Free bill analysis - bring a power bill, get the production math for your actual roof, panel brands like Qcells and REC compared side by side
If the pitch starts at your door and ends with "sign tonight for the special," sleep on it. The sun will still be there tomorrow; so will we.
Before
After
Before
After
Before
AfterFast, Reliable Solar Panel Repair Across Fairfax
Solar panel repair in Fairfax usually comes down to one of three things: a microinverter that quit, wiring that corroded in the fog, or a roof penetration that started leaking after a winter storm. Most repairs run between $275 and $1,600 depending on what failed, and we can typically be at your door the same day if you call before noon. Fairfax is our backyard. We know the hillside lots off Manor Road, the shaded pockets along Bolinas Road, and the older 1940s and 50s rooftops where salt air and redwood canopy both work against your system. Call (877) 550-6892 and a live person picks up. Not a voicemail. Not a ticket. Gus’s crew.
Why Gus’s Solar Is Fairfax’s Preferred Solar Panel Repair Company
Gus Petrakis started this company in 2011 and put his own name on the truck. That matters in a town like Fairfax, where people still ask who did your roof and actually want an answer. We’re not a pop-up crew working out of a call center. When you call about a dead inverter on a Fairfax hillside, the person planning your repair understands the tree ordinance, the fog patterns, and the way salt air settles under your eaves.
Our Fairfax customers call us because we answer honestly. If a microinverter has a corroded MC4 connector, we’ll show you the photo before we replace it. If we can clean a connection and save you $400, we’ll do that instead. The 90-Day Done Right Promise is in writing on every repair: if it’s not right, Gus comes back and makes it right. One call brings him back.
We’ve repaired systems across Fairfax from Oak Manor to Cascade Canyon to the flats near downtown. Response time to most Fairfax addresses is same-day or next-morning. You’ll get a confirmation with a real person’s name, and the tech who shows up will be background-checked, uniformed, and actually employed by Gus’s Solar. No subcontractors. Ever.
Our Solar Panel Repair Services in Fairfax
Inverter Repair & Replacement
String inverters fail. It’s what they do, especially in Fairfax where fog-driven moisture works its way into enclosure seals over time. We diagnose first. A SolarEdge or Tesla inverter showing an arc fault or ground fault may need a new comm board, or it may need full replacement. Our techs carry common replacement parts for Fairfax jobs, so we’re not waiting a week on a warehouse in Texas. If you have an older string inverter under net metering 1.0, we prioritize getting it back online before your true-up statement takes the hit.
Microinverter Replacement
This is the repair we do most often in Fairfax. Your house sits in a fog belt. Salt air settles under your eaves. Microinverter MC4 connectors corrode, usually within 5 to 7 years, and you lose panels one at a time without ever seeing a fault on your bill. We stock Enphase IQ8 and IQ7 replacements and can swap a failed unit in under an hour. Most Fairfax microinverter replacements run $350 to $600 per unit installed. The fix is usually done same day.
Wiring & Connector Repair
Fairfax hillside homes built in the 1940s and 50s often have original conduit runs that were never rated for decades of fog exposure. We find corroded MC4 connectors, brittle wire insulation, and oxidized junction boxes on nearly every older system we open up. We replace with marine-grade stainless fittings where it matters. No tape jobs. No shortcuts. If it’s carrying DC current on your roof, it gets done right.
Panel Replacement After Damage
Storm branches, squirrels, the occasional rock from a hillside mower all take panels out. If a panel is cracked or the junction box is burned, we match it where possible. If the original panel is no longer made, we’ll help you source a compatible module or rework the string so you’re not losing more production than you have to. We’ll also check every panel around the damaged one. One broken branch usually means several stressed mounts.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Fairfax
We work on everything Fairfax homeowners actually have on their roofs: Enphase, SolarEdge, Tesla, FranklinWH, and more. We keep common Enphase and SolarEdge replacement parts in our Bay Area warehouse, which means faster turnaround for Fairfax repairs. If your system was installed by an out-of-state company that’s since gone quiet, we can take it over. We’ll get you monitoring access, map your array, and make the system yours again. No sales pitch. Just a repair plan.
Common Solar Panel Repair Problems We See in Fairfax Homes
- Corroded MC4 connectors on microinverters. Fairfax’s fog pushes salt air under roof eaves, and the connectors are the first thing to go. We’ve seen systems lose 20-30% of production before the owner notices anything on the bill.
- Moisture ingress in Envoy or SolarEdge communication gateways. The antenna seal fails, moisture gets inside, and suddenly you have no production data and a rapid shutdown error. We replace the gateway and weather-seal the new one properly.
- Roof leaks around mounting feet. Older Fairfax homes with steep, weathered shingle roofs leak at the penetration points after a few wet winters. We remove the mount, repair the flashing and shingle, and re-seal with materials rated for coastal exposure.
- Shaded panels dragging down a string. One redwood branch over a single panel on an older string system can cut output across every panel on that circuit. We diagnose whether a microinverter retrofit makes sense, and we never suggest trimming protected trees.
Pricing for Solar Panel Repair in Fairfax, CA
Here’s what Fairfax homeowners can expect to pay for common repairs:
- Microinverter replacement: $350 to $600 per unit, installed
- Inverter diagnostics and board repair: $200 to $450
- Full string inverter replacement: $1,200 to $2,800 depending on size and brand
- Wiring and connector repair: $180 to $500 depending on access and extent
- Panel replacement after damage: $400 to $900 per panel including labor
- Roof leak repair around mounts: $350 to $800 depending on how many penetrations
Every repair starts with a free estimate. The number we quote is the number you pay. We also offer $40 off any repair over $200, a free second opinion on any written estimate from another company, and no trip charge inside Marin County. Seniors and veterans save 10% on every repair, always. Bring us your bill, we’ll bring you the math. Take two weeks to think about it. The price will be the same.
We Also Serve Cities Near Fairfax
If you’re in San Anselmo, San Rafael, Kentfield, or Lucas Valley-Marinwood, we cover those areas too. Our service hub for the region keeps us close, and we often run multiple Fairfax-area jobs in a single day. If you’re outside Fairfax proper but still in Marin, call (877) 550-6892 and ask. If we can’t get to you fast, we’ll tell you straight. For more detail on the full scope of our work, see our Solar Panel Repair service page.
Serving Fairfax, CA - Our Local Coverage Area
We’re based in the Fairfax area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Solar Panel Repair in Fairfax
Because Fairfax sits in an inland valley ringed by forested ridgelines, and those ridgelines extend late-afternoon shadow coverage well beyond what satellite charts predict. The azimuth math assumes open sky to the west. You don’t have open sky to the west. The fix is usually a site-specific shade analysis, which we do in person, not from satellite imagery alone. Call (877) 550-6892 and we’ll come take a look at your actual roofline and canopy cover.
The telltale sign is intermittent rapid shutdown errors that come and go with morning fog. Salt air in Fairfax settles on exterior disconnect boxes and corrodes the contacts. If your Powerwall still charges but your solar array drops out on foggy mornings, that’s the likely culprit. We test the switch, clean or replace it as needed, and seal the new one against the same exposure. Repairs like this usually run $200 to $400. Call us and we’ll diagnose it correctly the first time.
Yes, in most cases. We remove the affected mount, repair the flashing and the shingle around it, and re-seal with materials made for coastal moisture. We don’t replace the whole shingle section unless the decking underneath is rotted. Older Fairfax hillside homes with steep pitches take more wind-driven rain, so we inspect the surrounding mounts too. A straight mount leak repair runs $350 to $800. We’ll tell you what actually needs to happen before we touch anything.
Only if the panel is already on a microinverter or DC optimizer system. A new microinverter won’t change how much sun hits that panel. But if the shaded panel is currently dragging down a string inverter circuit, converting to microinverters or optimizers can absolutely recover lost production on the other panels in that string. Here’s the Fairfax-specific part: we will never suggest trimming your neighbor’s tree. Chapter 8.32 of the town code protects most mature trees, and frankly, your neighbor likely wouldn’t want it anyway. We design around shade. That’s the whole job here. Call (877) 550-6892 and we’ll run the numbers off your actual bill.
You inherit the system and the interconnection agreement, but if the system needs repair, you want it done without triggering a re-review that could bump you off net metering 1.0. We handle this carefully. We take over orphaned systems all the time in Fairfax, including one on a hillside home off Manor Road where we replaced three salt-corroded microinverters and re-commissioned the system to within 4% of its original output. If your old SolarEdge system is underperforming, call us before you call the utility. We’ll tell you what’s repairable and what’s not, free.
When your solar stops working in Fairfax, you lose more than production. You lose net metering credits, true-up statement accuracy, and the quiet confidence that your system is doing what you paid for. We fix that. Solar Panel Repair in Fairfax is what we do, every day. Call (877) 550-6892 for a free estimate. A live person answers. No signature wanted tonight.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Fairfax and Marin County since 2011.