One of the interesting developments with expanding renewable energy systems is that they're creating excess energy at certain times of the day/year. For example in the spring in California when it's sunny but not very hot, these systems are creating excess generation meaning that business opportunities are opening up to be a consumer of energy.
Some of the ideas are just as Frequitude mentions, use that energy to produce hydrogen or use it to desalinate water. The capacity of energy needed to be consumed at times are on the order of 1 GW of power. Hydrogen is basically a battery. The one thing holding it back is a distribution system but there are lots of benefits to it when compared to batteries.
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