Thanks for the agreement. When I first read your paragraph, there was a smudge on my screen and I read this line as:
"There is of course where to put the wire " I read as "There is of course where to put the wife.". so true! Bob On Wed, Jul 17, 2019 at 10:09 PM Michael Ross via EV <[email protected]> wrote: > There was a time when solar thermal and its 70% efficiency made sense, > because PV cost too much. But that time has passed. > > I think that PV is now better than solar thermal. There are a lot of hidden > costs and difficulties putting a thermal collector on one's roof. There is > a bunch of piping that not everyone wants to be obvious or cobbled looking. > You have to poke holes into your attic and elsewhere. It needs to be > insulated and to not break in the winter. You have to have pumps and > valves and drains. You need a special water heater, and it needs electric > backup anyway. You have to own ladders and be able to work safely with > them. You have to be more than just a little handy. There are HOA and > building quality requirements for proper design and installation. It takes > up space where PV could go. > > Or you can mount a few relativity inexpensive arrays and wire them up. > There is of course where to put the wire. Much easier to do a neat and tidy > job, no leaks through the roof, no fancy heater with a heat exchanger. > > The business of building and installing solar thermal collectors is just > about done in because of the constantly falling cost of PV. Solar thermal > ends up more complicated, expensive, and has more opportunity for error. > > I thought Robert's solutions were attractive. I provided certified and > custom testing for solar thermal collectors for 5 years. I am handy enough, > but I would go with PV, not thermal. Far too much trouble the thermal > business. > > On Wed, Jul 17, 2019 at 1:51 PM Jan Steinman via EV <[email protected]> > wrote: > > > > From: Robert Bruninga <[email protected]> > > > > > > … using about 4 Solar panels > > > for the bottom coil in a water heater are a good idea. You need hot > > water > > > every day, and so this gives you 100% effectiveness of these 4 or so > > > panels. > > > > Seems like a horribly inefficient way of heating water! > > > > Direct solar hot water is a much better use of resources and solar > energy. > > Someone who's handy can easily cobble one up out of copper tubing, > plywood, > > glass, and some flat-black spray paint. > > > > Jan > > > > _______________________________________________ > > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > > 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/20190717/bc73aa0e/attachment.html > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20190717/cfe6c94f/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
