[Milsurplus] solar panels
Gene Smar
ersmar at verizon.net
Sun Oct 3 08:20:15 EDT 2010
Tony:
Whatever solar panel you decide on, don't forget to buy a charge
controller to go with it. Solar panel DC output is very erratic, depending
on sunshine (a.k.a insolation) and the output voltage can climb to somewhere
around 140-150% of nominal batt terminal voltage. E.g., a "12 VDC" solar
panel could actually produce as much as 17 or so volts in bright sunshine.
You'll need to have the controller between the panels and batts to maintain
the proper charging voltage being fed to your batts.
The controller will also shunt any excess energy when your batts are
fully charged (their terminal voltage is at 28-29 VDC) so you don't
overcharge the batts. (That's one problem with solar energy - you can't
afford a large enough battery plant to hold all the energy that can be
produced on a really sunny day. This excess energy only raises the batt
voltage, possibly damaging the cells.)
73 de
Gene Smar AD3F
----- Original Message -----
From: "Tony Snider" <trsnider at cox.net>
To: <armyradios at yahoogroups.com>
Cc: <milsurplus at mailman.qth.net>
Sent: Sunday, October 03, 2010 1:23 AM
Subject: [Milsurplus] solar panels
> Hello,
> I have a S-280 comm shelter I have mounted green radios in and I want use
> a solar charger, does anyone have any panels for sale or a good source?? I
> am looking for 24VDC to charge lead acid batteries?
> new to solar systems so any help appreciated on battery types, regulators,
> and panels
>
> THANKS MUCH
> Tony
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