Hi Todd,
Ref: Here's a new one I've never seen before... the
system above has 16 identical Kyocera J51 panels... as they are 12 volts each
they need to be in series to get 24 volts out. Generally I connect a bunch of
individually series 24 volt strings into parallel to feed the load... this
installer paralleled 2 sets of 8, 12 volt panels together and then series these
to get 24 volts... probably the same result, but I know there is some reason
this is not done when combining batteries for higher voltage, and I wonder if
the same reasoning holds for PV combinations as well. Anyone got any info
on this wiring style, or pro's or con's for each variation?
The two reasons that come quickly to mind is that each series
string needs fusing, therefore fewer fuses and disconnects are generally needed
if you immediately wire in series. Also, the sooner you increase the voltage the
sooner you decrease line losses and generally less wire size and length is
needed.
Scott Carlson
Carlson Solar
(909) 927-0782
,
TC
--
Todd Cory
KE6SXS
toddcory@jps.net
Bald Mountain
Solar
P.O. Box 689
Mt. Shasta, Ca. 96067
(530) 926-1079
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