What is ETFE

ETFE (Ethylene-Tetra-Fluoro-Ethylene) is a high-strength fluorine polymer that is corrosion and stain resistant, non-stick self cleaning, and retains its clarity (and therefore light transmittance) ensuring long service life for solar panels.

It will not discolour or degrade from exposure to environmental pollution, UV light, harsh chemicals or extreme temperature variations.  The surface is textured for extra robustness.

Benefits of semi-flexible Monocrystalline PV Panels:

  • They are able to convert the highest amount of solar energy into electricity of any type of flat solar panel making them the most efficient and most dependable way to produce electricity from the sun;
  • They produce more electricity per square metre of other panels and consequently are the best choice for settings where space is limited;
  • They are thin: At only 3.0mm thick they are the perfect option for caravans particularly pop-tops that need to fit into a garage;
  • They are lightweight: (e.g. 2.4 kg for a 135 W panel);
  • Being semi-flexible (up to 30 degrees) they can conform to the roof of your caravan, motorhome or boat deck;
  • They are easily installed 
  • They do not have the toxic heavy metal Cadmium (Cd) and are not hazardous to the environment. 

Premium flexible solar panel with slim junction box
Premium flexible solar panel with square junction box



​​​Options for installation

  • Double sided high bond tape

  • Adhesive Sealant such as Fix15 which is marine grade, UV resistant and non-yellowing


  • Eyelets can be added in our workshop

  • Zips can be sewn directly onto the panel by your bimini / sail canvas maker (we can provide a sample piece of panel to practice on)

premium Flexible solar panel
flexible solar panel installation usig double sided high bond tape

Slim junction  box on top

We are again at the forefront of flexible solar panel technology.

In line with our continued commitment to quality, RADpower (Solar 4 RVs own branded flexible panels) with A grade SunPower cells now have a top layer of ETFE.  

There are multiple advantages to utilising this superior technology on flexible solar panels for caravans, marine and industrial applications. 

These panels also have a textured surface for extra robustness.

Questions to ask before you buy flexible solar panels
RADpower by Solar 4 RVs

​                                                                                     ​Benefits of ETFE

Stain resistance and easy to clean:
Sunlight reaching the solar cells is obviously a key component of efficiency.  Due to the non-adhesive surface properties of the ETFE, these panels are less likely to hold pollutants which can block the sun as deposits of dirt, dust, and debris do not stick and are washed away by the rain resulting in a “self-cleaning” effect.

The film is durable, highly transparent and very lightweight with a thickness of only 0.5 millimeter.  The film will not discolour or structurally weaken over time.

ETFE is robust and unlikely to degrade from exposure to environmental pollution, UV light, harsh chemicals or extreme temperature variations.

2 years 

Non-slip textured coating

These panels will also have a non-slip textured surface ideal for the marine environment.  The textured surface offers an extra layer of protection and robustness.  

​​​Why buy from Solar 4 RVs

These flexible solar panels carry our brand name and logo.  Our reputation as a supplier of premium, superior products is important to us so we are very focused on quality. 

PLEASE NOTE: Flexible solar panels are not suitable for glueing to polycarbonate or polyethylene foam.  

Dimensions, Specifictions and pricing of our ETFE flexible solar panels:​

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providing engineered solutions


Our Monocrystalline Photo Voltaic (PV) Panels with ETFE are:

  • High efficiency with certified A Grade SunPower cells

  • ​Lightweight; 

  • Semi-flexible;

  • Thin;

  • ​Easy to handle - no glass or frames;
  • Easily installed using adhesive sealant or high bond double sided tape - no mounting brackets;

​​​Other interesting uses for ETFE

Popular in architecture, the Beijing National Aquatics Centre (the Water Cube of the 2008 Olympics) is the world's largest structure made of ETFE film. 

ETFE is also commonly used in the nuclear, aviation and aerospace industries because of its mechanical toughness. In addition, ETFE exhibits a high-energy radiation resistance and can withstand high temperatures for a long period of time.  

​​​​SunPower E20® series cells were developed in the US and capture significantly more sunlight and conduct more electrical current than other solar cells. Solar panels containing SunPower E20® series cells are the highest efficiency panel available on the market today, providing more power in the same amount of space.  Efficiency refers to the percentage of sunlight hitting the panel that gets converted into electricity therefore a higher panel efficiency means that the panel can generate more power.

These genuine certified A grade cells are used by our manufacturer in China where these panels are made to our specifications and strict quality control requirements.    Read more by clicking here

Solar 4 RVs PREMIUM Flexible Solar Panels with ETFE 

Square junction  box on top

Specifications and dimensions for lightweight flexible solar panels
best premium flexible solar panel in Australia with ETFE top layer


  • We use the same manufacturer in China and have a shared understanding of Australian quality expectations and customer needs.  They manufacture to our specifications for each order we place. They have ISO9001 quality management system accreditation and our panels carry the CE mark. 
  • The panels are tested during production and each panel carries our logo, contact details and serial number on top
  • Our support and warranty service is unmatched.

We receive many ‘proposals’ from manufacturers that offer ‘cheap’ panels but we do not wish to buy other ‘grades’ of panels from standard manufacturing runs that may have overlapping, damaged or inferior cells, sharp edges, unsealed junction boxes or silicone partially blocking cells near the junction box.