What can I do with free electricity except mining?

The solar panels are installed of 10kw but the usage is always below 5kw in my house and the electricity company refused to buy the electricity from me so what can I do with the rest of the electricity? am thinking to buy somekind of machinery to make something that can be sold out.
Appreciate your ideas.

submitted by /u/LucidDreamer2k
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source https://www.reddit.com/r/beermoney/comments/13lqkmg/what_can_i_do_with_free_electricity_except_mining/