PanelAudit — Is Your Solar System Underperforming?<br>Free solar performance diagnosis<br>Your solar panels are probably losing 10–30% of their output.<br>Most solar owners don't know their system is underperforming. Enter your system details below — we'll identify likely faults and tell you whether you need a professional inspection. Free, no signup.<br>Diagnose my system free<br>Solar Loss Checker<br>Estimate how much energy your solar system may be losing, identify likely faults, and track your health over time.<br>System size (kW)<br>System age (years)<br>LocationSelect your locationAlabama (AL)Alaska (AK)Arizona (AZ)Arkansas (AR)California (CA)Colorado (CO)Connecticut (CT)Delaware (DE)Florida (FL)Georgia (GA)Hawaii (HI)Idaho (ID)Illinois (IL)Indiana (IN)Iowa (IA)Kansas (KS)Kentucky (KY)Louisiana (LA)Maine (ME)Maryland (MD)Massachusetts (MA)Michigan (MI)Minnesota (MN)Mississippi (MS)Missouri (MO)Montana (MT)Nebraska (NE)Nevada (NV)New Hampshire (NH)New Jersey (NJ)New Mexico (NM)New York (NY)North Carolina (NC)North Dakota (ND)Ohio (OH)Oklahoma (OK)Oregon (OR)Pennsylvania (PA)Rhode Island (RI)South Carolina (SC)South Dakota (SD)Tennessee (TN)Texas (TX)Utah (UT)Vermont (VT)Virginia (VA)Washington (WA)West Virginia (WV)Wisconsin (WI)Wyoming (WY)New South Wales (NSW)Victoria (VIC)Queensland (QLD)South Australia (SA)Western Australia (WA)Tasmania (TAS)Northern Territory (NT)Australian Capital Territory (ACT)South East EnglandSouth West EnglandEast of EnglandWest MidlandsEast MidlandsNorth West EnglandNorth East EnglandYorkshire & The HumberLondonWalesScotlandNorthern IrelandAndalucíaCataluñaComunidad de MadridComunidad ValencianaCastilla-La ManchaCastilla y LeónGaliciaPaís VascoAragónRegión de MurciaExtremaduraCanariasIslas BalearesNavarraCantabriaAsturiasLa Rioja<br>Current annual production (kWh) — optional<br>Panel manufacturer — optionalSelect manufacturerTesla SolarSunPowerLG SolarCanadian SolarREC SolarJA SolarJinko SolarLONGi Solar<br>Inverter brand — optionalSelect inverterEnphaseSolarEdgeSMAFroniusSungrowGenerac (US)TeslaHuaweiGoodWeSolaX PowerGivEnergyVictron EnergyOther / Unknown<br>Check my solar systemNo personal data stored. Results are estimates based on conservative modelling.
Why solar systems underperform<br>Multiple factors reduce solar output over time. Understanding them helps you decide whether action is needed.<br>100%90%80%05yr15yr25yrNormal (0.5%/yr)Accelerated (1.2%/yr)Natural degradation<br>0.5–0.8% per year is normal. Faster decline signals a problem.
Hotspot detected — thermal imaging viewHotspots & cell damage<br>Invisible to the eye. Detectable only via thermal imaging.
100%~40%Partial shading — tree growth reduces outputShading & soiling<br>New tree growth or dirt can reduce output 5–30%.
How a thermal inspection works<br>Professional inspections find problems you can't see — in under an hour.
Drone scan<br>A thermal-equipped drone captures infrared images of every panel on your roof.
Defect detection<br>Thermal anomalies reveal hotspots, micro-cracks, and soiling invisible to the eye.
Report & action<br>You get a clear report with loss estimates, cause analysis, and next steps.
Quick assessment<br>Should I get a thermal audit?<br>Answer 6 quick questions to find out if a professional thermal inspection is worth the investment for your system.<br>Take the assessment
Find inspection providers<br>Connect with certified thermal inspection and drone audit providers worldwide.<br>Browse all providers<br>US · UK · Australia · Spain
Learn about thermal drone inspection →
Common solar performance issues<br>→Why solar panels underperform→Solar hotspots explained→Inverter efficiency loss→Panel soiling effects→When to get a thermal inspection→Solar panel degradation rates
Based on conservative solar performance modelling and published degradation data<br>NRELIEA-PVPSSunSpecPVsyst+ published research<br>Updated May 2026 · Structured performance modelling<br>How we calculate →