I think you are not being specific enough to make sense in this assertion. It is not your fault, I think this report is specifically misleading.

The Pacific Northwest gets 30% of its power from hydroelectric, so yes it can. California is headed toward a zero-carbon future, again by the mixed use of hydroelectric, solar and wind. So yes, the Western states can be net-zero in the near future. But other parts of the country, and specific sectors like transportation will not be able to abandon fossil fuels entirely.

These kinds of studies are disingenuous from a climate change point of view because they look only at the U.S. . China which makes almost all of our solar panels is using about 80% coal. Their industrial sector uses about 40% coal. We have just outsourced our carbon emissions for manufacturing renewables to China. So the embodied carbon of solar panels and battery manufacture may not be worth it from a climate change point of view.

You always have to look at the agenda behind these reports. I think the agenda for this specific report is the government is looking at the feasibility of creating a nation wide electrical grid for solar and wind. The agenda is to push for this grid. Studies for this were in the Build Back Better bill I believe. The idea is that a new electrical grid would support lots of 'green jobs'.

So this report works from a U.S. energy policy point of view, but not so much from a climate change point of view.