Installation Guide

7
an extra component such as a combiner box or an MC4 adaptor for parallel
strings. Renogy recommends that only sunlight resistant cables be used
with the minimum wire size being 4mm
2
in diameter.
Wiring
Type
Ratings
PV Wire
PV1-F1x4.0mm
2
Rated Voltage: 1800VDC
-40ׄ°C Up to 120°C
MC4 Connectors
LJQ-1
Rated Voltage:1800VDC
Rated Current: 16A
-40°C Up to 120°C
Junction Box
PV-JM801
Rated Voltage: 1000VDC
Up to 15A
 MC4 cables are intended for use on the output wiring of a module or
panel and comply with the Standard for Connectors for use in
Photovoltaic Systems, UL 6703, see module literature for appropriate
mating connectors.
 Keep connectors dry and clean and ensure that caps are tightly
sealed before connecting modules
 Faulty connections can result in electrical shock so make sure to
fasten all connections securely.
 Renogy modules can be installed in landscape or portrait orientation.
Make sure that the proper distance between the panels and the
surface to allow for air circulation.
Portrait Orientation Landscape Orientation
 Series Connections are just plug and play with the male and female
MC4 connectors
 Parallel connections will utilize MC4 branch connectors for
centralizing all positive and all negative connections.
 Appropriate MC4 connectors will have a manufacturer name of the
following:
Model
Renogy
Forward Electronics
Jiangsu Forward Electronic Technology Co., Ltd
No. 291 East Street, Zhulin Town, Jintan City, Jiangsu 213241 China
 Compatible manufacturers to Forward Electronics include Multi-
Contact exclusively,
o Female Type Multi-Contact KBT4/6I-UR (A: 4 - 6 mm², D:
5. 5 - 9 mm) (1302020)
o Male Type Multi-Contact KST4/6II-UR (A: 4 - 6 mm², D: 5.
5 - 9 mm)
 Marking or unique physical features for the connectors will include
the physical company name, a do not disconnect symbol, a TUV
certification symbol on the actual connector, and a polarity band
whether it be red or black,
5.2 Bypass Diodes
The junction boxes used with the Renogy modules contain bypass
diodes that are wired in parallel with the PV string cells. In the event the
modules experience partial shading, the diodes are activated to bypass
the current generated by the non-shaded cells, therefore limiting module
heating and performance losses. However, they do not protect the panel
from over-current. Over-current protections devices must be used when
connecting more than 2 modules in series.
If the bypass diodes are suspected of failure, installers or maintenance
personnel should contact the company (Renogy).
Model
Rating
SPA2040
Tj Max = 200°C, if 20A
 In systems with more than two modules in series, high reverse
current can flow through cells that are shaded partially or outright