If you want a concern to hold, it's that this will probably increase pioneer grass spreading during the rainy season and then then the panels will all get melted in a wildfire. You don't need to plant anything to pollinator-friendly stuff on your land in California. It shows up with a vengeance.
Also, if not controlled, Avena grass (the invasive species that turns the hills yellow during the summer) takes over, killing off anything that would support pollinators during the summer and fall.
It also currently, but unsustainably, produces a large fraction of all food on earth.
Here’s an article from 2012 with some anecdotes if numbers aren’t your thing: https://www.nytimes.com/2012/10/14/magazine/californias-cent...
Here is a table of crops: https://republicans-naturalresources.house.gov/newsroom/docu...
(it doesn’t seem to include exports, so the numbers are low-balled)
It is clearly being over-farmed, but the solution to that is crop rotation and letting the fields periodically go fallow.
Blanketing it with solar panels is likely irreversible.
I can't help but feel like it's a subtle contradiction to propose that without constant watering the soil in California will crack up and vanish and that's not going to happen with crop rotation but will happen with crop rotation (as if many farms in California aren't already forced to do this because of the nature of our groundwater).
Are you also opposed to orchards? They're full of solar panels that make fruit rather than electricity.
Increases efficiency, prevents undesired pollinators taking control of neighboring paddocks, uses an order of magnitude less water than actual crop irrigation.
We're talking like a couple minimum wage employees with leaf blowers and ladders. Sure it doesn't cost nothing but in the context of a commercial operation it's not thaaaat expensive.
I suspect they haven’t thought about what this will do to the topsoil.
Even ignoring the ecological catastrophe of destroying the topsoil, getting the dust it produces off those panels during the summer is going to be expensive.
Planting native pollinator friendly stuff under the solar panels would address my concerns though.