Is there a low power usage (like 20 kWh a day or throttleable power, or mining that can be turned on and off), not too hot, not too loud, not too expensive hardware system to slowly mine Bitcoin?
I purchased a new house with an overkill solar system. I’m also on a grandfathered net metering electric company plan where they store any power as credit I can use for up to a year at no cost.
I generate an extra 600kwh more power each month than I use. Right now I have a credit of 7,200kwh that I can use and I get another 600kwh each month (even with charging my ev). It’s use it or lose it.

Is there a slow mining, low power usage or possible one that can be turned on or off, with a timer, and not loud system, that’s not crazy expensive to slowly mine Bitcoin? I live in a very expensive power area (Hawaii 40 cents per kw) and I just let this power go to the power company for free. Even if Bitcoin mining slowly only effectively makes me 10 cents per kW then it’s still $60 a month. 
A serious thank you in advance of anyone can give guidance and opinions on this.
Aloha.