Safety and Installation Manual
1
st
Generation 2
nd
Generation 3
rd
Generation
Drawing 3: Clamp mounting positioning
Drawing 4: Frame Generations
6.0
Electrical Installation
➢
PV modules of different size and/or electrical configurations must not be used in the same system.
➢
Open Renewables
®
PV modules are factory-equipped with cables and connectors for easy interconnect in series.
➢
Cover all modules in the PV array with an opaque cloth or material before making or breaking electrical
connections.
➢
Open Renewables
®
recommends that all wiring be double insulated with a minimum temperature rating of
110°C. All wiring should use flexible copper (Cu) conductors. The minimum size should be determined by the
applicable codes. We recommend a size not less than 4mm
2
. The insulation type should be appropriate for the
type of installation method used and must meet SKII (Safety Class II) and IEC 61730 requirements."
➢
Match the polarities of cables and terminals when making the connections; failure to do so may result in
damage to the PV module.
➢
Ensure that all electrical connections are secure and tight.
➢
A bypass-diode is integrated in one of the 2 PV module junction boxes. This diode is not user-replaceable. The
junction box must not be opened in the field. Doing so will void the warranty.
➢
When connecting module in series be aware the module voltages will be summed. The maximum number of PV
modules being connected in series must be calculated in line with the applicable regulations in such a way that
the specified maximum system voltage of the PV module and all other electrical DC components will not be
exceeded in open-circuit operation.
➢
Not more than 2 PV modules or module strings shall be connected in parallel without using series fuses rated at
20 Ampere minimum.
➢
PV modules with a suspected electrical problem should be returned to Open Renewables
®
for inspection and
subsequent actions as described in the Open Renewables
®
LIMITED WARRANTY FOR PV-MODULE(S).
6.1
Safety-related grounding of module frames
➢
Open Renewables
®
strongly recommends grounding of PV module frames even when applicable regulations,
code requirements and standards do not require any safety-related grounding. On 1
st
and 2
nd
generation frames
the long frame rails are provided with holes should be used for grounding purposes only and in accordance
with the local regulations, code requirements and standards, as per drawing 4, bellow. On the 3
rd
generation
the any of the corner pieces can be used to connect the module to ground using a self tapping screw, ST 4.8
with a length between 6 and 16mm.
Page 8 of 12
Document ID: OR-MA-2XX Revision 4.50 04-03-2013
© 2013 Open Renewables
®
– All rights reserved
EN
Applicable only in European Union
