Solar panels in Saudi Arabia face the most severe soiling challenge of any major solar market: haboob dust storms deposit thick layers of fine sand and clay particles, and coastal cities add salt-spray onto the settled dust to create a hard, adhesive film. Without regular cleaning, a Saudi rooftop solar system loses 15–30% of its design output within 4–6 weeks during haboob season. Professional cleaning with demineralised water (not tap water, which leaves calcium deposits) restores 100% of the lost generation.
What's Included
Panels washed with water purified to under 50 ppm TDS (reverse osmosis unit on our cleaning vehicles). Using normal Riyadh tap water (600–900 ppm TDS) leaves a white calcium film that actually increases soiling rate — demineralised water evaporates without residue.
Panels in Jeddah, Khobar, and coastal Dammam develop hard salt deposits from sea spray that standard brushing cannot remove. We use a dilute citric acid pre-rinse (pH 4.5) to dissolve salt crystals before demineralised water wash.
Soft-bristle carbon fibre brush cleaning for panels in locations where water use must be minimised or access for water equipment is limited. Less effective than wet wash but maintains 85–90% of output between full wet washes.
Scheduled cleaning programme: 24 bi-weekly clean visits per year for coastal/desert systems, or 12 monthly visits for inland systems with lower soiling rates. Performance monitoring between visits to detect abnormal yield drops.
During cleaning visits: visual inspection for cracked cells, delamination, hotspots (detected with thermal camera), loose connectors, and mounting hardware integrity. Electrical insulation resistance check annually.
Inverter performance data review with each cleaning visit — compare actual vs expected yield to identify inverter, panel, or string faults before they cause significant generation loss.
How It Works
Pricing Guide
One-time clean, residential (10kWp, 18–20 panels): SAR 250–450 (Riyadh), SAR 350–600 (Jeddah coastal — salt removal extra). Annual contract (12 monthly cleans, Riyadh): SAR 1,800–3,000. Annual contract (24 bi-weekly cleans, Jeddah coastal): SAR 4,500–7,000. Panel inspection + thermal imaging (per annual visit): SAR 400–700 additional. Inverter health check: SAR 200–400.
Frequently Asked Questions
How often should solar panels be cleaned in Saudi Arabia?
In Riyadh and inland cities: once per month is the minimum to maintain 90%+ of design yield. During peak haboob season (March–June), bi-weekly cleaning recovers an additional 5–8% annual yield. For Jeddah, Khobar, and coastal Dammam: bi-weekly cleaning is the minimum — salt deposits accumulate quickly and are far more damaging to long-term panel glass integrity than inland dust.
Can I clean solar panels myself with a garden hose?
The garden hose water will work adequately for loose dust but has three problems in Saudi Arabia: (1) tap water TDS of 600–900 ppm (Riyadh) leaves a calcium film that increases soiling adhesion — you may actually reduce output versus an uncleaned panel after multiple tap water washes, (2) garden hoses lack the brush agitation needed to remove adhered salt deposits (coastal) or hardened clay dust (haboob deposits), (3) tap water pressure can force water into junction box seals if aimed directly. Use demineralised water or rely on professional cleaning.
What is the revenue impact of not cleaning my Riyadh solar panels?
A 10kWp Riyadh system that is never cleaned generates approximately 15,000 kWh/year against a design yield of 19,000 kWh — a 4,000 kWh loss worth SAR 3,000–4,500 per year at current tariffs. Annual cleaning contract cost: SAR 1,800–3,000. Net benefit of maintaining a cleaning contract: SAR 1,000–2,500 per year — the contract pays for itself each year.
How do I know if my solar panels are underperforming due to soiling?
Compare your inverter's daily generation (kWh) against the design estimate for the same day (your installer should provide a monthly generation target table). If actual generation is more than 15% below the design estimate on a clear day with no shading changes, soiling is the most likely explanation. The Huawei FusionSolar and SolarEdge monitoring apps allow this comparison directly from your phone.