This is interesting-Go Elon---------------

well I have a solar system on my workshop roof, its a big system 42 panels, and a big invertor....I was lucky with a govt rebate of 50%...it cost around 14k to me,,,its been up nearly 3 years..its basically paid for itself..it generarates roughly 8000 watts on a good day...and I use most of my power during the day so its great for me...basically I save more than 50/60% per month , I feed back into the grid what I don't use and get paid for that...