Lahore's dust, construction debris and winter smog settle on solar panels quickly. A dirty array produces less power, and loose connections or failing earthing can become a safety risk. Regular maintenance keeps your system working and protects your warranty.
What's included
| Task | What it covers | Why it matters |
|---|---|---|
| Panel washing | Soft brush and clean water, no harsh chemicals or pressure jets | Dust and smog residue block sunlight |
| Visual inspection | Cracks, hot spots, discolouration, bird droppings, debris under panels | Damaged panels lose output and may be a warranty claim |
| Connector and cable check | MC4 connectors, cable insulation, conduits, cable ties | Loose or burnt connectors can cause fires |
| Structure check | Bolts, clamps, rust, anchoring to roof | Storms can lift poorly fixed panels |
| Earthing test | Earth resistance and continuity | Protects people and equipment from faults and lightning |
| Inverter service | Error log, fan and vents, dust filters, firmware, display readings | Inverter faults are the most common cause of lost output |
| Battery check (hybrid) | Terminals, ventilation, state of health readings | Weak batteries reduce backup time |
| Output report | Comparison of generation with previous months | Spots problems early |
When you need it
- Output in your inverter app has dropped without a change in weather
- After dust storms, construction nearby or the smog season
- Inverter is showing error codes
- Before summer, when you rely on solar most
- Your system is a few years old and has never been checked
Step-by-step process
- Book a visit. Share your system size, panel count, roof access and inverter model.
- Before readings. The technician notes generation and inverter status.
- Safety shutdown. The system is isolated following the inverter's shutdown sequence.
- Cleaning. Panels are washed with a soft brush and clean water, ideally in the early morning or evening when panels are cool.
- Inspection. Connectors, cables, structure and earthing are checked.
- Inverter service. Vents cleaned, error log read, settings checked.
- Restart and after readings. Generation is compared with the before readings.
- Report. You get a written note of findings and any repairs needed.
Approvals and documents
No permits are needed for cleaning or routine maintenance. Keep a record of each service, since some warranties ask for proof of proper maintenance. If repairs involve replacing an inverter or changing system size and you have a grid connection, check with your installer whether LESCO needs to be informed under your agreement.
What affects the cost
Maintenance is usually priced per visit or as an annual contract with a set number of visits. The price depends on:
- Number of panels and system size
- Roof height, access and whether panels are on an elevated structure
- Water availability on the roof
- Whether the visit includes earthing tests and inverter servicing or cleaning only
- Distance from the provider's base
- Repairs and parts, which are usually extra
Get a written list of what each visit includes.
Questions to ask the provider
- Do you use soft brushes and clean water only?
- Will you shut the system down safely before cleaning?
- Do you test earthing, or only clean?
- Will you give me before-and-after readings?
- Are your technicians trained on my inverter model?
- What does the annual contract cover, and what is extra?
- Will your work affect my panel or inverter warranty?
Red flags
- Pressure washers or detergents on panels
- Cleaning in the midday sun on hot glass
- Technicians walking on panels
- No shutdown before work on wiring
- "Cleaning only" sold as full maintenance
FAQs
How often should panels be cleaned in Lahore? It depends on your area, nearby construction and the season. Watch your generation readings: when output drops on clear days, it is time to clean. Many owners clean more often in smog and dust seasons.
Can I clean the panels myself? Yes, if you can reach them safely. Use clean water and a soft brush, do not walk on the panels, and avoid cleaning when the glass is hot.
Why is my output low even after cleaning? Possible causes include shading, a faulty string, a loose connector, inverter settings or a failing panel. A technician should check readings string by string.
Does hard water damage panels? Hard water can leave spots on glass. Some providers use filtered water. Ask what they use.
Sources
No external figures or legal requirements are cited on this page. Ask providers for a written scope and price per visit or per contract.