Just did a quick calculation on this guys claim a 100 x 100 mile of modern PV will power the US with some to spare. To understand the size of that, it is 26,000 square kilometers. 10x the size of the ACT. The number of panels required for that is mind boggling....not to mention the effect on the ecosystem under all those panels - which would have to be complete coverage, no gaps...
So using first principles if you could convert the suns maximum energy irradiance on that area (1kw/m2 with sun directly overhead, clear skies) for 6 hours a day every day for a year, it would equal the total current power generation of the US at 4500 billion kwh.
Thats 100% conversion effeciency of peak sun energy... I don't know what Tesla are bringing out but If its a 100% efficient panel (or any other type of energy transfer) they are about to rule the world. Even then you have to then store most of the energy generated for 18 hours a day....
And he accuses Moore of cherry picking/exaggerating.
To break that down into reality, current best PV efficiency is 23%, so that instantly increases the area needed by 430%. Now we have 112,000sqkm. Plus at best you might get a 50% panel to area efficiency. So thats 224,000sqkm.
Now we have a solar farm the size of Arizona or Nevada states, and we are still assuming max sun energy. No allowance for the latitude or winter months or storage inefficiencies. And we have to manufacture and replace these things every 20 years and dispose of the waste.
These are not low impact solutions. The energy is renewable, the power capture systems are not.