Need nukes to cover the base load and some combination of other power sources along with battery storage to cover the peaks and troughs. Just need someone to break through the gridlock of bureaucratic red tape and legal liabilities holding it all back. Build 400 new nuclear power plants and all our energy needs are covered for a century.
The only thing keeping me from being 100% off the grid is long term storage. That's largely in the winter when we can go a couple of weeks of rain -- no sunshine -- no new solar power. IMHO, a home electrolyzer unit can be powered during the spring and fall when we use little power (because we don't run the A/C or heat much) with the excess solar power, that generates hydrogen gas that can be stored in a tank. Later when I need power because my batteries are drained (say only 20% full) I can pull from the hydrogen (powering a fuel cell) to power the house and bring my batteries back up to a comfortable level (say 30% full). An Australian company has made a hydrogen electrolyzer fuel cell for homes and it's pricey. But if it's like solar and batteries and everything else used to be, soon the price will come down and I'll be off the grid.