I can't tell if your being intentionally obtuse here. EVERYTHING costs. Your own system costs alot. You are on the hook for maintenance/repairs/replacement. It sounds wonderful to say something is free but you pretty much gotta be living in a fantasy world to believe it. I'll say it again, You either pay the rates or pay for the equipment. And maintenance. And repairs. 10,15,20 yrs down the line You could come out ahead or break even or lose your rear. That's a gamble you take. Nothing is free.If YOU own the means of production, who you going to pay for it? In fact, our local PUD PAYS YOU if you get a surplus from your system.
For now I'll happily pay my $150-$175 a month electric bill during the winter in an all electric home (minus heat) where my teenage kids leave every dang light on in the house and wife works from home. I got big juicy equipment in the garage that gets used on a regular basis. Someone is here round the clock day in and day out spinning the meter. It's more than acceptable in my view.
I grew up in Wyoming collecting dead wood and occasionally dug up coal for heat. Been there done that, it wasn't fun! I'm still heating with wood all these years later, but do it my way - outdoor unit and half (barely)modern equipment. No more mauls and axes and shovels for this guy.
Oh, and the wood just happens to be a lot more plentiful and easier to get around here, too.