You invested in solar to save money on electricity — but how do you know if your system is actually performing as well as it should? Many homeowners don't realise their solar system is underperforming until they notice their bills creeping back up. Here are five warning signs to watch for and what to do about them.
What Good Production Looks Like
In Port Stephens and the Hunter Valley, with average solar irradiation of 4.67 kWh/m²/day, a well-performing system should produce approximately 4-4.5 kWh per day for every 1kW of installed capacity. That means:
- 5kW system: 20-22.5 kWh/day average
- 6.6kW system: 26-30 kWh/day average
- 10kW system: 40-45 kWh/day average
These are annual averages — summer production will be higher, winter lower.
Warning Sign 1: Inverter Fault Codes or Red Lights
Your inverter is the brain of your solar system. If it's showing red or orange lights, or displaying fault codes, something is wrong. Common inverter issues include earth faults, grid voltage issues, and overheating. Check your inverter display daily — a solid green light means everything is working correctly.
Warning Sign 2: Unexpected Shading
Trees grow. Neighbours build extensions. New developments go up. Shading that wasn't there when your system was installed can dramatically reduce production. Even partial shading on one panel can affect string performance if you don't have micro-inverters or optimisers. Walk around your property at different times of day to check for new shade sources.
Warning Sign 3: Dirty or Damaged Panels
While rain generally keeps panels clean enough, Port Stephens coastal homes can accumulate salt spray, bird droppings, and pollen that reduce output by 5-20%. Cracked glass, discolouration (browning or yellowing), or visible hotspots indicate physical damage that needs professional attention.
Warning Sign 4: Degraded Panel Performance
All solar panels degrade over time — typically 0.5-0.7% per year. However, some lower-quality panels degrade much faster. If your system is only 3-5 years old but producing 20%+ less than expected, you may have a panel degradation issue covered under warranty.
Warning Sign 5: Communication or Connection Issues
If your monitoring app shows gaps in data, zero production during sunny periods, or can't connect to your system, there may be a communication fault between your inverter and monitoring platform. While this doesn't always mean reduced production, it does mean you can't track performance.
What to Do Next
If you've noticed any of these signs, it's time for a professional solar health check. Me-Solar offers comprehensive system inspections for Port Stephens and Hunter Valley homes. We'll test every component, identify any faults, clean your panels if needed, and provide a detailed report with recommendations. Call us on 0408 651 929 to book an inspection.