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in the Northern Hemisphere is optimized when the
collector is mounted facing True South. Performance,
however, suffers very little when the collector is
oriented no more than 45° East or West of True South.
The collector should be unshaded by any permanent
obstacle between 9:00 a.m. and 3:00 p.m. on any day
of the year.
be unshaded for the majority of the day all
year round. Adjacent buildings and trees
should be checked for possible winter
shading. An instrument such as the Solar
Pathfinder can be used for solar site analy-
sis. (Solar Pathfinder can be reached at
605-528-6473).
3.4 Before the installation the contractor shall
inspect the condition of the roof and noti-
fy the homeowner of any existing roof
damage or necessary repairs.
3.5 The homeowner and contractor shall con-
firm the location of all roof and ground
mounted components in advance of the
installation.
4) INSTALLATION REQUIREMENTS - SPECIFIC
4.1 Collector Orientation
The performance of solar water heating systems
in the Northern Hemisphere is optimized when
the collector is mounted facing True South.
Performance, however, suffers very little when
the collector is oriented no more than 45° East or
West of True South. The collector should be
unshaded by any permanent obstacle between
9:00 a.m. and 3:00 p.m. on any day of the year.
4.2 Collector Tilt
Optimal annual efficiency is achieved by tilting
the solar collector at an angle that equals your
latitude plus an additional 10°. This tilt angle
favors the lower winter sun when collector per-
formance is at it’s lowest and minimizes over-
heating during the hottest summer months.
The solar collectors in a two collector staggered
mount installation must be spaced far enough
apart to prevent winter shading. Figure 2 and
P .4
fig.6
fig.4
fig.5
COMPOSITION SHINGLE MOUNTING
SHINGLE ROOF MOUNTING
REVERSE PITCH MOUNTING