Skip to content
Solar Installer GuildUnited States · independent

Advanced Conservation Systems, Inc.

Solar energy company · Lancaster, CA

What the listing shows you

4.4★

43 Google reviews

What it doesn’t

12%

rated 1–2★

typical in Lancaster, 10%

Newest review held

Aug 2026

newest held review this month

Google's rating breakdown · all 43 reviews

Rated 1–2★
12%
typical in Lancaster, 10%
Posted an update
3 weeks ago
the company posting to its own Google profile
Replies to reviewers
28%
of the 43 reviews we hold

Its one and two star share is 2 points above the typical installer in Lancaster. Across California, 391 of the 1,529 installers whose breakdown Google has published carry a higher share than this one.

The percentages are Google’s own arithmetic over every review it holds, not a sample we assembled. Separately we hold 43 review texts for this company, quoted below. Google publishes review ages rather than dates, so every date here is approximate.

Every company we hold in Lancaster, on one axis

0% rated 1–2★30%

Each mark is one company we hold in Lancaster whose Google breakdown has been read, placed by its share of one and two star reviews. Advanced Conservation Systems, Inc. is the red one. The amber line is the middle of that set, which includes suppliers and maintenance businesses as well as installers.

What reviewers said

  • 1★ · around October 2025

    Worst decision ever. I wish I never would have answered the door when they knocked. They promised no electric bill and never mentioned that I would not have enough panels to power my house. Never mentioned they don't sell you enough batteries to store power for your home. The best part is they forgot to mention that now on top of my NORMAL power bill I still have to pay monthly that once a year I get an additional $1,800 bill from Edison for having solar! So in trying to get rid of an $800 a month power bill in the summer I have the same power bill plus the $500 solar payments and the $1,800 i

  • 1★ · around August 2024

    Completely botched the project on our house back in 2022. Debris left all over my property, stucco job had to be redone, and flooding through my roof into the garage. Neighbor was going to be a customer of theirs as well when he saw additional solar being installed on my house, but when they saw the stucco job after the electric panel was replaced, they said, "Noooooo way."

  • 1★ · around August 2023

    Horrible service. The unit they installed has had issues every year. Had to have an independent solar guy come fix the botched install. Almost caused a fire on my roof from bad installation. 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. They charge more then my attorney.

  • 3★ · around August 2019 · the company replied

    I had an ACS solar system installed with my pool years ago. We hit 9 degree's a few winters ago and a leak developed. ACS came out and fixed the leak. Their service has been great. Here is an example of solar temps "I gained "12 degree's" an "hour" in my "SPA" yesterday using my ACS system (4-6-14). The temps were as follows: outside temp 65 degrees, the pool temp was 56 degrees before activating solar at 10:00 am. By 1:30 (with the outside temp being 76 degrees) my spa was at 96 degrees using nothing but solar heat In the summer on a hot day I can gain 8 degrees in my "pool" easily..but I can

  • 5★ · around August 2026

    After several months of using my solar and battery system, I can confidently recommend ACS. I spoke with multiple solar companies before making my decision. Some told me what I wanted wasn’t possible, while others seemed focused on selling whatever equipment they had available. ACS took a completely different approach. My project had very specific technical requirements around system sizing, whole-home backup, battery capacity, equipment selection, and long-term reliability. The ACS team spent weeks working through numerous design iterations with me before we finalized the system. They were pa

  • 5★ · around August 2026

    This is a very honest and extremely reasonable company. John and Joseph are patient, honest and very thorough. They are professional and communicate very well about all the aspects of the project. I would trust them with any solar, battery, electrical panel or any electrical work. Definitely highly recommend.

  • 5★ · around July 2026

    I wanted to take the time to think ACS for the Solar system they installed. It’s been working now for a few months, but my bill has been night and day. Last year, my 2025 June electricity bill was $478.26. This year my June Electricity bill is $39.26. I saved $439 just in one month. This kind of savings is incredible. I am so thankful that I decided on the Solar Panels from ACS. Thank you, for the tremendous job you did. God bless.

Reviewer names are not published here. Negative reviews are shown first because they are the ones a listing hides, not because they are more representative.

What reviewers keep mentioning

  • contract 3
  • installers 3
  • solar project 3
  • customer care 2
  • fast completion 2
  • financing payment 2
  • clear communication 2
  • fast installation 2
  • flexible scheduling 2
  • backup battery installation 2

Topics Google derives from the review text, with how often each appears. A frequent topic is not a good one: “price” turns up in praise and in complaints alike.

What the company says about itself

Taken from its own website. We have not checked any of it, and a sentence on a website is not evidence.

    Its website also mentions free estimate, but not in a sentence we can quote cleanly.

    When they say they are open

    Sunday
    Closed
    Monday
    8 AM to 4 PM
    Tuesday
    8 AM to 4 PM
    Wednesday
    8 AM to 4 PM
    Thursday
    8 AM to 4 PM
    Friday
    8 AM to 4 PM
    Saturday
    Closed

    As Google published them when we last read the listing, not a live check. Ring before you drive anywhere.

    Who Google shows alongside them

    Google’s own “people also viewed” set, in Google’s order. It is Google’s comparison, not ours.

    Other installers around Lancaster

    1–2★3★4★5★gauge 0–20%typical here, 10%

    Ordered by how much we can tell you about each, which is not an order of quality. We do not know which of these is better and would not say if we did.

    What we don't know

    • The date above is the newest review we hold, which is not necessarily the newest that exists — we hold a large share of Google's reviews, not all of them.
    • We do not verify licences, insurance or bonding. Nothing here has been checked against a state licensing board.
    • We cannot tell you what an installation costs, and we hold nothing about the equipment they fit.

    Something wrong here? Tell us and a person will read it.

    Do you run Advanced Conservation Systems, Inc.?

    Claim this listing to become its verified contact: correct your own phone number, hours and description, and hear first if anything here changes. Free, reviewed by a person — and it changes nothing about the numbers.

    Claim this listing