Solar Panel & Inverter Repairs

Is Your Solar Panel System No Longer Performing?

A solar system should quietly reduce your electricity bills every day. When production suddenly drops, your inverter displays an error code, or your electricity bill begins climbing unexpectedly, it usually indicates an underlying fault that requires professional attention.

At Pica Electrical, we specialise in diagnosing and repairing residential and commercial solar power systems across Sydney. Unlike companies focused solely on installing new systems, our team is experienced in identifying the root cause of solar faults and restoring systems safely and efficiently.

Whether your inverter has stopped producing power, your solar panels have been damaged during a storm, or your monitoring app is reporting reduced generation, our qualified technicians provide accurate fault diagnosis and practical repair solutions designed to maximise the life of your solar investment.

Why Solar Systems Stop Working

Modern solar systems are extremely reliable, but they operate outdoors in harsh Australian conditions every day of the year. Heat, UV exposure, moisture, storms and normal component ageing can all contribute to reduced performance over time.

Many faults develop gradually, often going unnoticed until electricity bills increase or the inverter shuts down completely.

Some of the most common issues we encounter include:

• Failed solar inverters

• Damaged solar panels

• Water ingress into rooftop isolators

• Earth faults

• Isolation faults

• Failed DC connectors

• Damaged optimisers

• Loose or deteriorated cabling

• Monitoring communication failures

• Grid voltage issues

• Incorrect circuit breaker sizing

• Bird and rodent damage

• Corrosion

• Storm damage

• Hail damage

  
  

Early diagnosis usually prevents minor faults from becoming expensive repairs.

Common Signs Your Solar Panel System Needs Repair

Many homeowners assume their solar system is working simply because the inverter display is illuminated. Unfortunately, this isn't always the case.

Watch for these warning signs:

Your Electricity Bills Have Increased

If your energy usage hasn't changed but your bills continue to rise, your solar system may not be generating the power it once did.

Your Solar Inverter Displays an Error

Most modern inverters provide fault notifications.

Common examples include:

• Isolation Fault

• Grid Fault

• Earth Fault

• Over Voltage

• Under Voltage

• Arc Fault

• Fan Failure

• Communication Fault

  
  

Never ignore these messages.

Reduced Daily Solar Generation

Monitoring software makes it easy to compare today's production with previous weeks.

A steady decline often indicates an underlying fault requiring investigation.

Physical Damage

Visible signs include:

• Broken glass

• Cracked panels

• Burn marks

• Loose cables

• Corrosion

• Water inside isolators

• Bird nests beneath panels

Our Solar Repair Process

Rather than simply replacing parts, we follow a structured diagnostic process designed to identify the actual cause of the problem.

Step 1 – System History Review

We begin by reviewing:

• Historical production

• Inverter logs

• Error history

• Monitoring data

• Customer observations

This helps narrow the potential causes before physical testing begins.

Step 2 – Visual Inspection

Our technician inspects:

• Solar panels

• Mounting rails

• Roof penetrations

• Cabling

• DC isolators

• AC isolators

• Earthing

• Switchboard

• Inverter installation

• Battery installation (if applicable)

Step 3 – Electrical Testing

Professional testing may include:

• DC Voltage Testing

• DC Current Testing

• AC Voltage Testing

• AC Current Testing

• Insulation Resistance (Megger) Testing

• Earth Continuity Testing

• Polarity Testing

• String Testing

• Open Circuit Voltage

• Short Circuit Current

These tests allow us to accurately diagnose faults rather than relying on assumptions.

Step 4 – Repair Recommendations

Once testing is complete, we explain:

• The cause of the fault

• Available repair options

• Whether replacement is recommended

• Estimated costs

• Expected system performance after repair or replacement

  
  

Solar Panel And Inverter Repairs

The inverter is the heart of every solar power system. While solar panels can last 25 years or more, most inverters have a shorter operational lifespan.

Repairs depends on the age of the inverter and parts availability from manufactures. We will not use aftermarket parts for repairs as we are unable to guarantee the repair. Often if an inverter is found faulty the best option is a replacement. There are some exceptions.

We inspect and replace many leading brands, including:

• Fronius

• Sungrow

• SolarEdge

• Solis

• GoodWe

• SMA

• ABB

• Huawei

• Enphase

Common inverter issues include:

• Internal component failure

• Fan failure

• Water damage

• Communication faults

• Grid faults

• Firmware issues

• DC input faults

Solar Panel Repairs

Damaged solar panels don't always require replacing the entire system.

Depending on the fault, repairs may include:

• Panel replacement

• Connector replacement

• Cable repairs

• Junction box repairs

• Optimiser replacement

• Re-terminating damaged wiring

  
  

Every repair begins with confirming the exact cause of reduced performance.

Solar Fault Finding

Accurate fault finding is the difference between replacing unnecessary components and solving the actual problem.

At Pica Electrical, we investigate:

Earth Faults

Damaged insulation or moisture can allow current to leak to earth.

Isolation Faults

Often caused by deteriorated DC wiring, connectors or rooftop components.

Grid Voltage Problems

High grid voltage may force the inverter to disconnect during peak generation.

Communication Failures

Monitoring systems may stop reporting despite the solar system still operating.

Optimiser Failures

Individual optimiser failures can significantly reduce overall system performance.

Repair or Replace?

Not every solar fault requires replacing expensive equipment.

Repairs are often the best solution when:

• The inverter is relatively new.

• Spare parts are available.

• Damage is localised.

• Panels remain in good condition.

Replacement may be more economical when:

• Equipment is beyond its expected service life.

• Repairs approach the cost of replacement.

• The manufacturer no longer supports the product.

• The system requires a major upgrade.

Our goal is to recommend the most practical and cost-effective option for your circumstances.

Why Choose Pica Electrical?

Choosing the right contractor is just as important as choosing the right repair.

Pica Electrical offers:

• SAA-accredited solar installers and repair specialists

• Gold Master Electrician

• Fully licensed and insured electricians

• Experienced solar fault-finding technicians

• Residential and commercial expertise

• Diagnostic equipment

• Comprehensive electrical testing

• Honest repair recommendations

• 10-year workmanship warranty on eligible installation work

• High-quality replacement components

• Strong focus on safety and compliance

We take the time to identify the true cause of the problem rather than replacing parts unnecessarily.

Frequently Asked Questions

How much does a solar repair cost?

The cost depends on the nature of the fault. Minor repairs may involve replacing connectors or repairing wiring, while major faults such as inverter replacement require a larger investment. A professional inspection is the best way to determine the required work.

Can one faulty solar panel affect the whole system?

Yes. In many string inverter systems, the performance of one damaged panel can reduce the output of the entire string.

How long do solar inverters last?

Most modern residential inverters have an expected service life of around 7–15 years, although this varies depending on the brand, installation environment and maintenance.

Is it worth repairing an older solar system?

In many cases, yes. If the panels remain in good condition and only one component has failed, repairing the system can be far more cost-effective than replacing it.

Should I clean my solar panels?

Occasional professional cleaning may improve performance where dirt, bird droppings or debris have accumulated, but cleaning alone will not fix electrical faults.

Do you repair all brands?

Yes. We regularly inspect and repair systems from many leading manufacturers, including Fronius, Sungrow, SolarEdge, Solis, GoodWe, SMA, ABB, Huawei and Enphase.

Related Articles

Continue learning about solar system care with these guides:

• Solar Inverter Repairs Sydney

• Solar Panel Repairs Sydney

• Solar Fault Finding Explained

• Common Solar Inverter Error Codes

• How Often Should You Service Your Solar System?

• Solar Repair vs Replacement

• Solar Maintenance Checklist

• Why Your Solar System Isn't Producing Power

Book a Professional Solar Repair

If your solar system has stopped producing power, your inverter is displaying an error code, or your electricity bills have increased unexpectedly, early diagnosis can prevent more costly repairs.

Pica Electrical provides professional solar panel and inverter repairs throughout Sydney, including the Northern Beaches, North Shore, Mosman, Chatswood, Frenchs Forest, Lane Cove and surrounding northern suburbs of sydney.

Our experienced team uses advanced diagnostic testing, including thermal imaging, insulation resistance testing and complete electrical system inspections, to identify faults accurately and recommend the most effective repair.

Contact Pica Electrical today to arrange a professional solar inspection and restore your system's performance with confidence.