Direct answers to the technical questions that can change which product belongs on your shortlist, with relevant products to help connect specifications to actual models.
Dry brushing reduces water use and can work for loose dust, while wet cleaning is more useful when grime, bird droppings or adhered contamination will not release dry. The PV module manufacturer’s cleaning guidance should decide what is permitted.
Read the answer →Robot vendors may quote MW/day, m²/hour or panels/hour, but those figures depend heavily on row geometry, travel between rows, setup and site soiling. For manual tools, crew productivity is better estimated from reachable area per setup and time per row.
Read the answer →Water use ranges from zero for dry systems to site-specific flow for water-fed brushes. For manual tools, measure actual hose or spray flow and multiply by cleaning time rather than relying on a vague “water-saving” claim.
Read the answer →Maximum slope is a machine-specific safety limit. With manual tools, the bigger question is whether the technician can work from a safe position without leaning onto modules or walking on a roof that requires fall protection.
Read the answer →Yes, a poor cleaning method can scratch or damage a module. Risk comes from bristle material, trapped grit, excessive pressure and dragging contamination across the glass—not simply from whether the tool is called a “solar brush.”
Read the answer →Battery runtime should cover a useful work block plus enough margin to finish a row safely, but daily productivity also depends on charge time and whether spare batteries can be swapped. Manual tools avoid battery planning unless the system uses powered pumps or brushes.
Read the answer →ROI compares the annual cost of the cleaning system with labor, water and production losses it can reduce. The key input is not “how much a robot costs”; it is how much soiling loss exists and how often the site must be cleaned to recover meaningful energy.
Read the answer →MW/day is a productivity shorthand: the amount of installed PV capacity the vendor says can be cleaned in a day. It is not a physical cleaning-rate unit unless you also know panel density, row layout, workday length and assumptions behind the claim.
Read the answer →Rooftops prioritize portability, roof-edge safety and short setup time; utility-scale sites prioritize huge daily coverage, row transitions and low labor per MW. A tool that is ideal for one can be inefficient or unsafe for the other.
Read the answer →Cleaning equipment needs its own maintenance: inspect brushes, bearings, drive parts, batteries, hoses, seals and control hardware on the schedule specified by the maker. Manual tools are simpler but still need clean bristles and sound pole locks.
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