Best solar companies California Nippon Energy

Nippon Energy Reviews

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

161verified installs in California utility records*
11recent installs, 2025-26 records*
2014first year in county records
8.2/10Solar.com Score · 68 reviews analyzed

Solar.com Installer Score for Nippon Energy

One score, computed the same way for every installer. We read the full text of all 68 substantive published Nippon Energy 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

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

Synthesized from 68 substantive customer review texts.

Google 4.6★ · 31 reviewsYelp 4.9★ · 37 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.9.9

recency-weighted star ratings across platforms

Sales IntegrityHow clearly and honestly the company explains the system, contract, savings, and incentives before you sign.7.5

36 reviews speak to this · 33 praise · 3 complaints

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

18 reviews speak to this · 13 praise · 5 complaints

CommunicationHow reliably the company keeps customers informed and answers questions across sales, installation, and service.7.9

41 reviews speak to this · 38 praise · 3 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.7.3

22 reviews speak to this · 21 praise · 1 complaints

WorkmanshipThe quality, professionalism, neatness, and property care of the physical installation.7.7

25 reviews speak to this · 24 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.7.6

23 reviews speak to this · 21 praise · 2 complaints

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

How does Nippon Energy 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 Nippon Energy 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.
San Bernardino County107620157.9 kW0.0%below ranking floor (under 250 installs)
Los Angeles County31220148.4 kW0.0%below ranking floor (under 250 installs)
Orange County23320156.2 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.

Nippon Energy 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 Integrity7.5/10

Reviewers most often describe the sales process as clear, helpful, and well explained. A smaller set of complaints mentions process or fee concerns, but the overall pattern is positive with good proposal guidance and responsive follow-up.Solar.com's composite of published customer feedback, not a customer quote

Helpful sales guidance. Reviewers say the sales rep was knowledgeable, offered options, and stayed available to answer questions after installation. Several descriptions also note timely quotes and practical guidance around whether solar made sense for the home. Representative review excerpt: "The Sales Rep Linda was very knowledgeable and helpful during the entire process, and has been available to address any concerns I have had since the installation was complete."

Clear proposal options. Customers describe receiving quotes in a timely manner and being offered different options. That comes through as a generally organized proposal process rather than a high-pressure pitch. Representative review excerpt: "A quote for solar was received in a timely manner and I was offered different options."

Process and fee concern. A small number of reviews report confusion or dissatisfaction with the process and fees. These comments are present, but they are less common than the positive feedback on sales clarity. Representative review excerpt: "Lied about the process and fees, and now will not return my calls."

Price & financing transparency

Price Transparency6.7/10

Feedback on pricing and financing is mixed. Many reviewers describe good pricing, helpful financing support, and a clear fit between the quoted plan and the work performed, while a smaller set raises concerns about charges, deposits, or fee expectations.Solar.com's composite of published customer feedback, not a customer quote

Good pricing and financing help. Reviewers say pricing was reasonable and that the team helped secure financing that worked for them. Some also mention support with related project costs in a way that felt manageable. Representative review excerpt: "They were very communicative, answered all my questions, got me the best financing deal, and my system is producing the energy for my needs."

Reasonable overall value. Several customers describe the quote as favorable and the pricing as better than expected. These reviews often connect the price experience with solid project handling and completed work. Representative review excerpt: "Pricing was good (much better than Sunrun) and they helped with getting a re-roof at a reasonable price before the panels were installed."

Charge concerns. A smaller set of reviewers report concern about added charges or upfront payment expectations, including a request for a fee before someone would come out to inspect a problem. That makes this category feel less consistent than the overall star score suggests. Representative review excerpt: "Can't get these guys to even come out and look at the problem without $500."

Communication & coordination

Communication7.9/10

Communication is one of the stronger parts of the review set. Reviewers frequently say the team was responsive, returned calls quickly, and helped coordinate across permitting and utility steps, with only a few complaints about follow-up.Solar.com's composite of published customer feedback, not a customer quote

Responsive follow-up. Customers often say calls were answered or returned quickly and that the team stayed available throughout the process. Several reviews specifically praise ongoing access to a named contact after the sale and installation. Representative review excerpt: "They always answered calls or returned them fast."

Hands-on coordination. Reviewers describe the company taking ownership of county and utility coordination, including drawings, engineering, and approvals. That level of handoff support appears repeatedly in the positive feedback. Representative review excerpt: "Nippon came in, took charge in replacing bad wiring, worked with the County and SCE for drawing, engineering, and inspection approvals, and even added in a Powerwall -- all for..."

Missed follow-up in a few cases. A few reviews report difficulty getting callbacks or getting questions addressed after initial contact. Those complaints are limited, but they do show that communication was not perfect across every job. Representative review excerpt: "Lied about the process and fees, and now will not return my calls."

Timeline reliability

Timeline Reliability7.3/10

Timeline feedback is mostly positive, especially around permit handling and resolving post-install issues. Still, there are isolated complaints about delayed repair follow-up, so this area reads as solid but not flawless.Solar.com's composite of published customer feedback, not a customer quote

Permit and approval progress. Reviewers describe the team moving projects through county and utility approval steps and resolving permitting issues that came up during or after installation. That suggests decent control over the administrative side of the timeline. Representative review excerpt: "Nippon came in, took charge in replacing bad wiring, worked with the County and SCE for drawing, engineering, and inspection approvals, and even added in a Powerwall -- all for..."

Quick fixes when issues arose. Some customers say the company handled complications quickly and effectively, including post-installation adjustments. These reviews point to a capable response when the schedule needed to change. Representative review excerpt: "Boss naveen was also a lot of help there was couple of issues in the installation and he solved them in a quick and effective way."

Repair timing complaint. One reviewer reports difficulty getting the company to come back out for repair work after the system had already been installed. It is not a widespread pattern, but it is the main watch-out in this category. Representative review excerpt: "I had solar installed and now can't them to come out to do repair work."

Workmanship & site care

Workmanship7.7/10

Most workmanship comments are favorable and describe professional crews, clean execution, and solid handling of more complicated installs. The review set does include an isolated concern, so this category is positive overall but with a small cautionary note.Solar.com's composite of published customer feedback, not a customer quote

Professional install crews. Reviewers say the workers were professional, friendly, and helpful on site. This is reinforced by comments that the crew handled the install smoothly and stayed engaged through the job. Representative review excerpt: "When they showed up to install the system, the workers were professional, friendly, and happy to help."

Handled complex roof work. Some customers describe more complicated installations, including roof retrofit work, being completed successfully. Those reviews suggest the crews were comfortable working through site-specific challenges. Representative review excerpt: "We ended up having a slightly more complicated installation and needed to retrofit our roof due to our existing metal tiles."

Isolated criticism. There is at least one negative review tied to the workmanship-related experience, but it is not a dominant theme in the evidence set. The broader pattern still leans positive on site conduct and installation quality. Representative review excerpt: "He will tell you if solar will benefit you, if it won't, or if you can not go wrong either by getting them or not."

Long-term support & performance

Long-Term Support7.6/10

Post-install support is generally described positively, with reviewers saying the company helped troubleshoot issues, worked on inverter replacements, and stayed involved after turn-on. A couple of complaints about repair follow-up keep this from reading as uniformly strong, but the balance still leans favorable.Solar.com's composite of published customer feedback, not a customer quote

Troubleshooting and repair help. Reviewers say the team came back to troubleshoot issues and got systems working properly again. This suggests active post-install support rather than leaving customers on their own after activation. Representative review excerpt: "She came out and troubleshoot the system and got it working."

Help with inverter issues. Some customers describe the company coordinating with equipment providers to replace faulty components and restore performance. That kind of hands-on warranty support appears in several positive reviews. Representative review excerpt: "Nippon Energy were very responsible and when they found the issue as the inverter then did all the work with Solar Edge to get a replacement inverter sent out."

Repair follow-up complaint. A small number of reviews report difficulty getting repair help after installation. These complaints are limited, but they are the main reason this category is not fully clean. Representative review excerpt: "I had solar installed and now can't them to come out to do repair work."

Bottom line: Nippon Energy’s review profile is broadly positive, with especially strong marks for communication, sales guidance, and post-install involvement. The main recurring cautions are around pricing/fee clarity and occasional delays or difficulty getting follow-up repair support. Overall, the evidence points to a company that many reviewers felt handled projects well, while a smaller set reported problems after the initial sale or install.

How this is built: category scores and summaries weigh the company's full published rating record (31 Google reviews averaging 4.6 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 Nippon Energy

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.
1
2014
3
'15
16
'16
19
'17
24
'18
19
'19
14
'20
19
'21
20
'22
29
'23
10
'24
10
'25
2
'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 Nippon Energy

What do customers say in Nippon Energy reviews?

We analyzed 68 substantive published customer reviews of Nippon Energy 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 Nippon Energy installed?

Nippon Energy appears as installer of record on 161+ 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 Nippon Energy'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.