Small Power Systems has
built trackers for over 25 years.
This is a
temporary web site for Tracstar solar trackers made by Small Power Systems with
up to date material. You can reach our
old web site at Small
introduction to solar trackers download the two-page .pdf file: Should You Install a
step-by-step instructions on how to determine exactly how a tracker (and PV in
general) will work at your location click on PVWatts. This exercise will take about 10-20 minutes and includes a
questionnaire to fill out for additional information. PVWatts
There are many
types or geometries of trackers for example; azimuth, alt-azimuth, equatorial,
and linear. For a simple graphical
representation of the main types and their motion click Tracker
is a list in ascending order according to size of the trackers made by
Tracstar. Generally our trackers cost
$0.75 to $1.25 per nameplate watt of installed modules. Linear trackers tend to be little cheaper
than pedestal mount trackers. Some
structural materials must be purchased locally to save on shipping.
- Solar oven tracker This is a simple
self-powered platform for solar ovens that is an azimuth type tracker.
- Self Powered tracker These are simple,
azimuth trackers ranging in size up to about 80 sq. ft. of solar module
that have no electronics and do not require a battery. They are electro-mechanical and take
about 10 minutes to orient to the sun in the morning and then follow the
sun accurately throughout the day. A very good tracker for small systems and especially pumping
applications. We will make a
linear version of these as soon as we have a request for one.
- Azimuth trackers with electronic controls These are traditional azimuth trackers of any size that follow the sun
accurately all day and return to face the east ready for sunrise the next
day. Azimuth tracking is a very
effective single-axis tracker especially at higher latitudes that requires
no adjustment after installation.
- Dual-axis trackers Our larger azimuth
trackers have the option of being dual-axis. Normally we do not recommend this option, as it is not cost
effective except on our largest model, which can handle up to about 500
sq. ft. of array. We are developing
a linear dual-axis tracker.
- Precision dual-axis -- We make a controller
(the electronics that control the tracker) that is accurate to .05
degrees. It is one of the best
controllers available. When installed on a dual-axis tracker the tracker
is suitable for use with concentrating systems. The smallest dual-axis we make will carry about 75 sq. ft.
of solar collector.
- Linear trackers These have become our best
seller with today's larger systems and can be installed on roofs. We make four versions all of which are
rows of modules where the axis of rotation runs north-south and the
rotation is from east to west. The
simplest is simply horizontal with the modules edge to edge. We can also tilt the modules either
fixed or adjusted twice a year, which greatly increases the effectiveness
in the winter. The adjusted
version gives results almost as good as full tracking. Lastly we build a dual-axis version for
use with concentrator system. All
versions are modular so can be any size.
- Heliostats -- We have built a number of heliostats. Our tracker controllers can be used to control heliostats as
long as the heliostat is north of the target. We have also worked out a single axis heliostat, which is
not perfect but good enough for most applications. This is less expensive especially in
small sizes as might be used for solar cookers or classroom
demonstrations. It also can be
Self Powered as described above.
Please contact us for additional
Small Power Systems 74550 Dobie Lane, Covelo, CA 95428 707-983-8498