To the best of my knowledge I'm the first person to mine with solar energy.
A previous poster said to just get a solar panel with a micro inverter and plug it in to an outlet. In my state and most states in the US that's completely illegal and potentially life threatening. You need to get special permissions and equipment before plugging it into your house electrical circuit. Without getting the appropriate approvals you could be subjecting yourself to criminal charges. Additional, you could be risking setting your house on fire, if you're not aware of how to properly size circuits for back feeding solar energy. So make sure that you're taking the proper precautions and consulting with professionals before you start plugging solar panels into outlets in your home.
With that said, right now solar energy is very cheap compared to other sources. The safest method for powering a miner would be to get a miner that is configured to be powered by DC energy either 12volt, 24volt or 48. Then purchase a quality charge controller configured to put out that voltage that also has set points for minimum maximum battery discharge for shutdown and startup. Add a cheap battery from a local supplier, And purchase a quality solar panel with a 20 year warranty or get a used solar panel from a reputable supplier. This will be the least expensive way to power a miner, the miner would only run when the sun is putting out enough energy to power the miner but you will have paid for the energy to run the miner for as long as the miner continues to work, if you'd like you could expand the system with batteries but that will add extra expense.
https://www.EcologicalSystems.biz is located in NJ has an excellent reputation and has been in business for over 20years. They currently have used solar panels available for 20cents/watt and brand new panels for as low as 45cents/watt.
Shipping costs for solar tend to be a big part of the expense. So often times the price per watt for small orders is less important than the cost of delivery. You might be better off getting solar panels at a higher price per watt from a local company, than having them shipped to you.