Does your power bill suddenly seem higher than usual? Do the inverter lights look different? Or maybe you’ve just realised your system hasn’t produced much power lately. It’s very common to wonder if solar panels not working properly might be the reason.
Indeed, because solar systems run quietly in the background, most homeowners only notice issues when those savings drop or the warning lights appear. The good news? There are a few quick ways to confirm what’s really going on before you need to call a solar technician.
Why people suspect a solar problem
Are you asking yourself “why is my solar not working?” You’re definitely not alone. Among the common warning signs are:
- Your electricity bill is higher despite sunny weather.
- The inverter screen shows red lights, fault codes, or “standby”.
- The monitoring app hasn’t updated for days or shows zero output.
- Your meter readings don’t match your usual generation patterns.
- Visible dirt, shade, or bird nesting on panels.
Of course, these signs don’t always mean a failure – sometimes it’s just a temporary solar problem caused by debris, shade, or a tripped switch.
Step-by-step: How to check if your solar panels are working
But if you’re not sure, we’ve put together this simple process to confirm whether your system is performing as it should.
1. Check your solar inverter
The inverter is the heart of your system – it converts DC energy from your panels into usable AC power.
- Look for any flashing red or orange indicator lights.
- If it displays an error code, note it down.
- If the screen is blank, check that the main DC isolator is on.
A blank or fault-coded inverter often points to a solar system not working rather than a utility supply issue.
2. Check the solar generation display or app
Most modern systems have a helpful monitoring platform that shows daily or hourly generation.
- Log in to your app or portal.
- Compare today’s reading with similar sunny days from previous weeks.
If generation has suddenly dropped to zero, your suspicion of a solar panel not working quite right might well be correct.
Occasionally, data glitches can cause missing information, so it’s smart to double-check the inverter’s own display too.
3. Inspect the isolation switches
All solar systems have AC and DC isolators for safety.
- Make sure both switches are in the “ON” position.
- Reset any breakers that might have tripped in your switchboard.
- Never open electrical covers – just inspect visible switch handles.
If the system restarts after switching back on, the fault was likely minor. If not, it’s time for a professional inspection to rule out faulty solar panels or wiring issues.
4. Look for obvious panel damage or dirt
From the safety of ground level, take a careful look at your roof array. Do you see cracked glass, bird nests, heavy dust, or shading from new trees?
Panels covered in grime can lose efficiency or stop producing power entirely. Just don’t climb the roof itself – to be safe, use binoculars or a camera zoom instead.
Physical damage can cause common solar panel problems such as hot spots or reduced voltage.
5. Test energy flow during the day
With the inverter on, some appliances running, and the sun shining:
- Watch your power meter or app to see if energy is being exported.
- If export is zero while the inverter claims to generate power, contact your retailer or solar repair electrician.
Learning how to check solar panels is working properly is easy with this quick comparison method through both the inverter and the grid.
When you can fix it – And when you can’t
Some issues are minor, others need licensed expertise. Here’s a quick guide.
You Can Try:
- Cleaning panels from the ground using a long-handled soft brush and water.
- Resetting the inverter if your manual recommends it.
- Checking for shade from new trees or structures.
You Need A Pro When:
- The inverter shows a persistent error or no power light.
- You notice melted cabling, water inside isolators, or cracked glass.
- The problem keeps returning after resets.
Remember, electrical faults in rooftop systems must only be handled by qualified electricians – especially those certified for solar work and Level 2 electrical connections.
Understanding the real causes
Solar not working and you’re pretty sure you’ve identified a problem? There are several technical reasons why this situation might have appeared suddenly:
Faulty wiring or connectors: Loose joins can interrupt current flow.
Water ingress: Moisture inside junction boxes can short-circuit components.
Degraded inverter: Older models often fail after 8-10 years.
Grid changes: Voltage spikes or network issues can trigger shutdowns.
Shading and dirt: These gradually reduce output until you notice the bill rising.
When your solar panel problems persist, it’s worth arranging a full system health check. Professionals use electrical testing tools and infrared cameras to detect weak strings or hot cells before they fail completely.
The role of professional diagnostics
“How do I know if my solar panels are working correctly?” is a question we hear all the time here at Wire In Electrical. From our side of the fence, we use advanced testing and monitoring equipment to pinpoint exactly what’s up. A qualified technician can:
- Run through live generation data
- Check each string’s voltage
- And safely test for insulation resistance.
If we find a solar panel broken, we’ll determine whether warranty coverage applies and replace it with a matching panel to maintain system balance.
In some cases, the inverter might be the real issue – not the panels themselves. Experienced electricians can distinguish between a solar panel not working well and inverter communication errors, saving time and unnecessary replacements.
How professionals fix solar issues
When solar panel problems are confirmed, here’s how licensed experts restore full operation:
Inspection & Testing: Comprehensive visual checks plus voltage, current, and resistance testing.
Component Replacement: Any faulty solar panels, connectors, or isolators are swapped out.
Firmware Updates: Inverters often need updated software to stay compatible with grid requirements.
Performance Verification: Once repaired, live generation is monitored for stable output.
Preventative Maintenance: Cleaning, retightening, and shading assessment to avoid future issues.
This process ensures reliability and extends the lifespan of your entire system – not just a single component.
Why professional help matters
Don’t ever forget that electricity and rooftop access both involve risk. A certified solar electrician understands both the electrical standards and safety requirements that apply in NSW. Attempting to repair your own system could void warranties or create new hazards.
When you’re unsure how to check solar panels are working correctly, it’s always safer (and often cheaper) to call a pro who can isolate the fault quickly.
If you’re asking: “Why are my solar panels not producing enough power?”, that tends to be a persistent generation issue that points to subtle problems only visible with professional testing tools.
Stay powered with Wire In Electrical
Suspect you have a solar panel not working? From these sorts of checks to full system repairs and upgrades, Wire In Electrical’s friendly Sydney-based team provides fast, affordable, and safe service. We handle everything from inverter resets to faulty panels and beyond – ensuring your wise investment keeps delivering strong returns.
Call or book online for expert solar diagnostics and repairs you can trust in the Hills District, Penrith, Parramatta, Blacktown and Hawkesbury regions.
