Renovation & Restoration
Ageing PV systems lose yield silently. Eturn diagnoses underperformance, designs a targeted upgrade programme, and restores your asset to — or above — its original production potential.
Recover what your system has lost
Every PV installation degrades over time — but degradation beyond the expected 0.5% per year almost always has a fixable cause. Faulty bypass diodes, corroded connectors, cracked modules, and ageing inverters quietly drain yield year after year without triggering obvious alarms.
Eturn's renovation and restoration service begins with a forensic technical assessment. We quantify the performance gap, identify every root cause, and design a targeted upgrade plan that restores output efficiently — extending asset lifetime and protecting long-term returns.
Diagnosis through to delivery
We don't just replace parts — we rebuild performance. Every renovation is engineered from real data and executed to the same standard as a new installation.
Thermal & Electroluminescence Imaging
Drone-mounted thermal cameras and EL testing identify failing cells, delamination, PID-affected strings, and hotspots invisible to standard monitoring.
IV-Curve & Performance Analysis
String-level IV-curve testing benchmarks actual vs. expected output and pinpoints the exact modules and components degrading system performance.
Safety & Compliance Inspection
We check insulation resistance, earthing continuity, arc fault protection, and grid protection relay settings — flagging any safety deficiencies for immediate remediation.
Module & String Replacement
Selective replacement of underperforming modules, failed bypass diodes, and corroded junction boxes — re-matched to existing string voltage and current profiles.
Inverter Upgrade & Replacement
End-of-life inverter swap-outs, firmware upgrades, and reactive power compensation upgrades — all handled without interrupting the rest of the system.
Monitoring Reconnection
Where monitoring has lapsed or was never installed, we commission the ETURN Live platform so performance is tracked from the day renovation is complete.
From diagnosis to restored performance
We treat every renovation as a new engineering project — beginning with data, not assumptions, and ending with a verified performance improvement.
Performance Baseline
We extract historical production data and compare it to what the system should have generated based on irradiance records — quantifying the exact performance gap.
Technical Inspection
Full on-site assessment including thermal imaging, IV-curve testing, visual inspection of modules and cabling, and inverter diagnostic readout.
Root Cause Report
We produce a prioritised defect register with cost-benefit analysis for each intervention — so you can make an informed decision about the scope of renovation.
Renovation Execution
Approved works are carried out by our certified installation crews, using matched replacement components sourced through our procurement network.
Post-Renovation Validation
We re-run IV-curve testing and performance benchmarking after works are complete to verify yield recovery meets our stated estimate.
Why renovation is often better value than replacement
Recover lost production
On average, Eturn-renovated systems recover 22% of lost annual yield. For a 100 kWp system that's tens of thousands of kWh — and euros — back on the table each year.
Extend asset horizon
A properly renovated system can operate for 10+ additional years beyond its original design life — dramatically improving the ROI on your initial capital investment.
Protect asset value
Lenders, insurers, and acquirers assess technical condition when valuing solar assets. A renovation report and restored production history materially improves asset bankability.
Fraction of replacement cost
Targeted renovation costs a fraction of full system replacement — often with a payback period of under two years when yield recovery is factored in.
Is your system underperforming?
Share your monitoring data or site address and we'll run a preliminary performance analysis to determine whether a renovation would be worthwhile.