Why pure water is essential for solar glass
Cleaning solar modules isn't a job for shortcuts. Using tap water or a standard garden hose is a mistake that can permanently damage your installation. VoltFarm uses only 100% demineralised water, produced by reverse osmosis directly on board our mobile units.
Tap water contains limescale, chlorine and dissolved minerals. As it dries in the sun it leaves behind fine white mineral deposits that scatter sunlight away from the silicon cells.
The risk of chemical detergents
Some owners assume glass cleaner speeds things up. It's actually the opposite: surfactants leave an invisible but sticky chemical film on the glass.
That residue acts like a magnet for dust: within days, pollen and traffic grime settle back twice as fast, wiping out the benefit of the clean.
Is your installation producing at its full potential?
Don't let airborne grime eat into your return on investment. Request a free diagnostic and we'll plan a visit using pure demineralised water.
The natural cleaning power of osmosis water
Mineral-free water naturally seeks to rebalance itself by absorbing whatever impurities it comes into contact with. That makes it a highly effective cleaning agent, capable of lifting greasy deposits and bird droppings without any mechanical aggression.
Paired with soft-bristle brushes, it dries perfectly streak-free and preserves the panels' original anti-reflective coating.
Our protocol, in numbers
- Water conductivity: under 2 µS/cm (versus 300-600 µS/cm for typical UK tap water).
- Temperature: ambient, no thermal shock to the tempered glass.
- Pressure: low, under 3 bar, compatible with all manufacturer warranties.
- Water use: roughly 3 litres of pure water per panel, so 60-90 litres for a standard residential installation.