© 2015 SunEdison
8
F-SERIES and R-SERIES
72-Cell Installation Guide
4.0 Electrical Installation
4.1 Planning and Design
All modules are manufactured with a sealed junction
box, pre-attached cables and locking connectors. These
components should not be modified or tampered with
in any way.
Note:
Installers shall ensure that the polarized locking
connectors are from the same supplier. Do not mix
polarized interlocking connectors from different
manufacturers—including connections at the inverter,
combiner boxes and modules. Doing so will void the
warranty. Refer to the corresponding data sheet for
connector types.
• Ensure connectors are clean and dry before
establishing connection.
• Ensure that all wire, fusing and disconnects are
appropriately sized for the system design according
to national, regional, and local codes.
• Electrical characteristics are within plus or minus 5% of
rated values for Isc, Voc, Impp and Vmp. Pmax ranges
between 0% to +3% (R-Series) and 0 W to +5 W
(F-Series) of rated Pmax at standard test conditions
(STC). However, modules will operate under conditions
that may be significantly different than STC. SunEdison
suggests multiplying specified ratings by a minimum of
1.25 or more when designing the system and balance
of system components. Refer to local codes before
planning and designing the system.
• Determine the maximum number of modules that may
be connected in series using the following formula
Ns = Vmaxs/Vocm
Where:
Ns
equals the maximum modules in series.
Vmaxs
equals the maximum system voltage.
Please refer to module data sheet for actual Vmax
rating, as some models are rated for 1000 V UL and
1000 V IEC.
Vocm
equals the module open circuit voltage at
coldest conditions for the site (refer to local codes).
4.2 Module Wiring
• The module includes wires and polarized locking
connectors from the junction box on the back of the
module. Field replacement of connectors or cables
must be avoided and will void the product warranty.
Polarized locking connectors of the same type, make
and manufacturer are required for all series string
wiring. The maximum operating temperature of the
wires and connectors should not exceed 85 C.
• When installing modules in landscape orientation, use
the 1.3 meter lead lengths to ensure enough cable
length to make adjacent module-to-module string
connections (assumes a maximum spacing of 50 mm
between adjacent modules).
• Always wire modules so that proper polarity is
maintained. Avoid placing excessive tension on
the cables.
• There is no limit to the maximum number of series
strings that can be combined in parallel. However,
each string must include overcurrent protection with a
maximum rating of 15 A. SunEdison recommends the
use of DC rated fuses or overcurrent protection devices
with the appropriate maximum voltage rating.
• Do not connect modules directly to a parallel bus.
• The cross-sectional areas of cable and the connector
type must be selected to align with the overall system
design, and should include the maximum short
circuit current of the system, maximum operating
temperatures and cable run lengths.
• For field connections, use at a minimum #12 AWG/4
mm
2
wires; insulated for a minimum of 85 C. Use
copper wire only.
WARNING:
Installers shall adhere to all applicable local, regional, and national codes and regulations when designing
and constructing the photovoltaic system
Note:
In colder climates, it may be necessary to further reduce the maximum number of modules in a series by using
Vocm at the minimum expected operating temperature.
