I have solar on my home. And it makes 70% of the power I consume. But that doesn't include my gas appliances nor my car (I don't have an EV). And I live in Alabama where I get plenty of sunshine.
Is it good for me? Yep. Is it something that can be done everywhere with good results. Nope.
For silicon photovoltaic (PV) cells, the physics boundary is called the Shockley-Queisser Limit: a maximum of about 33% of incoming photons can be converted into electrons.
State-of-the-art commercial PVs achieve just over 26% conversion efficiency—in other words, near the boundary. Just like there is only so much potential energy locked up in the molecules contained in a barrel of oil, there is only so much energy available per square meter of sunlight on a surface area.
While researchers keep unearthing new non-silicon options that offer tantalizing performance improvements, all have similar physics boundaries, and none is remotely close to manufacturability at all — never mind at low costs. There are no 10-fold gains to be had.
https://www.manhattan-institute.org/green-energy-revolution-near-impossible
Mark Mills, Manhattan Institute
And what do you do for power at night and on cloudy days?
How often to you have to clean your colle tors? If you don’t clean them ebmvery month, how much efficiency is lost?