Solar Repair & Maintenance in SW Wisconsin

Solar Repair

Get an Underperforming Array Working Again

A solar array rarely fails loudly. More often the app shows a flat line, an inverter blinks an error code, or output slips below what the same months produced before. Sparks Electrical Solutions offers solar repair, led by our master electrician licensed in Wisconsin and Minnesota, who comes to us with solar industry experience. Our visits are about finding the cause, not swapping parts until something changes.

We work on systems regardless of who put them in. Whoever installed your array, a licensed electrician can read its faults, measure its strings and make the repair. We document what we find so you hold a clear record afterward. That record helps if you later sell the home or the system changes hands.

What's Included

• Low-production troubleshooting using monitoring data
• Inverter fault diagnosis, repair and replacement
• String voltage and current testing
• Connector, wiring and conduit repair
• Ground fault location and correction
• Rapid shutdown testing per NEC 690.12
• Monitoring gateway setup and reconnection
• Storm, hail and rodent damage checks
• Support for orphaned systems

Orphaned Systems Welcome

Installers close, merge or change phone numbers, and the array on your roof keeps needing care. Bring us the system as it stands. We trace the wiring, identify the equipment, test it and report plainly, with no need for the original paperwork to get started.

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📞 Free Estimates

Call (608) 871-1379 or request online. We call back within 1 business day.

✅ Licensed & Insured

Solar and battery work is led by our master electrician licensed in Wisconsin and Minnesota.

Finding Why Output Dropped

Low production has several causes, and the monitoring history usually narrows them. A sudden step down points to a dead string, a tripped breaker or a failed optimizer. A slow slide looks different. NREL field studies found median module performance loss of roughly 0.5 to 0.75 percent per year, so some gradual decline is normal. Shade from a grown tree, snow that will not shed or a dirty array also matter. We separate normal aging from a real fault by measuring each string, not by guessing.

Inverters, Wiring and Connectors

The inverter is the hardest-working part of a system, converting direct current to household power under the UL 1741 listing standard. When one faults, we read the code, check the AC and DC sides and decide whether repair or replacement makes sense. Out on the roof, the usual culprits are sun-baked connectors, chewed insulation, loose lugs and water in conduit. Each repair follows NEC Article 690, with listed parts, and ties back to your panel through the rules in Article 705.

Ground Faults and Rapid Shutdown

A ground fault warning means current is leaking where it should not, often from damaged wire insulation or a pinched cable under a module. We locate the fault, correct it and retest. We also check rapid shutdown under NEC 690.12, the rule that lets firefighters reduce voltage on the roof quickly. If a past repair or equipment swap left the shutdown function incomplete, we bring it back into line.

After Storms, Hail and Critters

Wisconsin weather tests arrays hard. After hail, a high wind or a hard winter, we look for cracked glass, bent racking and displaced wiring. Squirrels and birds like the warm space beneath panels, and they chew cable. We inspect, repair and add wire management or screening where it helps. For insurance questions, we can describe the electrical findings in writing.

Monitoring and Routine Checkups

Many arrays lose monitoring after a router change, which hides real problems for months. We reconnect the gateway, confirm each string reports and show you what normal looks like. A periodic electrical checkup of connections, disconnects, labels and torque is the surest way to catch a small problem early, and we can set one up on request. We offer free estimates for repair calls.

Related services: Solar & Battery Services · Solar Panel Removal Reinstall · Battery Backup Storage · Electrical Repairs · Get a Quote

Frequently Asked Questions