Product specifications

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MASTERVOLT SOLAR SUNMASTER QS SERIES
PRODUCT FAMILY
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You can find more information about
the used technology on page 8 & 9; an
introduction to product development,
production and testing can be found on
page 10 & 11.
Solar and grid connections can be
made in two ways.
Either you use glands and the spring
terminals on the main board directly,
or you use a connector solution, just as
you prefer.
The Sunmaster QS inverters can be
supplied with Multi Contact material
for the solar connections and euro plug
connectors for the grid connection.
The front panel of the connection com-
partment can easily be replaced with a
version with the integrated QS display.
This display is connected to the QS
Communication Module, that can be
inserted directly in a socket on the
main board inside the cabinet.
This QS Communication Module also
provides the connections to the QS
Data Bus for external communication.
Read more about data communication,
monitoring
and control
options on
page 6 & 7.
The Sunmaster QS inverters are con-
trolled by sophisticated micro-control-
lers and power driver circuitry. These
electronics are situated on a separate
board, that can be inserted into a soc-
ket on the power board. The control
board is produced using SMD (Surface
Mounted Devices) technology, resul-
ting in a compact design. The control
boards are the same for every Sunmas-
ter QS inverter and can be replaced
easily when necessary. The control
boards can be reprogrammed with
updated or customer specified settings.
The Sunmaster QS inverters are equip-
ped with anti-islanding devices, that
ensure the switch off in case of grid fai-
lure. The standard anti-islandig device
is the QNS, based on grid voltage and
frequency measurement (redundant
measurement and switch off); the ex-
tended version is the VDE0126 com-
pliant ENS unit, which adds a grid
impedance measurement to the list.
Both the ENS and QNS control elec-
tronics are situated on separate control
boards.
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Easy installation: plugs or glands, just as you prefer it (QS3200).