Solar Panel Cleaning: More Light for Your System, Support for Generation

Rooftop solar generates electricity from existing space

A rooftop solar system turns built-up space into a source of renewable electricity without requiring additional land for the array. Israel’s Ministry of Energy and Infrastructure describes benefits that include renewable electricity, distributed generation, and producing power closer to consumers ^[1]. For a property owner, this means generating electricity on site, subject to weather, building conditions, and system design.

The electricity may be used at the property, and its practical value depends on usage, system size, and the applicable arrangement. Maintenance, including cleaning when deposits build up, helps keep panels in suitable condition to receive light.

How self-consumption may support your electricity bill

When a property uses some solar electricity as it is generated, it may need to purchase less electricity from the grid during those hours. Local generation can therefore support bill savings, depending on how generation hours align with usage and on the system’s terms. Cleaning supports the panels’ exposure to light; it does not by itself reduce a household’s electricity consumption.

Electricity not used on site may be exported to the grid under the connection route and arrangement in force. Israel Electricity Authority decision 71004, dated May 14, 2025, addresses photovoltaic systems for self-consumption and transfer of surplus to the grid ^[2]. Terms and tariffs may change and may depend on eligibility, so ask the installer or responsible qualified provider what applies to a particular system.

The environmental contribution of distributed generation

Solar generation relies on a renewable energy source. The Ministry of Energy describes wider system benefits as well: multiple generators distribute electricity production, while producing power closer to consumption may reduce the need for additional grid infrastructure and make use of built space ^[1]. These benefits arise across many systems together.

At a property, some electricity is generated on site instead of relying only on grid electricity. How much is actually used on site varies, as does the contribution to consumption and bills.

Cleaning restores light exposure and supports generation

Dust, bird droppings, and other deposits can interfere with light reaching panels. The U.S. National Renewable Energy Laboratory’s (NREL) Best Practices for Operation and Maintenance of Photovoltaic and Energy Storage Systems, third edition (2018), says soiling reduces PV-array energy output and advises considering local conditions when planning cleaning ^[3]. Removing deposits can help address generation losses caused by soiling and support the system’s ongoing operation.

The right cleaning frequency varies with dust, nearby works, birds, rainfall, and other site factors. NREL advises considering local conditions and the cost-benefit of cleaning; expected rain may also affect timing ^[3]. Set a schedule that suits the roof and panel condition rather than relying on one interval for every site. The change in generation after cleaning depends on the amount of soiling and the system circumstances.

A cleaning method suited to the panels and roof access

Cleaning that follows manufacturer guidance helps remove soiling while protecting system components. NREL advises avoiding methods and substances that may cause damage, including high-pressure water, solvents, abrasives, and harsh detergents ^[3]. Roof access and fall hazards also matter; do not climb onto a roof or handle electrical equipment without appropriate authorization and qualifications.

Cleaning addresses the panels; it does not include inverter, cable, or connection work, and it does not diagnose reduced generation. If the system shows an alert, visible damage, or an unusual change in production data, contact the installer or a qualified professional. MOLO CLEAN provides solar-panel cleaning and does not install or repair electrical equipment.

When should you arrange panel cleaning?

A visual check from a safe access point can help identify substantial buildup, an unusually dusty site, or localized debris such as bird droppings. If you notice this kind of soiling, ask whether cleaning suits the system and manufacturer guidance. You do not need to climb onto the roof to start the check.

To arrange cleaning, share the property type, panel access details, and your needs with MOLO CLEAN. We bring more than eight years of cleaning experience. Share relevant safety and manufacturer instructions in advance. For questions about system performance, electrical work, grid connections, or surplus payments, contact the appropriate installer or qualified provider. For service enquiries: 0539306139.

Frequently asked questions