[Elecraft] re: solar power

Fri Mar 21 00:55:01 2003

Martin,

Forgive me if this sounds too tutorial........

At times, the charge current into a battery can be quite high. When 
this happens, there is power dissipated as heat from the regulating 
components. There is always more power going into the charger 
than coming out. P=EI, where P is expended as work and heat. We 
like to keep the heat part down to keep the efficiency up. But since 
we don't live in a perfect universe, some of it is wasted.

Not poor design, physical reality.

Make sense? (With my luck, you have a PhD in electronics or 
Physics........)

Chuck

Note Martin AC6RM's stunning brilliance and Chuck's apt reply (gack!)

Subject:        	Re: [Elecraft] re: solar power
From:           	"Martin AC6RM" <[email protected]>
To:             	<[email protected]>
Copies to:      	<[email protected]>, <[email protected]>
Send reply to:  	[email protected]
Date sent:      	Thu, 20 Mar 2003 21:40:45 -0800 (PST)

> What struck me as odd on that site was this page:
> 
> http://www.ctsolar.com/ChargeControllerKit.htm
> 
> Look at the heat sink on this controller!  I really don't know much about
> this stuff, but it seems that we gather the energy from the sun carefully
> and at considerable one-time expense, and then we dissipate a bunch of it
> as HEAT!  That can't be right.  I'm obviously missing something.
> 
> 73, Martin AC6RM
> 
> 
> > http://www.ctsolar.com/ExpeditionFoldingPanels.htm
> >
> > Larry AE6CP
> > _______________________________________________
> > Elecraft mailing list: [email protected]
> > You must be a list member to post to the list.
> > Postings must be plain text (no HTML or attachments).
> > See: http://mailman.qth.net/mailman/listinfo/elecraft
> > Elecraft Web Page: http://www.elecraft.com
> 
> 
> 
> _______________________________________________
> Elecraft mailing list: [email protected]
> You must be a list member to post to the list. 
> Postings must be plain text (no HTML or attachments). 
> See: http://mailman.qth.net/mailman/listinfo/elecraft
> Elecraft Web Page: http://www.elecraft.com