Nah... there are batteries that exist to meet massive demand. It's called  uranium-235 :D,(reply>), Nuclear power can be very responsive, depending on how you design the reactor. The plants in nuclear submarines and aircraft carriers can ramp up and down quickly, for example. You're right that most of the ones currently built for power generation can't do it very well though.<br><br>The French have a shedload of nuclear power and load-follow with it pretty effectively, without using highly enriched uranium like the military reactors, so it can be done in civilian applications. Most existing reactors don't even bother trying because the fuel costs are so low compared to the capital and operating costs that you can practically give the power away and it still makes more economic sense than having your multi-billion-dollar investment sitting idle.,(reply>), Yes, but it's still a store of energy from gravitational collapse.,(reply>), nuclear power is constant, it can't be added or removed at the drop of a hat.