> Many sites offer panel tilting formulae.
> Moving twice a year can be useful.
> More often has diminishing gains.

The trials I've done with panels show that it's worth tracking. Whether
you would depends on your latitude and if you feel the effort required
to build a tracking mechanism is necessary to chase the extra power

NZ is at a fairly low latitude and the difference between mid-day sun
height during the year is significant

Mid-summer solar noon is 76.6 degrees above the horizon, mid-winter
solar noon is 29.7, almost 46.9 degrees difference

Today, late autumn, it's 39.2 degrees

http://www.timeanddate.com/worldclock/astronomy.html?n=3D22&month=3D4&year=
=3D2011&obj=3Dsun&afl=3D-1&day=3D1

Compare Quito (equator) and Nome (way north)


--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.