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Advanced Conservation Systems is a gamble you shouldn't take. One homeowner discovered toxic gas spewing into their garage from a botched water-heater install, then paid $606 out of pocket to fix it while the company ghosted their calls and held onto rebate paperwork worth $1,000. Another watched water gush down their roof from a brand-new pool system, only to be told they'd wait behind 10 other emergencies for a Friday-only house call. We found a troubling split in the data. While 30 reviewers praised the installation crew's workmanship, 12 others flagged serious quality problems, including flooding through a roof, stucco left unfinished for over a year, and appliances damaged by power surges. Communication fared even worse. Responses arrive late or not at all, and when problems surface, customers describe being passed around with no one taking ownership. One reviewer spent two months trying to reach anyone at the company about removing panels for a roof replacement and never heard back. If reliability and accountability matter to you (and they should), keep shopping.
If you're willing to risk contractors who leave holes in your stucco for 12 months and ignore your calls when their work goes wrong, go ahead. But we'd recommend exploring installers with consistent follow-through and fewer repair horror stories.
Anderson B. contracted the company in August 2021 to install rooftop electric panels, pool‑heating panels, and a tankless water heater at his home. When the crew finished, he discovered the tankless unit had been installed with its exhaust pipe exposed, venting toxic gas into his car garage. He hired a licensed plumber to correct the installation and paid $606 out of pocket. The installer never provided invoices for the equipment, so he could not claim a $1,000 SoCalGas rebate; by the time he pursued the paperwork the rebate window had closed. The company stopped answering his phone calls and emails while he continued requesting reimbursement and the missing invoices. The bottom line: he ended up with an emergency repair bill, a lost $1,000 rebate, no equipment invoices, and no response from the installer.
Chris A hired the company in 2022 for a residential solar install and ended up with a project that went badly wrong. He discovered crews left debris scattered across his yard, had to have the stucco redone after work around the electric panel, and dealt with water flooding through the roof into his garage. A neighbor who had been planning to sign up changed his mind on the spot after seeing the damaged stucco following the panel replacement and blurted, "Noooooo way." The detail that sticks is not the equipment but the poor cleanup and visible exterior damage that cost them a nearby referral.
Aaron K spent more than two months trying to reach ACS after they installed solar panels on his home. He called at all hours and left voicemail after voicemail; when he finally connected with someone he was promised a salesperson would call back, but that callback never happened. When he needed to re-roof the house he phoned again to ask whether ACS would remove and reinstall the array or if he could pay them to handle it — he got no reply. What stood out was the complete lack of post-installation support: repeated outreach produced silence precisely when he needed coordination for a major home project.
Passed screening
Passed screening
Among the longest-standing installers in the market.
Excellent BBB standing. Strong complaint resolution.
Reviews were posted naturally over time.
Yifei Sun chose ACS to install solar on their home and discovered the project moved unusually fast — from final design through installation and inspection. They finished every step in about two weeks, powered the system soon after, and found it running well. Jerry, the project manager, stood out for his professionalism and quick responses; when scheduling conflicts made a daytime handover impossible, he agreed to come at 7:30 p.m. on a Friday to walk them through the system and instructions. The speed of the process plus that late-evening, in-person walkthrough is the detail that stuck with them.
Garegin began shopping for solar last year skeptical of pushy salesmen and sloppy roof work, so he interviewed four companies before choosing Advanced Conservation Systems. Their consultant, Nash, showed up on time, climbed onto the roof to measure shade, and calmly walked him through three design options. Nash even pulled last year’s utility bills and laid out, in plain language, how California’s new net-billing rules would affect payback—no pressure, no gimmicks. The contract spelled out every dollar for equipment, labor, and permits, with the right-to-cancel language up front. Once he signed, ACS took over the permitting work with the city and utility so he didn’t have to chase any building-department errands. Installation week felt unusually professional. A crew of four NECA-qualified electricians arrived at 7:30 each morning, greeted his kids, and laid drop cloths over the patio furniture before touching a tool. Conduit runs were ruler-straight and roof flashings were tucked under shingles so neatly that his home inspector called the work “textbook.” The team passed inspection on the first try Friday afternoon and even blew the leaves off the driveway before leaving. For
Anderson B. contracted the company in August 2021 to install rooftop electric panels, pool‑heating panels, and a tankless water heater at his home. When the crew finished, he discovered the tankless unit had been installed with its exhaust pipe exposed, venting toxic gas into his car garage. He hired a licensed plumber to correct the installation and paid $606 out of pocket. The installer never provided invoices for the equipment, so he could not claim a $1,000 SoCalGas rebate; by the time he pursued the paperwork the rebate window had closed. The company stopped answering his phone calls and emails while he continued requesting reimbursement and the missing invoices. The bottom line: he ended up with an emergency repair bill, a lost $1,000 rebate, no equipment invoices, and no response from the installer.
Long-term satisfaction for Advanced Conservation Systems drops to 2.3 ★ compared to early reviews. This decline is worse than 75% of installers we looked at.
Long-term reviews carry the most weight in our methodology because they are most representative of what you should be paying for: a system that will perform for years.