[NoCanDo]

Gravity batteries. Get a million gallon Tank on 10-20m stilts, pump water into it with ONLY waste electricity.

Let water flow out of it and power a turbine during times where electricity is needed.

[ukoki]

But then OP still has too much electricity — s/he just has too much electricity at different times!

[LinuxBender]

Seems like a good opportunity to donate some power to the neighbors.