Solar Panel Repair and Solar Power Plant Maintenance in Shiraz
A plant that has run for a few years slowly loses output: dust settles on the panels, connectors heat up in the sun, a string drops out and nobody notices. Arshid Solar’s technical team, together with Aali Electronic, repairs solar panels and services home, agricultural and industrial plants in Shiraz and Fars province — from a 1 kW rooftop system to plants of several hundred kilowatts.
Online repair request: send the device details and the problem on WhatsApp, or use our repair request form (Persian), and our technicians will call you.
Is your plant producing less than usual?
Send the plant capacity, inverter brand and a photo of the inverter screen or error code; we tell you the likely cause and plan a visit.
Signs your plant needs service or repair
- Daily production (kWh) is clearly lower than in the same month last year
- The inverter shows Isolation, Ground Fault or PV Voltage errors, or starts late in the morning
- The voltage or current of one string is lower than the others
- Brown spots, bubbles, cracks or burn marks on the front or back of a panel
- MC4 connectors or the combiner box get hot, smell or change colour
- Panels have not been cleaned for a long time and are covered with dust, droppings or leaves
What can be repaired — and what cannot
Not every panel fault is repairable, and we tell you honestly what is worth repairing:
| Fault | Repairable? | What we do |
|---|---|---|
| Burnt or loose MC4 connector | Yes | Replace with a standard connector, crimped correctly |
| Junction box and bypass diode | Yes | Replace the diode and reseal the box |
| String wiring and terminals | Yes | Repair or replace DC cable, terminals and string fuses |
| Broken or cracked glass | Usually not | Replacement panel of equal power; glass repair is not durable or safe |
| Hot spots and burnt cells | Usually not | Find the cause (shade, diode, dirt) and replace the panel if needed |
| Output loss from dirt | Yes | Proper panel cleaning |
If a panel must be replaced, we supply a matching panel compatible with the string from the Arshid shop.
Periodic service of solar plants
- Panel cleaning with low-mineral water and a soft brush, early morning or evening (never on hot panels)
- Visual inspection of panels, mounting structure, bolts and cables
- Measuring open-circuit voltage and current of each string and comparing them
- Checking connectors, fuses, switches and surge arresters in the DC and AC boxes
- Inverter check: error log, fans, ventilation and settings
Inverter faults are repaired in our own workshop — see inverter, UPS and battery repair.