewers say projects moved steadily from first contact to completion, even when the timeline included travel, vacations, or coordination with other contractors. The overall pattern is one of solid schedule management. Representative review excerpt: "From first contact to completion of project was less than three months (and this included delays due to summer travel and vacations) and it took just one month from contract..."

Coordination around other work. Some reviewers describe the team successfully coordinating around roof work and other contractors without derailing the job. That suggests good flexibility when schedules were more complex than usual. Representative review excerpt: "We had a lot of roof work being done at the same time as the solar installation - 3 different contractors besides Day One and they were able to work..."

Occasional timing delays. A mixed review mentions a delayed rebate-related refund and a longer wait for inspection scheduling during mid-COVID conditions. The delay is presented as context-driven, but it still affected the timing experience. Representative review excerpt: "While there were delays in receiving our SGIP refund (due to PGE, not Day One), Megan worked with us relentlessly to shake it loose from PGE beaucracy."

Workmanship & site care

Workmanship7.8/10

Reviewers mostly describe the crews as professional, careful, and willing to solve unusual installation problems. Cleanup and site disruption are not common concerns in the feedback, though there is one strong complaint about an incomplete install.Solar.com's composite of published customer feedback, not a customer quote

Professional install crews. Reviewers say the installation teams handled unusual site conditions quickly and professionally. Several comments point to careful workmanship and a willingness to do the job the right way. Representative review excerpt: "There were lots of unusual things with my install, and they breezed through it quickly and professionally."

Problem-solving on site. Reviewers report that the team persisted through troubleshooting until they identified a solution that fixed the issue. This reflects strong hands-on workmanship when complications arose. Representative review excerpt: "The Day One Solar team worked persistently to identify the problem, finally making the ultimately correct decision to pull new wire from the main panel to the inverter, which solved..."

Isolated quality complaint. One reviewer described an incomplete installation and follow-up charges to finish the work. This is the main workmanship complaint in the available review set. Representative review excerpt: "They charged the owner thousands and thousands of dollars to do an incomplete install that was recommended by the manufacturer just to come out later and charge the home owner..."

Long-term support & performance

Long-Term Support7.8/10

Reviewers report strong post-install support, with many comments about prompt troubleshooting, monitoring, and repair follow-through. Most feedback is positive, though there are a couple of complaints tied to inverter issues and periods of lost generation.Solar.com's composite of published customer feedback, not a customer quote

Prompt troubleshooting support. Reviewers say the company was knowledgeable and effective when diagnosing and fixing system issues after install. Support appears to continue well beyond the original project closeout. Representative review excerpt: "One of my solar panels wasn't functioning, and even though they didn't install the system they were very knowledgeable and prompt and effective in isolating the issue and fixing it."

Persistent repair follow-through. Some reviewers describe the team working through difficult post-install problems until the system was working again. That persistence is a recurring part of the post-install feedback. Representative review excerpt: "The Day One Solar team worked persistently to identify the problem, finally making the ultimately correct decision to pull new wire from the main panel to the inverter, which solved..."

Service gaps can matter. A negative review describes an inverter failure that led to months of lost generation, which is the clearest long-term performance complaint in the set. It shows that equipment issues can have a meaningful impact when they arise. Representative review excerpt: "Our inverter died during the height of Covid and we lost 6 months of generation since well… in 2020 there were plenty of other things to worry about."

Bottom line: Across 40 substantive reviews, DAY ONE SOLAR’s feedback is mostly positive, with especially strong marks for communication, workmanship, and long-term support. The main watch-outs are around pricing/billing clarity and some timing issues tied to refunds or scheduling, while stronger complaints appear to be relatively rare.

How this is built: category scores and summaries weigh the company's full published rating record (17 Google reviews averaging 4.5 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 Day One 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.
2
2013
22
'14
31
'15
21
'16
16
'17
18
'18
16
'19
22
'20
28
'21
39
'22
33
'23
31
'24
32
'25
11
'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 Day One Solar

What do customers say in Day One Solar reviews?

We analyzed 40 substantive published customer reviews of Day One Solar in full. The company's Solar.com Installer Score is 8.2/10, 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 Day One Solar installed?

Day One Solar appears as installer of record on 309+ 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 Day One 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.