Frequently Asked Questions

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Can Lavee Solar be applied during installation?

Yes, Lavee Solar can be applied during installation. In fact, applying Lavee Solar at the point of installation is a smart strategy. It immediately protects the panels with its SmartShield coating, which helps repel dust and water, reducing soiling from day one. This means the system starts operating at peak efficiency right away and stays cleaner for longer, reducing the need for early maintenance and helping to maximise early-stage energy yield.

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Do solar panels need to be cleaned if it rains often?

Yes. Many believe that frequent rainfall eliminates the need for solar panel cleaning, but this is a misconception. While rain can wash away loose dust, it does not remove sticky residues, bird droppings, pollen, or mineral deposits. Over time, panels still accumulate layered soiling, which reduces efficiency regardless of climate. Although soiling is typically more severe in dry, dusty environments, a recent case study in a region with high annual rainfall showed that panels cleaned with Lavee Solar achieved an additional 8.19% yield.

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Is cleaning only needed in spring and summer?

 No. It is often assumed that solar panel cleaning and protection are only necessary during the sunnier months, but this is not the case. To maximise energy production and make the most of the limited irradiance available, panels should also be cleaned during less sunny seasons such as autumn and winter. Dirt, debris, and organic matter can accumulate year-round, reducing efficiency even when sunlight is scarce.

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How much does soiling/dirt affect solar panel efficiency?

After irradiance, soiling is the biggest factor reducing solar performance. In severe cases, dirty panels can lose up to 50% of their energy output. Typical annual soiling losses worldwide look like this: Open space (c.5%), Commercial (8-15%), Agricultural (15-30%), Industrial (30%), Desert Regions (up to 50%). In the UK, frequent rainfall helps, but losses still average 7-15%. Regular cleaning whether waterless or otherwise, keeps your system producing at its best.

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Is cleaning really worth the cost?

Absolutely. Ignoring cleaning costs more than you think. Soiling chips away at output year after year, and those losses compound. In high-soiling areas, panels can lose 30% or more of annual yield. Even in lower-yield regions like the UK, cleaning pays off. For just £0.42–£0.72 per panel (depending on Lavee Solar volume purchased), reducing soiling by 5% can deliver a 5–9x return on investment. That’s a small spend for a big gain.

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Why would I choose waterless cleaning over traditional water-based methods?

  • Water conservation: Waterless cleaning is especially valuable in regions facing water scarcity or drought, where water-based cleaning can strain limited resources. 
  • Accessibility: Waterless methods are practical for panels installed in hard-to-reach or remote locations where water supply is limited or logistics are challenging. 
  • Speed and efficiency in the cleaning process.  
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How effective is Lavee Solar compared to water-based cleaning?

Waterless cleaning is highly effective at removing dust and debris, especially when performed regularly. Lavee Solar has been proven to keep panels cleaner for longer due to its dirt and water repellent properties.

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How does Lavee Solar work?

Lavee Solar works using a simple 3-step process (Spray-Spread-Squeegee) that mixes and binds Lavee Solar with any soiling (dust, dirt, etc.), and then removes the mixture from the panel. All without needing an on-site water supply. Plus, it leaves behind a SmartShield coating that repels dust and water, keeping panels cleaner for longer.

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What is SmartShield?

SmartShield repellence works through the existence of two key attributes in the formulation of the product - electrostatic repulsion and passive anti-soiling coating. After cleaning with Lavee Solar, these mechanisms remain active on the surface of the panels for some time, keeping them free from dust, dirt and general debris.

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Does cleaning with Lavee Solar invalidate my solar panel warranty?

No. Lavee Solar is approved by many leading panel manufacturers. Always check your panel’s warranty terms and recommended maintenance procedures before cleaning.

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Is Lavee Solar environmentally safe to use?

Yes. Lavee Solar is biodegradable, eco-friendly, pH-balanced, free from wax, silicone & heavy solvents – safe for use in all locations.

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Can I perform waterless cleaning myself or should I hire professionals?

Both work. DIY waterless cleaning is possible for ground-mounted or easily accessible panels using proper tools, although we highly recommend following our ‘User guide’ for further details on equipment and application. For roof-mounted panels or large installations, professional services are safer and more efficient.

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Does Lavee Solar need diluting before use?

No. The product is Ready To Use and does not require any water at any stage (before, during or after).

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How often should I clean my solar panels with Lavee Solar?

The frequency depends on local conditions. In dusty environments or areas with little rainfall, more frequent cleaning is beneficial. Regular schedules (monthly or quarterly) are common for optimal performance. In the UK, where irradiation is relatively low and rainfall is prevalent, we generally recommend once or twice annually.

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What’s the best time of the day to clean panels?

Ideally clean when panels are cool - early morning, late afternoon, or overcast days. If cleaning during hot period is necessary, more Lavee Solar may need to be applied due to evaporation.

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Can Lavee Solar be used in the rain?

Avoid cleaning during heavy rain, as it can dilute the product. Light rain is generally fine and won’t affect performance.

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Does it work on heavily soiled panels?

Yes, although very heavily soiled panels (e.g. tree sap, cement, encrusted dirt) may need multiple applications. Once cleaned and protected, future maintenance is faster and easier.

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