On Sep 9, 8:41*am, Gene wrote:
On Wed, 09 Sep 2009 08:12:56 -0400, Wayne.B penned the following well
considered thoughts to the readers of rec.boats:

|You have to calculate how many amp-hours need to be
|replaced, and how much daylight time you have available.

Voltage might also be an issue. A lot of the larger trolling motors
are either 24V or 36V and that might drive the price of the solar
panels, plus any necessary isolation hardware, through the roof....

Say, $3000 for 2 panels delivering 270W (@ 12V) times 2. That should
yield about 45 Amps.... that might even be enough to just run the
motor! However, that doesn't account for any power loss or control and
isolation hardware.http://tinyurl.com/ml6h6v

Things would be easier for a 12V application, but I suspect that the
Amps required would be proportionally higher.

--
Agent 5.00 Build 1171

Grady-White Gulfstream, out of Oak Island, NC.

Homepagehttp://pamandgene.tranquilrefuge.net/* * * * * * * * * * * * * * * * * * * * *

I use a 15 watt solar panel to recharge a deep cycle battery on my
sailboat and to keep it topped up between uses. This works well for
charging between uses but when running the boat, the diesel does most
of the charging if the battery is heavily used.