SMA Webconnect Systems in SUNNY PORTAL - Manual (Page 63)

SMA Solar Technology AG 12 Glossary
User Manual SPortalWebcon-BA-en-13 63
12 Glossary
Azimuth angle
In the Northern hemisphere, the azimuth angle indicates by how many degrees the module surface
deviates from the compass point South. In the southern hemisphere, it indicates the deviation from the
compass point North. The azimuth angle is counted from south (0°) via west (+90°) with positive
values and from south (0°) via east (-90°) with negative values.
DHCP
DHCP is short for "Dynamic Host Configuration Protocol" and is a server service with which devices
are automatically integrated into a network. If DHCP is not activated in the network (e.g., at the
router), devices will need to be integrated in the network manually. An IP address and subnet mask
suitable for the network must be manually configured in the device to be integrated.
kWp
See peak power
Log file
A log file is an automatically logged protocol of events on a computer system. A log file contains
errors that occurred during operation of the computer system, for example.
Nominal power (kWp)
See peak power
Nominal PV system power in kWp
The nominal PV system power in kWp (kilowatt peak) is the maximum possible PV system power.
The nominal PV system power in kWp is also known as the nominal power of the PV system.
The peak power of a PV system is the aggregate peak power of all PV modules installed (see peak
power of a PV module). The peak power of a PV system can, for instance, be used to compare the
system yield and system costs with other PV systems. The peak power of a PV system is often referred
to as "system power (kWp)".
An installed system can rarely achieve peak power because it is not installed in laboratory conditions.
Peak power (kWp)
The peak power is the maximum power output calculated for a PV module under STC (Standard Test
Conditions).
The peak power is measured in watt peak (Wp), kilowatt-peak (kWp), or megawatt-peak (MWp).
Peak power is also called nominal power.
STC (Standard Test Conditions): Standardized test conditions in the laboratory, under which the
electrical characteristics of PV modules are measured. This enables the comparison of different
PV modules. The PV modules are subjected to a vertical irradiation of 1,000 W/m
2
, an ambient
temperature of 25°C and a wind speed of 1 m/s. The electrical characteristics are then measured.
The test conditions are designed to correspond to the ideal ambient conditions for operation of an
installed PV module.