Hybrid Car – More Fun with Less Gas

Is any of this even cost effective yet? - Page 40

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Posted by x on December 19, 2010, 3:55 pm

Please explain the connection between a straight cost comparison and
"environmentalist lunacy" and perhaps we can help.

You want it to pay the first month?  That's just silly.

Then you haven't bothered to do even a little shopping.


Posted by Morris Dovey on December 19, 2010, 10:32 pm
On 12/18/2010 1:06 PM, Jane_Galt wrote:

Hmm - whether you realized it or not, your question is ambiguous.

Assuming that you have no shortage of sunshine:

Photovoltaic (PV) systems can be cost-effective if you're off-grid and
lack other means of producing electricity - but that doesn't mean
they're inexpensive, just that they may be less expensive than other
power sources.

Passive solar air-heating panels are, or should be, better than 85%
efficient (compared to the less than 10% efficiency of PV panels) and
should be cost-efficient regardless of whether you're on the grid or not.

Solar DHW systems may be cost-efficient but will generally require an
active control system and availability of electrical power for the
control system and circulator pump.

Besides for this group, news:alt.solar.pv is usually a good place to
find people who have specific expertise in PV systems - and
news.alt.solar.thermal is a good place to find expertise in thermal systems.

It's usually not difficult to find a bad price. There are bargains to be
found, but you'll need persistence and determination to find them. If
you're willing to do a bit of reading and aren't afraid to DIY, you can
buy relatively inexpensive PV cells on eBay and build your own panels.
I've seen a number of credible how-to web pages and the panels don't
look very difficult to build if you have (or can take the time to
acquire) basic woodworking/metalworking and soldering skills.

I can't resist pointing out that Rand's stated concept of a truly
virtuous person was, in every case, someone who went all-out to learn
and to acquire skills, and then apply both to the creation of new wealth. :)

Morris Dovey

Posted by Another Dave on December 20, 2010, 2:33 pm
 On 19/12/2010 22:32, Morris Dovey wrote:

That should be:


Another Dave

Posted by Morris Dovey on December 20, 2010, 4:05 pm
 On 12/20/2010 8:33 AM, Another Dave wrote:

Exactly so - thanks!

Morris Dovey

(warning: political content)

Posted by bw on December 19, 2010, 11:15 pm

Solar photovoltaic panels have a niche, ie where there is no grid available.

Solar photovoltaic panels will never replace the grid. It's a fact based on
thermodynamic reality.

Find some old copies of Home Power Magazine. Each one will have a couple
stories about practical off-grid power systems.

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