A photovoltaic system needs minimal but consistent maintenance. Two interventions per year ensure nominal performance for 25+ years.
Spring maintenance (March-April)
- Cleaning the panels: demineralized water + soft brush. Winter dust, pollen and deposits reduce production by 5-10%.
- Checking the assembly structure: screws, supports, seals. Weaknesses may occur after the winter frost.
- Visual inspection of connections: MC4, junction boxes, AC/DC cables. Look for blackening or signs of corrosion.
- Insulation test: with a multimeter, measure the panel-mass insulation resistance. Must be >40 MΩ.
Autumn maintenance (September-October)
- Preparation for winter: check all connections withstand freeze-thaw.
- Cleaning leaves + nests: birds build nests under panels in summer — remove them.
- Inverter check: error logs, fan temperature, output wave quality.
- Backup settings: saves inverter settings via VictronConnect or manufacturer's app.
Monthly checks (from the app, no climbing on the roof)
- Daily production vs historical average (alert if it drops above 10%)
- Battery state of charge (between 20-95% ideal for LiFePO4)
- Current errors or warnings in the inverter
- Battery charge/discharge behavior
Alarm signals
Call a specialist immediately if:
- Production suddenly drops by 30%+ for no apparent reason (new shade, weather)
- Inverter displays critical error code (E13, E18, F90, etc.)
- See cracks or stains on panels
- You smell electricity (very dangerous, turn off the system immediately)
Useful equipment for maintenance
- Digital multimeter (40-150 lei)
- Brush with telescopic tail (60 lei)
- Monitoring application (VictronConnect, free)
- IR device for detecting hot spots (~500 lei)
EcoSolaris provides annual maintenance contracts for systems installed by us or other installers. Contact us for a personalized program.
I have Victron Multiplus II for 2 years and zero problems. I confirm the quality
I hope that the article reaches those who are still hesitating. 100% worth the investment
very well documented. congratulations to the team
Hello, I saw the article and I want a personalized offer. What email do I contact you on?
Your articles are always informative. Keep going!
Hello! Prices are updated monthly on the website. For the offer valid today, we recommend you call us directly.
For the residents of the block, there are solutions with mini panels on the balcony (plug-and-play) with a power of 800W-2kW. It does not require special authorizations.
Congratulations, the article has all the important information. Compared to other sites, you are much more detailed
I hope that the article reaches those who are still hesitating. 100% worth the investment
Hello! Prices are updated monthly on the website. For the offer valid today, we recommend you call us directly.
We are happy that we could help you. If you need technical advice, we are here!
The article confirms why I chose photovoltaic 3 years ago. The best financial decision!
I live in an apartment block, how can I benefit from solar energy?
Hello! For a 5kW system with a 10kWh battery, the total investment is around 7000-9000 EUR turnkey. We can make a detailed offer.
We are happy that we could help you. If you need technical advice, we are here!