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re: hooked on solar - more power!!!
19 jul 2002
tony clark wrote:
>i am the proud owner of a 15 (25v) x 100w (peak) panels, grid
>tied, solar pv power station.
nice :-)
>i have installed a sprinkler system which enhances summer output
>by about 10% by cooling the panels. any water running from the
>panels is directed to the swimming pool to replace evaporated water.
interesting... using a dc pump and pv thermostat? what's the best
temperature setting? a 12v 1a attwood bilge pump can move 850 gph
with 3.3' of head, about 27k btu/h-ft^2, if the water evaporates,
100x more than the solar heat input.
>the panels are on an azimuth adjustable frame, with panels facing
>the sun at about 1pm. (i hope this is not confusing :<)).
why azimuth vs elevation? do you spend all day up there adjusting them?
>the panels are mounted in two rows on my garage roof - occupying
>about half of the nmorth facing roof area.
...nmorth seems like a good direction where you live.
>what would you suggest to increase the output of the system
>without additional panel purchases - 6 x 12v panels per purchase.
some sort of mirrors...
>(system is 75 v nominal, with mppt tracking enabled on the
>invertor).
good... what kind of inverter?
>is reflected illumination usable in this configuration?
sure. even diffuse reflection, from a white surface.
>how would this be configured, as the panels are only-just, not
>shading the back row in mid winter.
can you move one row a little further away from the other and maybe
tilt them up more and add a flattish white patio roof to the north?
the roof might be a silvery tarp. that might increase your wintertime
output 30%...
>i would prefer something which did not require climbing onto the roof
>more that the 6 times per year that is needed to maximise seasonal
>solar output by frame adjustments.
sure...
nick
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