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1.2.3
Angle of the Sun
The array orientation can dramatically affect the PV array output. The array energy output will vary
depending on the time of day and time of year as the sun's angle in relation to the array changes.
Sunlight output decreases as the sun approaches the horizons (such as in winter in Europe) due to
the greater atmospheric air mass it must penetrate, reducing both the light intensity that strikes the
array's surface and spectrum of the light. In general, one can expect only four to six hours of direct
sunlight per day depending on what part of the world the inverter is installed.
1.2.4
Partial Shade
Shading on a single PV module of the array can reduce the output power. Such shading can be caused
by something as simple as the shadow of a utility wire or tree branch on part of the array's surface.
The inverter is designed to maximize its power production in all of the above situations using the
sweep method MPPT algorithm.
1.2.5
Other Factors
Other factors that reduce power generation of a solar system are:
ˆ Dust or dirt on the modules.
ˆ Fog or smog.
ˆ Mismatched PV array modules, with slight inconsistencies in performance from one module to
another (A solar PV string consisting of solar panels with different power rating or same power
rating but different manufacturers is unacceptable).
ˆ Inverter efficiency.
ˆ Wire losses.
2
Important Safety Warning
Before using the inverter, please read all instructions and cautionary markings on the
unit and this manual. Store the manual where it can be accessed easily.
This manual is for qualified personnel. The task described in this manual may be performed by qual-
ified personnel only.
2.1
General Precautions
Convention Used:
WARNING!
Warnings identify conditions or practices that could result in personal injury.
CAUTION!
Caution identifies conditions or practices that could result in damaged to the unit
or other equipment connected.
WARNING! Before installing and using this inverter, read all instructions and cautionary markings
on the inverter and all appropriate sections of this guide.
5KW 3-Phase Grid Tied Solar Inverter
© Pyramid Electronics
4
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