If you get a larger panel over 15 Watts or so, you will probably need a
charge regulator so you won't overcharge your batteries when the sun is
strong for extended periods.
Art
DaveBreski wrote:
Carry the 2 subtract 5 plus 3 - Do I need to figure in the humidity in
St. Louis as well?
Dave - calculating
C27 #5212
Windabout
Cape Cod, MA
http://dpbcc.home.comcast.net
------------------------------------------------------------------------
*From:* [email protected]
[mailto:[EMAIL PROTECTED] *On Behalf Of [EMAIL PROTECTED]
*Sent:* Sunday, August 27, 2006 9:42 PM
*To:* [email protected]
*Subject:* Re: catalina27-talk: Batteries
We use a solar panel to keep the batteries charged. They are
relatively inexpensive, last forever (unlike batteries), no
electrolysis, no cable to attach to the shore, etc.
To estimate the size of solar panel to use, multiply the number of
hours your use the batteries times the current drawn, multiply by two
and divide by the number of sun hours between the times that you use
the batteries. The factor of two is for the solar angle on the panels.
If you have the money, double the estimate.
Bob
