I considered this a good investment to any miners out there, I currently pay 14p kwh here in the UK, so in the summer months this really helps as the system produces 2 - 3.5 KW of free electricity on sunny day which has allowed me to grow my mining farm without the wife killing me over the electricity bill. (Around £250 a month).
Everything i mine i keep, may of exchange for other coins but not sold anything. I pay the electric bill out of my wages each month.
I went for 4KW Solar System with company called Project Solar in April 2019 to offset some of electric costs in my mining operation. This is made up of 12x 330W Evolution Ultramax PLM-330MB066/D. Only expected to drop by 92% efficiency in first 12 years. This included an additional piece of equipment called a Volt Doctor, this reduce the Voltage in my house from 241V down to 220V which has optimises the amount of power that electric appliances uses.
This includes 48 hour repair response with dedicated customer care, an damage to roof over next 10 years is also covered by the Solar company. If a solar panel drop below its efficiency rating, engineer will attend and replace the effected panel free of charge, this is all monitored by another piece of equipment that linked to my internet connection.
My Investment to install the Solar System was £10,600 for 25 years of generating renewable energy it was no brainer for me, sure on rainy days and only generating 500 - 1KW it hurts. Here in the UK there were incentives to go Green, the Government funds Solor producers in payments over time to reduce the cost of the solar system. This includes a feed back into the grid scheme which takes into consideration how much you generate from another meter, halfs the generation value and pays 5p per kwh which helps to recoup so of the costs of the system. This is good considering that they are considering only using half the energy that i produce, but like all miners nothing goes back into the grid at my house as i consume 3.5 - 4.0kw all the time.