It is an inspired and compulsive goal to be off grid. He is not accounting for labor and the enormous complication to his home. He is not accounting for the far greater value of his time. What he is doing to his house will never be appreciated when he tries to sell it and move, so he is anchored to his home. Good or bad? I can't say. I put in 5.6kW of PV that will out live me by decades, so we all have a personal choices that don't make sense to many other people.
While solar thermal (he never addressed the actual collector system or accounted for ist cost) is 70% efficient, it is lower quality energy (from an entropic POV) than solar PV and harder to actually apply in the home. Pumps, piping, wiring, mixing valves. Is he on a municipal water supply, or a self powered well system? Anyway, solar thermal is very troublesome to build and maintain versus a grid tied PV system. You could buy PV and use resistance heaters and it might be a good trade off compared to thermal, provided you can actually site the PV well. This is why the solar thermal business is all but dead these days. You can DIY it, but that is about the only way. He is paying $10/kwh (if you accept his very hazy estimates for a number of things) where he can probably buy power for $0.20 / kwh. It is hard to see what the money side of this really looks like. If he actually has a grid, then this is extravagant. On Fri, Jan 24, 2020 at 2:58 AM Lawrence Rhodes via EV <[email protected]> wrote: > Very interesting project with the math explained. Lawrence Rhodes > https://www.youtube.com/watch?v=ryJmtItfaXQ > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20200124/9e210451/attachment.html > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/index.html > INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- Michael E. Ross (919) 585-6737 Land (919) 901-2805 Cell and Text (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Tablet, Google Phone and Text -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20200124/b30e5506/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
