As I've mentioned elsewhere in this thread, utility scale battery storage, or home storage if you prefer (Tesla PowerWall).
> Both are (currently, granted) much more expensive than nuclear if you care about generating large amounts of power.
Both are already cheaper than nuclear without subsidies, to the point where Exelon (who operates the largest US fleet of commercial nuclear generators has to pay consumers to take their power 10-20% of the time due to wind generation).
> They both kill about 5x more people than nuclear (deaths/injuries per tWh), even taking into account nuclear waste disposal.
I concede that utility solar and wind are safer than rooftop solar. I'd argue you can make installing solar on roofs pretty damn safe if you follow OSHA guidelines.
As for cheaper, it's still slightly more (30%) for PV solar than for nuclear (as far as I can tell). That will continue to come down, which is great. The cheapest clean energy is actually geothermal, but there are only so many places where the plate tectonics work with our current drilling technology. Ironically, drilling advancements for fracking and deep wells will open up the field for geothermal in many more places.
As for safety, the 5x number was for plant solar, not rooftop. Production of silicon PV panels is not clean, nor is it safe shipping millions of them around the world. However, the safety is so much higher than coal that I shouldn't really be complaining.
However, since you care about this subject, I feel compelled to point out that:
- Neither produce power all the time (i.e. at night for solar), and can be transiently unreliable (i.e. weather). This is OK if all you care about is moving water around from one large reservoir to another, but less so for anything else.
- Both are (currently, granted) much more expensive than nuclear if you care about generating large amounts of power.
- They both kill about 5x more people than nuclear (deaths/injuries per tWh), even taking into account nuclear waste disposal.
Subsidizing rooftop solar is one of the stupider things we have done as a society. Subsidizing large plants makes a lot more sense, since at least large scale solar plants are somewhat safe.