11
EN
Parallel PV-Connector
Pay attention to
correct polarity
when connecting!
Connection of PV-modules in parallel configuration
only! Serial connection will damage the unit!
The electrical connection of the water heaters is
performed using the factory supplied MC4 plugs.
Check the functionality of the appliance after the
electrical connection has been performed. When all
supply connections are removed, the water heater
is completely disconnected from the power sources.
Connection of PV modules
IMPORTANT!
The installation and electrical par-
allel connection of PV modules may only be carried
out by a qualified person and may not endanger
third parties. When installing the photovoltaic mo-
dules, the locally prevailing rules and laws must be
complied with.
IMPORTANT!
Keep cables out of the way to avoid
tripping over them or getting caught. There is a risk
of injury. The cables must be fastened in such a way
that no tensile load is applied to the connectors.
Furthermore, it must be ruled out that the cables and
connectors rub against surfaces and edges (e.g. in
wind). The cables must not lie in water permanently.
IMPORTANT!
Only photovoltaic modules with a
maximum of 60 resp. 120 cells and an open-circuit
voltage of 42.4 V may be connected.
• Photovoltaic modules must be connected cor-
rectly using the factory supplied MC4 plugs.
• You may connect up to five modules in parallel.
Depending on the module, this corresponds to
an MPP output of approximately 1500 Wp.
Dimensioning of the required photovoltaic power:
• The higher the number of hours of sunshine per
day, the smaller the required PV power.
• The warmer the water taken from the pipeline,
the lower the required PV power.
• Dimension the required photovoltaic power
according to the months with the lowest solar
radiation in which the photovoltaic water hea-
ter will be in operation.
• The greater the amount of hot water consumed
per day, the larger the PV power required.
The following table serves as a guideline for dimen-
sioning the photovoltaic power needed depending
on the climatic conditions:
climatic
conditions
PVB-
10
PVB-
30
PVB-
80
countries with
low sunshine e.g.
Northern and
Central Europe
300 Wᵖ 600 Wᵖ 1200 Wᵖ
sunny countries
e.g. Southern
Europe and Africa
150 Wᵖ 300 Wᵖ 600 Wᵖ
These values given are guidelines. Depending on the
conditions prevailing on site and the specific con-
ditions of consumption, the appropriate design of
the photovoltaic output may vary from the values
described.
Extension of the photovoltaic line
When extending the photovoltaic cable, the MC4
contact plugs must be properly attached to ensu-
re functionality and safety. Basically, the PV cable
should be kept as short as possible. A length recom-
mendation depending on the connected nominal PV
generator power can be found in the following table.