5 Best Velux Solar Thermal Panels Compared for Home Water Heating (2026)

By Ethan Brooks

Updated November 2026

Shoppers searching for velux solar thermal panels usually want one of two things: a clear sense of which collector suits their roof and hot water load, or a way to sort through the mix of Velux-branded products and third-party options that show up under similar keywords. This guide narrows the field to five products and explains where each one fits. The selection criteria were product relevance to solar thermal water heating, clarity of manufacturer specifications, brand reputation, and the patterns owners tend to describe in their feedback.

Our Top Picks

Before the individual products, a note on scope. Most listings that surface for velux solar thermal panels are small photovoltaic modules designed to charge batteries in motorized shades, not thermal collectors that heat water. That distinction matters. A solar thermal collector circulates a fluid through a glazed absorber to heat domestic hot water, and it is sized in square feet of aperture area. The products below are the small solar charging panels that pair with Velux-style motorized blinds and skylight shades. They are useful if you want to automate window coverings without running wiring. If your goal is a water heater, read the Buying Guide section first, then consult the related articles linked throughout.

Quick Comparison

1pcs Solar Panel 1.3W5.5V, Suitable for Electric Blinds Smart Blinds, USB-C Plug Mobile Solar Power Generation, Installed on Window Solar Power Panel

1pcs Solar Panel 1.3W5.5V, Suitable for Electric Blinds Smart Blinds, USB-C Plug Mobile Solar Power Generation, Installed on Window Solar Power Panel

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Best for: Single window blind charging

This suits someone with one motorized blind or shade who wants to keep its battery topped up without a power outlet nearby. It is a small, low-output panel, so it fits light-duty use rather than powering several devices.

Key specs:

• Rated output: 1.3W at 5.5V (per listing name)
• Connector: USB-C plug
• Mounting: window-mounted

Pros

• Simple single-unit setup with no wiring
• USB-C output matches common charging cables
• Compact footprint for window frames

Cons

• Low wattage limits charging speed in cloudy conditions
• Only one panel, so larger shades may need more capacity

Bottom line: A good first pick for a single smart blind where the window gets reasonable daytime sun.

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1PCS Solar Panels 3.4W 6V Charge for Motorized Blinds with USB-C Connector for Lithium Battery Operated Shades

1PCS Solar Panels 3.4W 6V Charge for Motorized Blinds with USB-C Connector for Lithium Battery Operated Shades

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Best for: Motorized blinds, one unit

This is aimed at owners of lithium battery-operated shades who want a slightly higher output than a basic 1.3W panel. It works best where the window receives several hours of direct sun.

Key specs:

• Rated output: 3.4W at 6V (per listing name)
• Connector: USB-C
• Application: lithium battery-operated motorized shades

Pros

• Higher stated output than the 1.3W option
• Matches lithium battery shade charging needs
• USB-C connection is straightforward to route

Cons

• Still a single small panel, so charging depends on sun exposure
• Not suitable for powering household appliances

Bottom line: Best for owners who want a step up in charging capacity for one lithium-battery shade.

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ZSTARRFramed Honeycomb Blinds for Skylight & Inclined Windows Light Blocking Design for Insulation, Privacy & Optional Solar Panel Motorized Blackout Cellular Skylight Shades Custom Starry Sky

ZSTARRFramed Honeycomb Blinds for Skylight & Inclined Windows Light Blocking Design for Insulation, Privacy & Optional Solar Panel Motorized Blackout Cellular Skylight Shades Custom Starry Sky

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Best for: Skylights and inclined windows

This is a shade product rather than a standalone panel, offered with an optional solar panel. It fits people who want blackout, insulation and privacy for a skylight, with motorized operation powered by solar where they choose that option.

Key specs:

• Type: framed honeycomb (cellular) skylight shade
• Design: light blocking, insulating, privacy
• Option: motorized with optional solar panel

Pros

• Designed for inclined windows and skylights
• Combines light blocking with insulation
• Solar option removes the need for a nearby outlet

Cons

• Custom sizing means fit must be measured carefully
• Solar charging depends on the skylight receiving direct sun

Bottom line: Pick this if your need is a skylight shade with solar-assisted motorization, not a bare panel.

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Solar Panels 5W 5V Charge for Motorized Blinds with USB-C Connector | Powers Smart Blinds, RV Shades & DIY Automation, Lithium Battery Operated Shades

Solar Panels 5W 5V Charge for Motorized Blinds with USB-C Connector | Powers Smart Blinds, RV Shades & DIY Automation, Lithium Battery Operated Shades

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Best for: Budget motorized blind setups

This is a practical choice for shoppers who want a 5W panel for smart blinds, RV shades or small DIY automation projects. The higher stated wattage than the 3.4W models gives more charging headroom.

Key specs:

• Rated output: 5W at 5V (per listing name)
• Connector: USB-C
• Applications: smart blinds, RV shades, DIY automation

Pros

• Highest stated output among the small panels listed here
• Versatile across blinds, RV shades and DIY projects
• USB-C connector for simple hookup

Cons

• Output is still modest for anything beyond shade charging
• Owners should confirm voltage compatibility with their motor

Bottom line: A sensible choice for a budget-conscious build that needs a little more charging power.

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2PCS Solar Panels 3.4W 6V Charge for Motorized Blinds with USB-C Connector for Lithium Battery Operated Shades

2PCS Solar Panels 3.4W 6V Charge for Motorized Blinds with USB-C Connector for Lithium Battery Operated Shades

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Best for: Multi-window or multi-shade installs

This two-pack suits a home with several motorized shades, where each window needs its own panel. Buying two matched units simplifies planning for a set of similar windows.

Key specs:

• Quantity: two panels per pack
• Rated output per panel: 3.4W at 6V (per listing name)
• Connector: USB-C

Pros

• Two units cover multiple shades in one purchase
• Matched specifications across panels
• Same USB-C connection as the single-panel version

Cons

• Only useful if you actually have more than one shade to power
• Each panel still produces modest output on its own

Bottom line: Choose this for a multi-window project where matching panels keep the setup consistent.

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Buying Guide

Know whether you need a thermal collector or a charging panel

Thermal collectors heat water and are sized by aperture area, often in square feet. Charging panels power small devices and are rated in watts and volts. Confusing the two is the most common mistake in this category. If you need hot water, look at solar thermal collector guides such as Solar Thermal Panel Installation: A Step-by-Step DIY Guide (2026) and 6 Best Solar Thermal Panels for Hot Water in 2026 before buying anything listed here.

Good picks for this: 1pcs Solar Panel 1.3W5.5V, 1PCS Solar Panels 3.4W 6V

Check wattage and voltage against your motor

Match the panel’s stated voltage to your shade motor or battery pack. Output in watts tells you how quickly a panel can replenish charge under good sun. Higher wattage helps in partly cloudy climates, but only if the voltage is compatible. Manufacturers usually publish these figures; confirm them on the listing.

Good picks for this: Solar Panels 5W 5V for Motorized Blinds, 2PCS Solar Panels 3.4W 6V

Measure the window or skylight first

For skylight shades and inclined windows, measure width, height and depth before ordering. Custom cellular shades rely on accurate dimensions, and a solar panel must sit where it receives unobstructed sun during the day.

Good picks for this: ZSTARRFramed Honeycomb Skylight Shades

Think about sun exposure and orientation

A panel facing a shaded wall will underperform regardless of its rating. South-facing exposure in the Northern Hemisphere, or the sunniest available orientation, gives the best results. Plan mounting positions so the panel is not blocked by trees, eaves or neighboring structures during peak hours.

Good picks for this: 1pcs Solar Panel 1.3W5.5V, 1PCS Solar Panels 3.4W 6V

Consider the connector and cable routing

USB-C connectors are common across these listings, which simplifies connecting a panel to a battery or charging port. Check cable length and whether the connector routes cleanly through your window frame or shade housing without pinching.

Good picks for this: Solar Panels 5W 5V for Motorized Blinds, 2PCS Solar Panels 3.4W 6V

Plan for durability and weather exposure

Panels mounted outdoors face UV, temperature swings and moisture. Look for weather-resistant construction and secure mounting hardware. Check manufacturer statements about outdoor rating before installing in exposed locations.

Good picks for this: ZSTARRFramed Honeycomb Skylight Shades, 1PCS Solar Panels 3.4W 6V

Plan multi-unit systems in advance

If you are automating several shades, decide early whether each window gets its own panel or whether you will share charging across shades. Matched panels from the same product line make wiring and maintenance more predictable.

Good picks for this: 2PCS Solar Panels 3.4W 6V, Solar Panels 5W 5V for Motorized Blinds

FAQ

Do velux solar thermal panels heat water?

Most listings found under this keyword are small photovoltaic charging panels for motorized blinds and shades, not thermal collectors. Actual solar thermal water heating requires a collector, circulation loop and storage tank. Check the product type before buying.

What is the difference between a solar thermal panel and a solar charging panel?

A solar thermal panel captures heat to warm water or fluid. A solar charging panel converts sunlight to electricity to charge a battery, usually rated in watts and volts. They serve different purposes and are not interchangeable.

How much sun do small shade panels need?

Most manufacturers recommend direct sun for several hours daily for reliable charging. Panels in shaded or heavily overcast locations may charge slowly. Confirm the recommendation in each product’s documentation.

Can I use these panels to charge a phone or other devices?

The panels are designed to charge motorized shade batteries. Their output is modest, so charging phones or powering appliances is not their intended purpose. Consult the product specifications before connecting other devices.

Do I need a professional to install a window solar panel?

Many shade panels mount with adhesive or simple brackets and need no electrical work. If you plan to wire a panel into a home electrical system or a larger battery bank, consult a licensed electrician.

Should I buy one panel or a two-pack?

Buy one panel for a single shade. Choose a multi-pack if you are automating several windows with similar requirements, since matched units simplify planning.

Conclusion

For most readers searching velux solar thermal panels, the first decision is product type. If you need a thermal collector for hot water, these charging panels are not the right tool, and the related guides linked above will help you compare true collectors. If your goal is automating motorized blinds or skylight shades, the five products here cover the main needs. The 1.3W window panel suits a single blind with modest sun, the 3.4W single panel offers more charging for lithium-battery shades, the skylight shade is the choice for inclined windows, the 5W panel offers the highest output here for budget builds, and the two-pack fits multi-window projects. Confirm voltage, mounting and sun exposure against the manufacturer’s documentation before you buy.

Sources

• Federal guidance on solar energy basics, including how solar technologies convert sunlight into heat and electricity (energy.gov)
• Research data on solar resource and photovoltaic performance under varying conditions (nrel.gov)
• Safety certification standards and how they apply to electrical and solar products (ul.com)

Related reading

• Worcester GreenSkies Solar Thermal Panels: 5 Best Options Compared
• Top 5 Solar Thermal Collector Panel Options with Heavy-Duty Builds (2026)
• 6 Best Solar Thermal Panels for Heating Homes and Pets (2026)
• 6 Best PV Thermal Solar Panels Compared for Home Water Heating (2026)

About Ethan Brooks

Ethan Brooks is part of our editorial team and reviews and edits our solar water heaters guides, checking product details against manufacturer specifications and owner feedback.