5
General Installation Manual
STANDARDS
EVPVxxx and EVPVxxxK series comply
with the requirements of UL61730.
FIRE CLASS OF PRODUCT
The EverVolt modules covered by this
manual have a Class C (referencing
UL790) and Type 2 fire classification
according to UL1703/UL61730.
The fire performance rating of the
modules is only valid when mounted in
the manner specified in this installation
manual.
The complete system fire class rating
is to be achieved by the combination
of module fire performance type and
UL2703 certified mounting structure
for a non-BIPV module.
Please refer to mounting structure
UL2703 listing for System Fire
Classification. Any specific limitations
on the inclination or accessories
required to maintain a specific System
Fire Class Rating must be clearly
specified in the mounting system
manufacturer’s installation instructions
and UL2703 certification.
Utilize the following fire safety
guidelines when installing EverVolt
modules:
• Check with all relevant local
authorities for fire safety
requirements for any building or
structure on to which the modules
will be installed.
• The system design must ensure
that it can be easily accessed in the
event of a building fire.
• Check with relevant authorities for
applicable regulations concerning
setbacks or other placement
restrictions that may apply for
roofmounted arrays.
• The use of DC ground fault
interrupters is recommended. This
may also be required by local and
national codes.
• All electrical appliances are a
fire risk. The module must be
mounted over a fire retardant roof
covering rated for the application
and a distance of at least 0.8 in
(20 mm) between the module and
the mounting surface, to allow the
free circulation of air beneath the
modules at all times.
JUNCTION BOX, TERMINALS,
AND CONNECTORS
• Modules equipped with three
junction box contain terminals for
both positive and negative polarity
individually, and bypass diodes.
• Each terminal is dedicated to one
polarity (with the polarity symbols
engraved onto the body of the
junction box) (see Figure 1).
• Each terminal is provided with
factory installed lead cables and a
latching connector for series and
string connections. Always use
these connectors and do not detach
them from cables.
• The PV module comes pre-wired.
Each module has two #12 AWG
type PV-wire stranded sunlight
resistant output cables each
terminated with connectors. The
positive (+) terminal has a male
connector while the negative (-)
terminal has a female connector.
The module wiring is solely for
series connections only, i.e. male
(+) to female (-) interconnections.
When making field wiring
connections to the pre-attached
connectors use only approved
connectors from Table 2.
• All connectors and cables must
be secure and tight as well as
electrically and mechanically
sound. UVresistant cables and
connectors approved for outdoor
use must be used. Conductor
gauge must be chosen to ensure
DC power losses (voltage drop) are
kept to a minimum (<1%).
• Observe all local regulations when
selecting cables.
• For string connections, use
minimum 12 AWG (4 mm2) or
copper wires insulated for a
maximum operating temperature
of 194°F (90°C).
• Avoid exposing cables to direct
sunlight and permanent tension.
• To ensure connector compatibility
and reduce the potential for
damage to the modules and the
wider installation, the connectors
used on the EverVolt modules
are detailed in the Figure 2. Only
permitted the mating of factory-
installed connectors to connectors
of the same manufacturer, type,
and system rating as shown in the
table below (Table.2).
• Latching connectors are type IV
and made by
STAUBLI ELECTRICAL
CONNECTORS AG
. Supplied
connectors listed by UL.
• In order to comply with NEC 2008,
a locking sleeve needs to be
used with all connectors that are
exposed.
• The locking sleeve (PV-SSH4) is
made by STAUBLI and can only be
released with a special tool also
made by STAUBLI (PV-MS). Locking
sleeves are not supplied with
modules and must be purchased
separately.
Figure 2. Connectors
CONNECTORS
Stäubli MC4 PV-KBT4/KST4,
12AWG(4 mm²) in accordance with
UL 6703 IP68 only when connected
Connector 1 + Connector 2
Permitted?
EverVolt Module
Factory-Installed
EverVolt Module
Factory-Installed
✓
EverVolt Module
Factory-Installed
Stäubli MC4
✓
EverVolt Module
Factory-Installed
Any other
connector
NG
Table.2 Approved connectors