Thin-film solar panels are exactly what they sound like — much thinner versions of the solar panels you're familiar with. What makes them different is not only how thin they are, it's how their. You'll pay around £1.04 per watt for thin-film solar panels, or roughly £6,240 for a 6 kW system. That's cheaper than the cost of a 4 kW solar panel system, which will typically set you back £6,500. The problem is that thin-film solar. Solar panels can also increase the value of your property since more and more people want homes with solar panels. Our National Home Energy Surveyfound that 69% of Brits would buy property with solar panels, up from 65% last. Your home is probably suitable for thin-film solar panels, but their lower efficiency means a lot of properties won't be able to generate enough electricity to replace or significantly reduce grid. You can install thin-film solar panels in much the same way as an ordinary solar array. The major difference is you can install them on more surfaces, such as on caravans and boats. Also, because they're so light, you don't need.