that would be pretty solid 1:5 investment!
So, yes, it is safer to just buy Bitcoins, right now with are 0.01 USD over the maximum historical of about 3 months ago. The volume looks high and there are more bids than asks.
We might rally to 1.5 USD or go down to 0.95 USD. take your pick.
Well I can tell you that solar power is not cheap, when equipment amortisation is properly accounted for, why else would it need subsidies to compete with grid power (coal, gas, oil, nukes)? Grid power will be cheaper than solar in most places, unless you put a lot of personal effort into the installation and build but your own time is money also ...