The cost is too high. First, it converts light energy into electrical energy.
The price of household solar panels is currently 10 yuan per watt, 2 watts measuring 136*110*3 mm. They have to power the computers. In terms of general power supply
The larger the finished product, the more expensive it is, unless you connect it in series yourself, which will be more inconvenient
This also requires batteries and transformers. That's enough. . .
300 watts
I guess your roof must be paved with this stuff