In the real world you cannot expect to need less than around 5 square meters for 1kW of peak power (using the most efficient panels), the standard "rule of the

In the real world you cannot expect to need less than around 5 square meters for 1kW of peak power (using the most efficient panels), the standard "rule of the thumb" being 7 sq meters per 1 kW, some lower efficiency panels (not used anymore) will stretch that up to nearly 9 square meters per 1kW. This puts the efficiency in a range between 1/9 and 1/5, i.e. between 11 and 20%. So if this new panel has a 1/10-1/8 of the best above, it plainly means that you will need in your typical single home installation more space than your roof has. Let's take a 6 kW installation, with best current panels it will be 30 square meters or however at the most 45, with these printed thingies more like 240-300 sqm or more. And 2-3 years of expected life! Maybe the principle is fine but it must be modified/bettered to raise the efficiency and to increase the durability.