I use solarpower to break my peak KW during daytime. My energy costs have been lowered by 25-30%.
My few tips to better ROI your solar miner (I got them from someone who is in that business):
- Dont use any batteries (saves your project 1000 bucks) they are dead after 1-3 years
- Try to get used solar panels which are above the promised 10% power degradation within 10 years (not older than 2-4 years. Because the first owner gets new panels for free - a bunch of those secondhands are hard to get but very cheap 75% off) saves you a lot of money also
- Get a better inverter (500 and above -> more money but less trouble)
A ROI is possible after 2-4 years -even without mining.
