Is Your Solar System Ready for Melbourne Summer? 10 Things to Check Before December 2026

1. Check Your Solar Generation

Start with your solar monitoring app or inverter display. Most modern solar systems provide information about daily electricity generation. Some systems also show household consumption, grid imports, solar exports and battery activity. Look at the generation over several clear days rather than relying on a single day's result. Ask yourself: Is the system generating electricity during daylight hours? Does generation look broadly consistent with previous comparable days? Are there any sudden drops in output? Does the monitoring app show warnings or error messages? Has the system stopped reporting data?

Remember that solar generation changes with the weather, season, roof orientation, shading and system size. A cloudy day will not produce the same result as a clear summer day. The useful warning sign is an unexplained drop in generation compared with similar conditions.

Samsun tip: If your monitoring app shows unusually low generation on several clear days, arrange a professional inspection rather than assuming that the panels simply need cleaning.

2. Look for Visible Dirt, Leaves and Bird Droppings

Melbourne homes can experience dust, pollen, leaves and bird droppings throughout the year. A build-up of material on solar panels can block sunlight and affect generation. From a safe position on the ground, look for heavy dust or dirt build-up, leaves collecting around the panels, bird droppings covering sections of the array, visible debris that appears to remain after rain, and signs of damage or discolouration.

Do not climb onto your roof to inspect or clean the panels. Avoid pressure washers, harsh chemicals and abrasive cleaning equipment. Incorrect cleaning can damage panels and create a serious fall or electrical risk. If your panels are difficult to access or need a proper clean, arrange professional assistance.

Also remember that cleaning is only one part of solar maintenance. A clean panel does not automatically mean the electrical system is safe or working correctly.

3. Check Your Inverter for Warning Lights or Error Messages

Your inverter is one of the most important components of your solar system. It converts the electricity produced by your solar panels into usable electricity for your home and the grid. If the inverter develops a fault, your solar generation may be reduced or stop altogether. From a safe position, check the inverter display or monitoring application for red warning lights, fault codes or error messages, unexpected shutdown notifications, missing generation information, and repeated connection or communication alerts.

Different inverter brands use different warning indicators and fault codes. Do not open the inverter or attempt electrical repairs yourself. If you see a warning that you do not understand, record the message or take a photograph of the display from a safe distance. Contact your original installer or a suitably qualified solar professional.

4. Make Sure the Inverter Has Adequate Ventilation

Hot weather can make inverter ventilation particularly important. Inverters produce heat while operating. They need suitable installation conditions and unobstructed ventilation to manage that heat. Check from a safe position that the area around the inverter is clear, nothing is covering its ventilation openings, stored boxes or household items are not blocking airflow, leaves, dust and debris are not collecting around the equipment, and the inverter does not show repeated overheating warnings.

Do not remove covers, dismantle equipment or attempt to clean internal electrical components. If your inverter is exposed to direct afternoon sunlight or regularly reports temperature-related faults, ask a qualified installer to assess its location and operating conditions.

5. Look for New Shading Around Your Solar Panels

Shading is one of the factors that can affect solar performance. A tree that was small when your panels were installed may now be large enough to cast shadows across part of your roof. Other possible sources of shading include new neighbouring buildings, extensions or roof structures, growing trees and branches, antennas and other rooftop equipment, and new structures around the property.

The sun's position also changes throughout the year, so shading can affect panels at different times of the day and across different seasons. If you suspect that new shading is affecting your system, ask your installer to assess the roof and generation pattern. Use a qualified arborist or appropriate professional if tree work is required.

6. Review Your Electricity Bill Alongside Your Solar Generation

Your solar system may be working correctly while your electricity bill remains higher than expected. This can happen because generation and household consumption do not always occur at the same time. For example, your solar panels may generate most of their electricity during the middle of the day, while your family uses more electricity in the evening.

Look at your latest electricity bill and compare it with your solar monitoring data. Check total electricity imported from the grid, electricity exported from your solar system, your feed-in tariff, your electricity usage during peak periods, daily supply charges, and changes in household consumption. If your household uses more electricity during summer, your air conditioner and other appliances may increase grid consumption, particularly after sunset.

7. Review Your Air Conditioning and Summer Electricity Usage

Air conditioning can become a major household electricity load during hot weather. If your home already has solar, try to understand how your cooling requirements match your solar generation. For example, running an air conditioner during the day may allow your household to use some of the electricity generated by your solar panels. However, the actual result depends on your solar capacity, air conditioner efficiency, home insulation, temperature settings and household usage.

Before summer: Check whether your air conditioner is operating normally. Clean or replace filters according to the manufacturer's instructions. Check that outdoor units have suitable clearance. Consider whether your current system is appropriate for the rooms being cooled. Review how your household uses electricity during the day.

8. Check Your Solar Battery, If You Have One

If your home has battery storage, summer is a good time to review how the battery is operating. Your monitoring app may show battery state of charge, charging from solar, discharging to the home, grid charging if enabled, battery alerts or faults, and changes in charging and discharging patterns. Ask yourself: Is the battery charging during periods of available solar surplus? Is it supplying electricity when your household needs it? Does the monitoring app show any unusual warnings? Are your backup settings configured as intended? Is there anything stored too close to the battery?

Do not assume that a battery should always charge to 100% or discharge completely every day. The manufacturer's operating limits and system configuration matter. If you notice unusual behaviour, contact your battery installer or a qualified professional. Never open the battery enclosure or attempt to repair it yourself.

9. Check Your Solar System's Age, Warranty and Service History

When was your solar system installed? If it has been several years since installation, it may be time to review the system's condition and service history. Solar panels, inverters, isolators, wiring, mounting equipment and batteries all have different operating requirements and expected lifespans.

Keep the following information together: original installation date, solar panel brand and model, inverter brand and model, battery details if installed, product warranties, installation and workmanship warranty, previous service reports, and any repair or replacement history. If you have recently purchased a home with an existing solar system, try to obtain its installation documents and monitoring access.

How often should a solar system be serviced in Victoria?

Victorian government guidance recommends professional solar system servicing at least once every two years. Your installer may specify a different maintenance schedule depending on the system and equipment.

Do solar panels need cleaning before summer?

Not every system needs cleaning before summer. Rain can remove some surface dirt, but heavy dust, bird droppings and stubborn debris may affect performance. If cleaning is needed, use a suitable professional service and follow the panel manufacturer's instructions.

Can hot weather affect solar panel performance?

Yes. Solar panels can produce less efficiently as their operating temperature rises, even when sunlight is strong. Inverter ventilation and the overall system condition are also important during hot weather.

Why is my solar system generating less electricity than before?

Possible causes include shading, dirt, weather differences, monitoring issues, inverter faults or damaged components. Compare generation across similar conditions and arrange a professional inspection if the reduction is unexplained.

Should I switch off my solar system before summer?

No. There is no general requirement to switch off a correctly operating solar system simply because summer is approaching. Follow the manufacturer's instructions and contact a qualified professional if you have a fault or safety concern.

Is solar panel cleaning the same as solar servicing?

No. Cleaning removes dirt and debris from panels. Professional servicing also involves inspecting and testing electrical components, cables, switches, inverter operation and other parts of the system.

Can I inspect my solar panels myself?

You can look at your panels from the ground and check your monitoring app. Do not climb onto the roof, open electrical equipment or attempt repairs. Arrange professional help if you notice damage or a fault.