Site evaluation just got easier.
The new SunEye 210.
One-handed operation makes your shade
measurements a snap. Preview mode shows the
sun path overlay adjusted to the device’s orientation.
Pitch and azimuth measurements are built-in.
Watch an introductory video
Energy continued from page 18
A national RPS would be a good complement
to climate legislation. It should include a solar set-aside, including support for solar water heating. The
target should be 50 percent renewable electricity
Renewable energy incentive programs should
be various and flexible. For instance, feed-in tariffs
should be market-based to avoid booking out too
quickly. Property-Assessed Clean Energy (PACE)
and revolving loan programs have proven successful and should be broadly encouraged. Wherever
possible, utility company rate structures should be
revised to encourage energy efficiency.
Finally, ASES needs to provide more help to its
chapters in support of their state and local policy
work and in advocating to their congressional representatives. — Seth MaSia
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Copyright © 2010 by the American Solar Energy Society Inc. All rights reserved.
Solar Craft Sets Sail for Venus
The Japanese Ikaros spacecraft, launched May 21 from Tanegashima Space Center, was set to
unfurl a solar sail in June and set off for Venus. The
square polymer sail, 46 feet ( 14 m) on a side, is spread
through centrifugal force — it will rotate at 20 rpm —
and will propel the craft by the pressure of the solar
wind, a continual flux of photons from the sun. The
plan is to pass Venus in December and then ride the
wind for at least another year, past and beyond the
sun. The craft’s onboard systems, instruments and
radios are powered by lightweight amorphous-silicon
panels incorporated into the sail. The panels were
custom-made by PowerFilm ( powerfilmsolar.com), in
Ames, Iowa. ST