93
Trust
Score
WattBot

Prometheus Solar reviews

Prometheus Solar
39 Reviews • 1 Location 5,187 Data Points Processed

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The Verdict

Prometheus Solar will fix another company's shoddy work and won't stop until it's right. We found one homeowner stranded on a fully off-grid system after their original installer left wiring so tangled the owner called it a "rat's nest." Prometheus drove 90 minutes each way, rewired the battery bank to match manufacturer specs the first contractor ignored, then returned the same evening when a generator issue surfaced. In 16 reviews praising workmanship, we noticed a pattern: the crew doesn't just solve the immediate problem. They remote-monitor systems from Flagstaff, call customers before inverters fail, and replace warranty parts proactively. One reviewer expanded their system years later without getting competing bids because they trusted no one else would match the quality. The downside: communication can be inconsistent. Two reviews mention needing to chase updates during projects, and one crew forgot materials on-site. But when the work matters, they show up. One installer even wiped dust off battery tops after rewiring them, a detail so small it signals how seriously they take the job.

If you need someone to rescue a failing system or want an installer who'll monitor your panels remotely for years after the job ends, Prometheus is worth the premium. Just expect to ask for progress updates yourself.

3 Stories That Stood Out

1. Dave W.
Yelp | Nov 22, 2023 |

Dave had a new home built in 2021 and lives completely off-grid, depending solely on his solar setup out in the Chino Valley area — more than an hour and a half from Flagstaff. After enduring two and a half years of mystery and mounting problems with the original installer, and feeling they’d been kept in the dark about how their system worked, his builder reached out to Prometheus. The owner, Ryan Holtz, drove out to survey the array, diagnosed a persistent surging issue the prior contractor wouldn’t or couldn’t fix, and immediately went to work protecting the system. He installed surge protectors on both sides of the inverter, patiently walked through how things worked, and asked for remote access so Prometheus could monitor the system from Flagstaff. As he inspected the site, he visibly shook his head at shortcuts and laid out a clear plan to correct them. Ryan sent Louis and Christian back a few weeks later. They installed lightning arrestors across the solar field to shield the charge controller circuits, replaced the tiny field junction with a properly sized enclosure, swapped undersized wire nuts for larger ones and tidied two “rats nests” of cabling into a neat, code-minded

2. Tom Broderick
Google | Oct 16, 2019 |

Tom picked this company for a full home solar install after getting multiple bids, and he walked away impressed by their technical know-how and how smoothly they handled the utility side of things. What stuck with him the most came years later when they proactively discovered a failed inverter on a single panel before he ever noticed it and called to schedule a warranty replacement. Installation itself felt easy and professional, and the team kept answering solar questions long after the job was done. When he later decided to expand the array, he didn’t even request new quotes — he trusted them to do it right, and they delivered again. The detail he keeps telling people about is that they flagged and fixed that bad inverter for him without a fuss.

3. William Lemon
Google | Aug 21, 2019 |

William found the crew pleasant and easy to deal with, but the project was hampered by repeated forgetfulness about needed materials. He experienced poor communication throughout the work and kept having to call the company to get status updates. Crews sometimes left the property without confirming whether tasks were complete, so he had to chase answers multiple times. Friendly staff contrasted with the ongoing logistical headaches — the lingering impression was not the workmanship but the time spent chasing parts and clarity.

Platforms Monitored

Google
35 Reviews · 1 Location
4.8/5
Yelp
4 Reviews · 1 Location
5.0/5
SolarReviews
Tracking
N/A
EnergySage
Tracking
N/A
BBB
Tracking
N/A

Performance by Work Type

SOLAR
SOLAR
Installation, permitting, and grid connection.
4.9/5
BATTERY
BATTERY
Energy storage for backup savings and independence.
5.0/5
SERVICE
SERVICE
Repairs, maintenance, and ongoing system support.
5.0/5
ROOFING
ROOFING
Repair or replacement, before or after solar installation.
N/A
ELECTRICAL
ELECTRICAL
Panel upgrades and wiring for system readiness.
N/A
COMPLEX PROJECTS
COMPLEX PROJECTS
Multi-trade installations requiring co-ordination.
N/A

How We Got To Trust Score 93

Clean Record

Unauthorized Activities

Passed screening

We checked for:
Unauthorized charges
Undisclosed loans
Identity theft
Forged signatures
Fake contracts
Falsified permits

Misleading Claims

Passed screening

We checked for:
Bait & switch
Overstated savings
Hidden fees
Misrepresented specs
False performance
Misleading warranty

Background Check

Serving customers for 10 years

Operating longer than most installers in the market.

BBB Rating: A+

Excellent BBB standing. Strong complaint resolution.

Natural Review Patterns

Reviews were posted naturally over time.

What You Can Expect

01

1. Tom Broderick
Google | Oct 16, 2019 |

Tom picked this company for a full home solar install after getting multiple bids, and he walked away impressed by their technical know-how and how smoothly they handled the utility side of things. What stuck with him the most came years later when they proactively discovered a failed inverter on a single panel before he ever noticed it and called to schedule a warranty replacement. Installation itself felt easy and professional, and the team kept answering solar questions long after the job was done. When he later decided to expand the array, he didn’t even request new quotes — he trusted them to do it right, and they delivered again. The detail he keeps telling people about is that they flagged and fixed that bad inverter for him without a fuss.

2. George G.
Yelp | Apr 29, 2019 |

George G. hired Prometheus to install a solar pump and system for an 820-foot-deep well on a remote property about three hours from Flagstaff. About three years ago they put in panels, controls and the pump; the installation held up, looks tidy, and delivered reliable performance — the crew arrived on time, stayed organized, and walked him through how everything worked. On March 24 they returned to upgrade the system: swapping out old lead‑acid batteries for AGM batteries, adding two panels, installing a new charge controller and a cutoff switch. The team completed the overhaul cleanly and left the remote system running noticeably better and neater than before. The standout detail is their willingness and ability to do quality, dependable work far from town; he plans to call them again for future upgrades because the system now performs flawlessly.

3. Lisa Freer
Google | Sep 30, 2025 |

When Lisa Freer needed work on the solar panels on her roof, she specifically asked for technician Luis Orona to handle the job. He inspected the array thoroughly, tightened and secured everything, and paid close attention to small details that could have been missed. He even came out after hours to help, which left her feeling taken care of and confident in the system. She plans to be back next season to explore an upgrade, and what she remembers most is Luis’s willingness to assist outside normal hours and his meticulousness in making the panels secure.

02

1. Tam Mudd
Google | Feb 9, 2018 |

Tam hired Prometheus Solar to install panels on their home many years ago, and the original installation held up well. A few times individual panels stopped working, and each time Prometheus returned, honored the warranty, and repaired or replaced the faulty parts. That willingness to come back and fix problems years after the install became the defining part of the experience. They now steer friends and neighbors toward Prometheus whenever solar comes up. What stuck with them most was that the company handled those repairs under the guarantee with no surprise bills or pushback.

2. Joe Baka
Google | Jul 18, 2025 |

Joe Baka brought José and his team onto a GlobeLife project and walked away impressed. He discovered they paired genuinely professional, skilled work with a standout customer experience. José’s crew handled the job competently while keeping the client’s experience front and center, and that combination—technical quality plus attentive service—is what made the engagement memorable.

3. Dave Wolken
Google | Nov 22, 2023 |

Dave had a new home built in 2021 and opted to run completely off-grid, so every watt of power comes from the solar array on his Chino Valley property — more than an hour and a half from Flagstaff. After two and a half years of struggling with the original installer — who left him with little instruction and a surging system the contractor wouldn’t fix — his builder contacted Prometheus. Ryan Holtz, the owner, drove out to survey the setup and immediately traced the surging issue to shortcuts left by the prior crew. He installed surge protectors on both sides of the inverter, walked Dave through how the system worked, and gained remote access so Prometheus could monitor performance from Flagstaff. Ryan’s quiet frustration at the shoddy workmanship made it clear why the problems persisted. With Dave’s okay, Prometheus sent technicians Louis and Christian back to the house. They fitted lightning arrestors across the solar field to protect the charge-controller circuits, replaced the tiny junction box with a correctly sized enclosure, and swapped undersized wire nuts for properly sized connectors. Inside, they added an electrical distribution box so the three battery cables were the同e

03

1. Jolyn Nebeker
Google | Jul 24, 2024 |

Jolyn ran into trouble with her home's solar battery, and the company arranged for a repair technician to come to her property to address the issue. She awarded five stars, with the standout detail being that they scheduled an on-site repair visit to handle the battery problem.

2. Dave W.
Yelp | Nov 22, 2023 |

Dave had a new home built in 2021 and lives completely off-grid, depending solely on his solar setup out in the Chino Valley area — more than an hour and a half from Flagstaff. After enduring two and a half years of mystery and mounting problems with the original installer, and feeling they’d been kept in the dark about how their system worked, his builder reached out to Prometheus. The owner, Ryan Holtz, drove out to survey the array, diagnosed a persistent surging issue the prior contractor wouldn’t or couldn’t fix, and immediately went to work protecting the system. He installed surge protectors on both sides of the inverter, patiently walked through how things worked, and asked for remote access so Prometheus could monitor the system from Flagstaff. As he inspected the site, he visibly shook his head at shortcuts and laid out a clear plan to correct them. Ryan sent Louis and Christian back a few weeks later. They installed lightning arrestors across the solar field to shield the charge controller circuits, replaced the tiny field junction with a properly sized enclosure, swapped undersized wire nuts for larger ones and tidied two “rats nests” of cabling into a neat, code-minded

3. Drew Evans
Google | Oct 12, 2022 |

Drew was setting up a new home for off‑grid living and vetted a long list of solar providers before picking Prometheus for their willingness to design a custom system and their meticulous attention to detail. He ended up with a tailored off‑grid solar setup and appreciated how hands‑on the team was through the design and installation process. He singled out Kelly, Daniel and Ryan for their dependable, thoughtful work and looks forward to many years of ongoing support. The memorable detail: Prometheus delivered a bespoke solution rather than a cookie‑cutter package, which made all the difference for off‑grid needs.

Long-term Satisfaction

Long-term satisfaction for Prometheus Solar holds steady at 5.0 ★. This is better than 83% 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.

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