Frequently Asked Questions

Relying on rain to clean solar panels is like expecting rain to wash your car windshield. Rain might rinse away loose airborne dust, but as rainwater evaporates, it bakes in atmospheric contaminants and mineral scale, leaving stubborn residue behind. Mechanical agitation with pure de-ionized water is required for true optical clarity.

Absolutely not. We use exclusively 100% laboratory-grade 000 PPM de-ionized (DI) pure water with zero soaps, detergents, or abrasive chemicals. Leading solar manufacturers (SunPower, Tesla, Enphase, Canadian Solar) specifically stipulate using only pure water to avoid degrading anti-reflective glass coatings.

Yes! In addition to solar panel maintenance, Panel Wash Pro provides professional pure DI water window washing (reaching up to 3 stories without ladders) and heavy-duty pressure washing / soft wash for driveways, patios, walkways, and building exteriors throughout the Bay Area.

We recommend cleaning your panels at least 1 to 2 times per year in Northern California. Arrays near major freeways, industrial zones, agricultural areas, or coastal fog corridors benefit from quarterly cleaning to prevent permanent mineral scaling.

Yes, Panel Wash Pro carries comprehensive $2,000,000+ commercial general liability insurance and workers' compensation. All field technicians are OSHA-compliant and strictly adhere to commercial fall-protection harness protocols.

Pricing depends on the number of panels, array accessibility, roof pitch, and level of soiling. We offer instant transparent quotes with zero hidden fees. Call (415) 818-7595 or request a free online estimate in under 60 seconds.