[Elecraft] What size Solar for 7 Ahr Battery w/K2

Thomas Beltran tbeltran at earthlink.net
Wed Dec 20 09:42:51 EST 2006



That is, is the 15.5W array (1 amp) a much better match to the 7 Ahr battery
then the 20.8W (1.4 amp) array? Or should I go for as much solar amps as I
can afford that will fit within the physical contraints of backpacking and
kayaking?



Paul - I've been using solar power while camping for some time.  The solar
panel ratings are for perfect conditions (which is only a few hours a day at
best).  I use the Connecticut Solar backpacking panels - two 32 Watt panels
and a Morning Star 15 amp controller - very nice equipment, but the panels
are pretty heavy.  With ideal conditions, I get about 5 amps output.
However, typically, the figure is about 2.4 amps.  You might want to factor
that into your calculations.  I'm also curious about the experiences of
other people - perhaps I am doing something wrong.  Tom W6EIJ






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