Inverter diagnostics
Find the weak inverter before it costs another season. We review inverter logs, alarms, efficiency and temperature behaviour, then confirm on site with electrical and thermal checks. Comparing similar inverters on the same days shows which unit is the outlier.
- Frequent trips, derating or alarms
- One inverter produces less than its twins
- Spares or OEM support are hard to get
- After a firmware or component change
- Pinpoints the unit that is dragging output down
- Supports claims against the manufacturer
- Helps plan spares and replacements
How we do it, step by step.
Export alarm history, daily energy and efficiency data from each inverter.
Compare inverters of the same size on the same days and weather.
Inspect cooling, DC and AC terminations, and measure voltages and temperatures.
State the likely cause, the evidence, and what to do next.
- A ranking of inverters by performance
- Likely causes for trips and derating
- A repair, replace or monitor recommendation for each unit
Outcomes depend on what the inspection finds. Possibilities are labelled as such in every report.
- Efficiency and availability charts
- Alarm analysis
- On-site inspection photos and readings
Instruments: Power analyser, clamp meters, thermal camera, data-logger access
Two weak inverters found by tracking daily efficiency
After the weak inverters were replaced and a claim was made on the manufacturer, the plant gained about 1% in performance.
Read the case →Other services
IV curve tracing
Measure what each string and module can really deliver.
See the process and outcomes →
Thermography
See heat problems from the ground or from the air.
See the process and outcomes →
Electroluminescence (EL) imaging
Look inside cells for cracks and bad solder joints.
See the process and outcomes →Want this test on your plant?
Send an enquiry and we will prepare a checklist for your site.