That's been my question for quite a while.
I'd also like to see a compost generator produce stored energy. Sustained temps of 160°-180° F has to be worth something.
Not practically. The amount of power -- volts times amperes -- is enormous, beyond any technology we have to capture and store electricity. We can play with a tiny fraction of it (like Franklin did), but not with the amount of a real lightning bolt.
It's sort of like asking, "I don't want to waste my time eating regular-sized meals the rest of my life. Is there a way that I can just get all the food I'll eat for the next 30 years and eat it all at once?"
NO, your stomach can't hold it.