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SAFETY, INSTALLATION AND OPERATION MANUAL

AVANCIS POWERMAX

PHOTOVOLTAIC MODULES

Grounding of PowerMax

Back Rails

Even when applicable regulations, code
requirements and standards do not re-
quire safety-related grounding, AVANCIS
strongly recommends grounding of
Power Max

module back rails in order to

ensure  voltage  between  back  rails  and
ground is zero under all circum stances.
This will increase the safety of the PV sys-
tem in case of malfunctions and protect
the  system  from  induced  over-voltage.
For  safety-related  grounding  of  the
Power  Max

module back rails, the back

rails are provided with grounding holes
(marked with grounding signs). These holes
should be used for grounding purposes
only and in accordance with the local reg-
ulations, code requirements and standards.
If permitted, AVANCIS recommends for
grounding to use the larger hole (diame-
ter 0.42 cm/0.17 inches) in combination
with a M4 bolt, nut and two star washers
(see the example). Please note: only ma-
terials should be used which do not cause
corrosion. Make sure that the grounding
bolts  do  not  touch  any  cable.  Other
means  and  methods  for  grounding  are
permissable as long as  approved by appli-
cable regulations, code requirements and
standards.

Functional Grounding

AVANCIS requires an earthing which en-
sures that the potential of the negative
pole of the PV assembly is always greater
than -10 V in comparison with the earth.
The inverter supplier’s specific guidelines
for the negative pole’s earthing must be
followed. The guidelines will depend on
the specific make and type of inverters
which are to be used in the PV system.
AVANCIS requires that only the inverters
and associated grounding kits or solutions
recommended by the inverter manufac-
turers are used to electrically ground sys-
tems with AVANCIS PowerMax

modules.

Bolt

Nut

Lock washer

Backside Mounting:

• PowerMax

modules should be fastened

using the four pre-drilled mounting
holes in the back rails. Use four M6 or
similar size steel bolts, with 4 nuts and
8 lock washers (all coated as described
in the AVANCIS clamp document), per
PowerMax

module.

Frontside Mounting:

• PowerMax

modules should be fas-

tened  using  four  steel  clamps  with  a
minimum  coating  as  described  in  the
AVANCIS clamp document applied to
the mounting lip at the  bottom of the
back  rails.  One  clamp  holds  two
PowerMax

modules except for the

PowerMax

module at the beginning

and end of a module row. For Power-
Max

modules at the beginning or end

of the PV system, clamps without the
45  degrees  parts  can  be  used.  Other
parts  such  as  steel  bolts,  nuts  etc.
should  be  delivered  by  the  customer
and these should all have a minimum
coating  as  described  in  the  AVANCIS
clamp document.

• In order to install a second module, make

sure that the clamps are placed over the
mounting  lip  of  the  first  module  and
slide  the  second  module  towards  the
first module. The mounting lip of the
second  module  will  automatically  lift
the clamp and the clamp will go down
again  after  the  mounting  lip  of  this
module is also under the clamp. Finally,
fix the clamp when the second module
is positioned in the right way.

• The clamps must be approved in writing

by AVANCIS prior to installation. See the
list of approved mounting hardware at
www.avan cis.de. A paper copy of this
list can be ordered from AVANCIS on
request. Do not apply pressure on any
other position than described here.

Example