> The real problem is "not enough", which is the thing that doesn't get really bad until you're trying to run the majority of the grid on it. If it's only half then the other half is reliable power sources, some of those are still peaker plants and then you have the option to run them during the day on the days when it's cloudy, renewable generation is sometimes low but it's hardly ever actually zero, and by that point you're at something like 80% coverage on the lowest generation days and can get the remaining 20% through variable pricing.

You're not thinking like a grid operator. They need to pay to keep those peaker plants operational, even if they're not being used. The more peaker plants that have to be kept offline for more of the time, the less attractive it is to buy the power from the solar or wind plants.

Until solar and wind can generate reliable amounts of power, day-in and day-out, 365 days out of the year, you will always need those peaker plants to take up the slack. But those renewable sources will never be able to do that. The best they can hope for is to overgenerate during the times that they are capable of doing so, and storing the excess somehow in another medium. That could be batteries, flywheels, pumped hydro, or whatever. But they need that buffer if they are going to be a larger part of the grid.

> A solar panel generates around two thirds as much in New York (on the border with Canada) as in Arizona (on the border with Mexico). That isn't totally negligible but it's not so large as to make it unworkable.

It might not be enough to keep homeowners from installing solar panels in those kinds of environments, but it's definitely enough to keep large-scale power generation facilities from building there.

> And there are still plenty of not just homes but also commercial buildings that don't have solar on their roof. Give every Walmart and Home Depot an incentive to install a support scaffold full of panels over every parking lot. Why pay for a lot of land when we haven't even taken the easy wins yet?

I agree that parking lots and roofs of buildings are targets that look easy. But the incentives just aren't there. It's still just way too expensive, for not nearly enough ROI to make it happen. And I just don't see incentives of that scale coming, not even with the New Democrats.

In theory, I don't disagree with you with regards to where we should be going and what we should be doing.

But in practice, there is a huge difference between theory and practice.

> They need to pay to keep those peaker plants operational, even if they're not being used.

But they are being used, every night. And then you can also use them during the day on the minority of days when it's cloudy.

> It might not be enough to keep homeowners from installing solar panels in those kinds of environments, but it's definitely enough to keep large-scale power generation facilities from building there.

Nope:

https://cleanview.co/power-projects/operating/solar-farms/us

You could easily confuse that with a population density map of the US. The main tell is that the dots are on the outskirts of the major cities rather than in them.

> It's still just way too expensive, for not nearly enough ROI to make it happen.

It kind of is happening. Nearly 100% of net new generation capacity in the US is renewables, with some new natural gas barely offsetting the gradual death of coal to net to zero.

The problem is it's not happening fast enough.