It depends on a lot of factors, like depreciation of the mining hardware. If you're only mining during peak solar hours (the middle of the day), you're gonna get less out of your miners than a rig in kazakhstan that's running them 24/7.

Also, how does the pricing of power work during excess hours? You could set up some sort of script to fetch the rates from your supplier and start/stop mining based on the price. You might need to do some talking with your supplier or local power company to figure this stuff out.

You can also run the numbers to see if it's worth it to GPU or CPU mine another coin, but that probably won't be more profitable.