Are there specific cleaning products recommended for solar panels?

Yes, solar panels require specialised cleaning products to safely remove dirt, biological growth, and industrial residues without damaging components. Conventional cleaners containing acids, bleaches, or solvents can degrade panel coatings and frames.

---

Recommended cleaning products

1. Biocide-based cleaners (e.g., GK PRO):

• Function: Remove algae and biofilms through surfactant action.
• Advantage: Biodegradable and safe for grazing animals after drying.

1. Non-toxic foaming concentrates (e.g., Sol Clean):

• Feature: Removes bird droppings, pollen, and cement dust.
• Benefit: Cost-effective concentrated formula reduces chemical usage.

1. Targeted chemical agents (e.g., Chemitek range):

• Solar Lichen Removal Agent: Removes organic growth on shaded panels.
• Cement Removal Agent: Clears construction residue without abrasives.
• Paint Removal Agent: Addresses accidental overspray damage.

---

Critical considerations for UK users

• Environmental safety: Opt for biodegradable formulas compliant with UK water regulations.
• Roof pitch: Sloped arrays may self-clean but require annual manual cleaning in high-debris areas like farmland or coastal regions.
• Hard water: Use demineralised water with cleaning solutions to prevent limescale streaks.

---

Common mistakes to avoid

1. Using pressure washers – risks microcracks in glass.
2. Ignoring manufacturer guidelines – some warranties specify approved cleaning agents.
3. Cleaning during peak sunlight – causes rapid drying and streaking.

---

Practical application examples

• Small residential systems: Gardiner Water Through Pads with warm water for budget-friendly maintenance.
• Commercial solar farms: Foam sprayer systems paired with concentrated cleaners for large-scale efficiency.
• Agricultural sites: Biocide treatments to prevent algae in shaded, damp environments common across UK pastureland.