"I'm sure saying this will probably prove unpopular."
Yes... Not because the goal is bad, but because you clearly have no idea of the numbers involved.
Covering a factory and ancillary sheds in PV would do nothing significant to the external energy requirements.
Yes, a modest home can become (almost) self sufficient after the installation of PV/Geothermal, but the energy cost to produce them, ship them to the home and install them is considerable.
The amount of energy used by industrial processes is many orders of magnitude higher than a residential property and makes up a significant proportion of the global energy usage.
Look at construction in the UK alone... More than 400 million tonnes of materials get delivered to site each year. Consider what that costs in terms of energy consumption!
The bottom line is that PV is a drop in the ocean and always will be unless we give up our current lifestyle and regress to the middle ages. Since it's unlikely that the vast majority of the population would ever accept that as an answer, it's time to start investing more in Nuclear.