Best solar companies California Advanced Conservation Systems

Advanced Conservation Systems Reviews

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

179verified installs in California utility records*
9recent installs, 2025-26 records*
2008first year in county records
7.8/10Solar.com Score · 67 reviews analyzed

Solar.com Installer Score for Advanced Conservation Systems

One score, computed the same way for every installer. We read the full text of all 67 substantive published Advanced Conservation Systems review texts across every platform and measure what customers actually report. Not a survey. Not a sample. Never for sale.

Solar.com Installer Score

7.8/10

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

Synthesized from 67 substantive customer review texts (75 published reviews collected).

Google 4.4★ · 43 reviewsYelp 4.1★ · 32 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.7.0

20 reviews speak to this · 15 praise · 5 complaints

Price TransparencyHow well the final price, financing terms, and incentive guidance match what customers were led to expect.5.6

17 reviews speak to this · 8 praise · 9 complaints

CommunicationHow reliably the company keeps customers informed and answers questions across sales, installation, and service.7.1

30 reviews speak to this · 22 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.7.0

14 reviews speak to this · 10 praise · 4 complaints

WorkmanshipThe quality, professionalism, neatness, and property care of the physical installation.7.2

32 reviews speak to this · 25 praise · 7 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

28 reviews speak to this · 21 praise · 5 complaints

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

How does Advanced Conservation Systems 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 Advanced Conservation Systems 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.
Los Angeles County134920087.6 kW0.0%below ranking floor (under 250 installs)
Kern County28020156.3 kW0.0%below ranking floor (under 250 installs)
San Bernardino County17020156.2 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.

Advanced Conservation Systems 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 Integrity7.0/10

Reviewers often describe ACS as straightforward and attentive during the sales process, with several saying the team took time to explain design choices and tailor proposals. At the same time, a smaller set of complaints points to mismatches between the proposed setup and the installation outcome, along with a few concerns about unexpected pricing changes.Solar.com's composite of published customer feedback, not a customer quote

Clear, tailored proposals. Reviewers say ACS often explains options carefully and recommends solutions based on the home rather than pushing a generic package. Representative review excerpt: "For something that’s a decades-long investment, having a company that’s willing to engineer the right solution instead of selling a one-size-fits-all package made all the difference."

No-pressure consultations. Some reviewers report a low-pressure sales experience with time spent on roof measurements and design walkthroughs. Representative review excerpt: "Their energy consultant, Nash, showed up exactly on time, climbed on the roof to measure shade, and patiently walked me through three design options--no pressure, no gimmicks."

Proposal mismatch watch-out. A few reviewers describe situations where the sold design did not match what installers later said was possible, and others mention pricing expectations shifting after the fact. Representative review excerpt: "They came out and drew up the contract and said the panels were supposed to go on a west facing roof then when the installers arrived said they could not..."

Price & financing transparency

Price Transparency5.6/10

Feedback on pricing and financing is mixed. Some reviewers say the company explained costs and financing clearly up front, while others describe concerns about deposits, billing, service charges, and the timing of final costs or rebates.Solar.com's composite of published customer feedback, not a customer quote

Cost and deposit concerns. Other reviewers mention surprise service charges, unclear start timing after a deposit, or feeling that certain follow-up work was priced high. Representative review excerpt: "I appreciate the work they finally performed but I think people like to have some idea of a start date, especially when a sizable deposit is made."

Up-front financial review. Several reviewers say ACS walked them through bills, financing, and overall economics before they committed. Representative review excerpt: "Before we even committed, they took the time to analyze our electric bill and walk us through the financials, ensuring the investment made sense for us."

Fair financing for some customers. Some reviewers describe the financing and final pricing as reasonable, and a few note better-than-expected payment outcomes. Representative review excerpt: "Their price and financing were fair and I have no hesitation in recommending them."

Communication & coordination

Communication7.1/10

Most reviewers describe ACS as responsive and communicative during design, installation, and follow-up. Still, a minority report delays in callbacks, inconsistent updates, or trouble getting clear next steps when questions came up.Solar.com's composite of published customer feedback, not a customer quote

Responsive project updates. Reviewers frequently say the team kept them informed and answered questions during the project. Representative review excerpt: "They are professional and communicate very well about all the aspects of the project."

Smooth handoffs. Some customers describe prompt follow-up after design finalization and say the crew handled small requests quickly. Representative review excerpt: "Once the design was finalized, the installation moved quickly, and the team was responsive whenever I had questions or requested small follow-ups."

Callback delays. A smaller group reports slow or uneven communication, including waiting for return calls or hearing back only after repeated follow-up. Representative review excerpt: "Update: 5-7-14 I have received a bill for $95.00 (almost a month later..??) I am currently waiting for Ann to return my call."

Timeline reliability

Timeline Reliability7.0/10

Reviewers generally describe ACS as capable of moving projects through design, installation, and inspection at a solid pace. The main complaints involve uncertain start dates and delays in getting an installation window or project update.Solar.com's composite of published customer feedback, not a customer quote

Fast project flow. Some reviewers say design, installation, and inspection moved quickly once the project was underway. Representative review excerpt: "It's such a great experience to have ACS for our solar project, they are doing fast on final designing, installation, and inspection!"

First-try inspection success. A few customers report that the work passed inspection on the first attempt and progressed without major scheduling setbacks. Representative review excerpt: "Conduit runs are ruler-straight; roof flashings are tucked under shingles so neatly that my home inspector called it "

Start-date uncertainty. Other reviewers say they wanted clearer timing after making a deposit or experienced long waits before getting a firm installation date. Representative review excerpt: "I appreciate the work they finally performed but I think people like to have some idea of a start date, especially when a sizable deposit is made."

Workmanship & site care

Workmanship7.2/10

Most reviewers describe solid installation quality, neat work, and respectful treatment of the home. Even so, a minority of reviews mention installation mistakes, damage concerns, or other workmanship problems that required extra attention afterward.Solar.com's composite of published customer feedback, not a customer quote

Neat, professional installs. Reviewers often praise the finish quality, including clean roof work, straight conduit runs, and careful site handling. Representative review excerpt: "Conduit runs are ruler-straight; roof flashings are tucked under shingles so neatly that my home inspector called it "

Careful treatment of the home. Some customers say the crew left little to no mess and completed the job without visible damage. Representative review excerpt: "There was zero damage to our house, and the work was so clean you'd never guess a major installation had just happened."

Installation issues reported. A few reviewers describe serious workmanship concerns, including incorrect installation or damage-related complaints that required follow-up repairs. Representative review excerpt: "So just let me let me recap, the tankless water heater was installed incorrectly which I payed an additional $606.00 to have that fix."

Long-term support & performance

Long-Term Support7.6/10

Post-install feedback is mostly positive, with many reviewers saying systems are producing as expected and that monitoring or app integration works well. There are still some complaints about warranty follow-up, service responsiveness, and defect-related repairs, so support is not uniformly smooth.Solar.com's composite of published customer feedback, not a customer quote

Strong production results. Reviewers say their systems, battery backup, and monthly bills have performed as expected or better after turn-on. Representative review excerpt: "Solar production, battery backup, and the overall system have performed exactly as designed."

Monitoring and app visibility. Some customers highlight useful monitoring and daily production tracking as part of the post-install experience. Representative review excerpt: "Our Tesla solar roof integrates perfectly with the Tesla app, so we can track exactly how much power we're generating daily--it's honestly kind of addictive to watch."

Warranty/service follow-up concerns. A few reviewers report delays or friction when post-install issues needed troubleshooting or repair attention. Representative review excerpt: "They say they are under new ownership but still wont fix their issues ans wanting to charge over $300 dollars for 30 minutes of trouble shooting."

Bottom line: ACS’s review profile is mostly positive, with strongest marks for workmanship and long-term system performance. The most consistent downside is transparency around pricing, deposits, and post-sale follow-through, where several reviewers describe uncertainty or added costs. Communication and scheduling are usually described as solid, but not consistently enough to avoid occasional complaints.

How this is built: category scores and summaries weigh the company's full published rating record (43 Google reviews averaging 4.4 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 Advanced Conservation Systems

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
2008
1
'10
13
'15
14
'16
7
'17
7
'18
9
'19
13
'20
39
'21
24
'22
34
'23
15
'24
6
'25
3
'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 Advanced Conservation Systems

What do customers say in Advanced Conservation Systems reviews?

We analyzed 67 substantive published customer reviews of Advanced Conservation Systems in full. The company's Solar.com Installer Score is 7.8/10, 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 Advanced Conservation Systems installed?

Advanced Conservation Systems appears as installer of record on 179+ 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 Advanced Conservation Systems' 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.