Prevention is power: Keeping your PV Park running at peak efficiency
Preventive maintenance of PV (photovoltaic) parks is a structured program of inspections, tests, and servicing carried out at regular intervals to keep the solar power plant operating at optimal performance, minimize downtime, and extend asset life. It goes beyond fixing problems after they occur (corrective maintenance) by anticipating and avoiding failures.
The service includes:
Modules (Solar Panels)
- Visual inspection: Look for cracks, delamination, hotspots, soiling, or discoloration.
- Cleaning: Regular washing to remove dust, bird droppings, or pollen that reduce efficiency. Frequency depends on climate and location.
- Electrical testing: IV curve tracing and thermography to detect underperforming modules.
Inverters
- Firmware updates and parameter checks.
- Inspection of fans, filters, fuses, and cooling systems.
- Thermal imaging to spot overheating components.
- Torque checks on electrical connections.
Transformers & Switchgear
- Oil sampling and testing (for oil-filled transformers).
- Insulation resistance testing.
- Thermal scans for hotspots in breakers, relays, and busbars.
- Functional checks of protection relays and safety systems.
Cabling & Electrical Connections
- Visual inspection for insulation damage, corrosion, or rodent bites.
- Insulation resistance measurement.
- Tightness checks on connections and terminations.
Mounting Structures
- Mechanical integrity checks (bolts, joints, corrosion, alignment).
- Grounding/earthing system verification.
Monitoring & SCADA Systems
- Ensure communication systems (fiber, wireless, ethernet) are functional.
- Calibrate sensors (irradiance, temperature, wind).
- Compare actual vs expected output to detect early performance losses.
Site & Environment
- Vegetation control to prevent shading and fire hazards.
- Drainage checks to avoid flooding or erosion.
- Security systems (fencing, CCTV, alarms) inspection.
Documentation & Reporting
- Maintain detailed maintenance logs.
- Use CMMS (Computerized Maintenance Management System) for scheduling.
- Prepare monthly/quarterly reports with KPIs (PR – Performance Ratio, availability, downtime hours).
why zephiros
we are Reliable and efficient
We combine deep domain experience with a service mindset to support your MV substation needs with clarity, consistency and reliability.
24/7/365
TECHNICAL SUPPORT ALL YEAR ROUND
Continuous monitoring & rapid response capability that ensures operational continuity for mission-critical MV substations.
27+
YEARS OF EXPERIENCE
Long-term involvement in complex wind farm and MV substation environments.
7+
PARTNERS IN 7 COUNTRIES
Expanding our activities across countries around the world.
experts
Your direct point of contact for MV substation maintenance