
90 DOCR 070366-B
MPP
The Maximum Power Point is the point on the current-voltage (I-V) curve of an array or string, where
the product of current and voltage has it’s maximum value.
NEC
The National Electrical Code (NEC), or NFPA 70, is a United States standard for the safe installation
of electrical wiring and equipment.
Power dissipation
Power dissipation is designated as the difference between absorbed power and power of a device
or process yielded. Power dissipation is released mainly as heat.
PV cell
PV cells are large-surface photodiodes which convert light energy (generally sunlight) into electrical
energy. This comes about by utilization of the photoelectric effect (photovoltaics).
PV array
System comprising of a number of PV modules.
PV module
Part of a PV generator; converts PV energy into electrical energy.
RJ-45
Abbreviation for standardized eight-pole electrical connector connection. RJ stands for Registered
Jack (standardized socket).
RS-485 (EIA485)
Differential voltage interface on which the genuine signal is transmitted on one core and the ne-
gated (or negative) signal on the other core.
Inverter
is an electrical device which converts DC direct voltage into AC voltage and/or direct current into
alternating current.
String
Designates a group of electrical PV modules ammended in series.
UL
Stands for Underwriters Laboratory, an organization that sets standards for different product cat-
egories and tests products to make sure they meet the standards.
V
OC
Open Circuit Voltage
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