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Potential isolation
No conductive connection between two component parts.
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 generator
System comprising a number of PV modules.
Solar inverter
is an electrical device which converts DC direct voltage into AC voltage and/or direct current into
alternating current.
RJ45
Abbreviation for standardized eight-pole electrical connector connection. RJ stands for Registered
Jack (standardized socket).
RS485 (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.
Separate grid system
Energy supply equipment which is completely independent of an interconnected grid.
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 module
Part of a PV generator; converts PV energy into electrical energy.
String
Designates a group of electrical PV modules switched in series.
String solar inverter (solar inverter concept)
The PV generator is divided up into individual strings which feed into the grid over their own string
solar inverters in each case. In this way, the installation is considerably facilitated and the gain de-
crease, which can arise from the installation or from different shading conditions of the PV modules,
is considerably reduced.
TAB (2000)
The TAB 2000 are the technical regulations governing connection to the low-voltage grid operated
by distribution system operators in Germany. These Technischen Anschlussbestimmungen or TAB
for short have been in force since the year 2000. They dene the requirements imposed by DSOs
on the electrical systems operated by the end customers of utility companies.
VDE
Verband der Elektrotechnik, Elektronik und Informationstechnik e. V.
(Association of Electrical Engineering, Electronics and Information Technology).
VDEW
Union of German Electrical Power Stations.
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