If your electricity bills have crept back up, your monitoring shows lower output than expected, or your system is 3+ years old without a professional check—it may be underperforming. Easy Solar recovered 17.3% of annual energy loss for a 1 MWp farm in Tuaran through yield optimization. Early detection saves you thousands of ringgit and extends panel lifespan.
Sign 1: Your Electricity Bills Are Rising Again
Solar is supposed to reduce your electricity bills permanently. If your SESB bill has crept back up after the first year or two, something is wrong.
Why this happens:
- Panels are losing output efficiency (sooner than expected normal degradation of 0.5% per year)
- Inverter is not converting DC to AC power efficiently
- Wiring connections are corroded or loose
- String diodes are failing, blocking power from certain panel groups
What to do: Check your monitoring dashboard. Compare this month's generation to the same month last year. If generation has dropped 5%+ beyond normal degradation, request a professional yield audit.
Sign 2: Daily Generation Is Dropping Faster Than Normal
Panel degradation in Sabah's tropical climate is normal: expect 0.5% annual loss. Over 10 years, that is 5% total loss. But if your system is dropping 10%+ in a single year or 2%+ per year, something is failing.
Normal degradation timeline:
- Year 1: 2–3% (initial settling)
- Years 2–25: 0.5% per year (steady decline)
- Year 10: Should still be at ~96% of year 1 output
- Year 25: Should still be at ~90% of year 1 output
If your 5-year-old system is at 80% output, you are losing 4% per year—double the normal rate.
What to do: Collect 6 months of monitoring data and compare it year-on-year. Request a thermal drone inspection and module string analysis to identify which panels or sections are failing.
Sign 3: Inverter Errors or Frequent Shutdowns
Modern inverters are smart—they monitor temperature, voltage, and frequency. If yours is throwing error codes or shutting down during peak sun, it is protecting itself from damage.
Common inverter warnings in Sabah:
- Temperature warning: Inverter is overheating (poor ventilation, dirty air filter, tropical heat)
- Grid frequency error: Local grid voltage is unstable (SESB infrastructure issue or your site wiring)
- Isolation fault: A ground connection is failing (corrosion, water damage, rodent damage)
- Communication loss: Monitoring module is disconnected from the inverter
What to do: Note the error code and time it occurred. Check if it happens during peak generation or high temperature hours. Contact Easy Solar to diagnose—most errors are fixable within a day.
Sign 4: Visible Damage or Debris on Panels
Sabah's weather is harsh: heavy rain, salt spray (if near coast), bird droppings, and lichen growth block sunlight and degrade panels faster.
Visual red flags:
- Cracked glass or delamination: Water is seeping in; module will fail within months
- Bird nests or dead animals: Blocks 30–60% of sunlight on that string
- Heavy dust, sand, or salt buildup: Reduces output by 10–25%; tropical rain should clean it, but Sabah is tropical AND dry in some seasons
- Green lichen or moss: Thrives in Sabah humidity; reduce output by 5–15% per affected panel
- Loose or corroded cables: Fire hazard and power loss
What to do: For debris, contact a professional cleaner (DIY climbing is dangerous). For cracked panels, they must be replaced. For loose cables, turn off the system and call Easy Solar immediately.
Sign 5: You Have No Monitoring System at All
If you cannot see real-time or daily generation data, you have zero visibility into whether your system is working. Blindness breeds problems.
What you are missing:
- No daily KWh data to spot sudden drops
- No alerts when inverter fails or goes offline
- No comparison to weather (cloudy vs. sunny production)
- No proof of performance for warranty claims
What to do: Older systems or cheap installers may not have provided monitoring. Contact Easy Solar to retrofit a monitoring module. It pays for itself within 2–3 years in avoided downtime.
What to Do If You See These Signs
Early action prevents small problems from becoming expensive ones.
Easy Solar Yield Optimization Service
- Drone Thermal Inspection
Thermal imaging identifies hot spots, failing modules, and string blockages. The temperature difference shows exactly where energy is being lost.
- String Analysis & IV Curve Testing
We measure voltage and current on each string to find diodes that have failed, loose connections, or degraded modules.
- Inverter & Wiring Audit
Check inverter efficiency, relay function, and all terminations for corrosion or loose connections.
- Cleaning & Maintenance
Professional panel cleaning, cable reseating, and component replacement if needed.
- Module Regrouping (if required)
Redistribute panel strings to maximize output if some modules are older or shaded.
- Yield Report & Recommendations
Written report with findings, estimated energy recovery, and cost-benefit analysis for upgrades.
Average recovery: 12–20% of annual energy loss. For a system losing 17.3% to poor maintenance, that was RM8,000–12,000 per year in lost revenue.
Get a Free Yield Optimization Audit
Our team will thermal scan your panels and identify exactly what is costing you energy.
Chat on WhatsAppFrequently Asked Questions
How often should I clean my solar panels in Sabah?
Sabah is tropical and humid. Rain cleans panels naturally, but lichen and salt spray (if you are near the coast) require cleaning every 6–12 months. For industrial areas with dust, clean every 3–6 months. Most homeowners can get by with annual cleaning in inland areas.
What if my inverter is out of warranty?
Inverters typically have 5-year warranties and can last 10–15 years with proper maintenance. Replacement costs RM8,000–15,000 depending on size, but the cost is offset by 5+ additional years of energy savings. Easy Solar can help with cost-effective upgrades.
Can humidity and salt air damage my panels?
Yes. Salt spray and high humidity accelerate corrosion of metal frames and connections. Coastal systems degrade 10–20% faster than inland systems. Panels are rated for 20–25 years, but may only reach 15–18 years near the coast. Regular cleaning and protective coatings (silicone conformal coating) extend lifespan.
How much does a yield optimization audit cost?
A free initial drone scan and string analysis takes 2–4 hours and includes a preliminary report. Full diagnostic work (thermal, IV curve, inverter testing) costs RM1,500–2,500. If you proceed with repairs, we credit 50% of the audit fee toward the work.