Adds conductive floor tiles that transmit power to adjacent tiles (including diagonals) and any structure on top of them, just place a power source or electric pole on top and enjoy the extra space!
you can build Solar plants, why solar tiles ?
If you build everything on top of them how will they take the sun light to give electricity, solar tiles has no point exept if you want to build them and dont build nothing on top of them.
As Co5tel said, you can easily build solar plant/panels on top, and personally, the idea of a solar plant tile could actually be a bad idea... It brings back the main optimisation problem of Powered Floor Extended: 1-to-1 entity overlap, meaning, if you fill a chunk with this solar tile, you would have 1024 entities!
This mods covers this problem with a different aproach. Making the 1024 problem look like a bad nightmare, jajaja.