TECHNICAL SPECIFICATION
TITLE:
IEC INSTALLATION INSTRUCTION
MANUAL FOR THE CRYSTALLINE
SOLAR PHOTOVOLTAIC MODULE
SPEC. NO.:
CNPV-PS-M-S0010-IEC
REVISION: J
EFFECTIVE DATE:
July 2012
AUTHOR(S):
Bypina Veerraju Chaudary, Yang Xiaowu
Page 5 of 15
CNPV Dongying Solar Power Company Limited,
Shengli Industry Park, Dongying City, Shandong Province 257000, PRC
http//www.cnpv-power.com E-mail:
marketing@cnpv-power.com
Tel: +86-546-7795555, Fax: +86-546-7795777
10. BYPASS DIODES AND BLOCKING DIODES
Partial shading of an individual Module can cause a reverse voltage across the shaded SPV Module. Current is then
forced through the shaded area by the other Modules.
When a bypass diode is wired in parallel with the series string, the forced current will flow through the diode and
bypass the shaded SPV Module, thereby minimizing Module heating and array current losses.
In system utilizing a battery, blocking diodes are typically placed between the battery and the SPV Module output to
prevent battery discharge at night.
Diodes that are used as blocking diodes must: Have a Rated Average Forward Current [I
F(AV)
]
above
maximum
system current at highest Module operating temperature. Have a Rated Repetitive Peak Reverse Voltage [V
RRM
]
above
maximum system voltage at lowest Module operating temperature.
11. WARNING AND NOTES
The SPV Modules generate electricity when exposed to light. Array of many Modules can cause lethal electrical
shock and burn hazards. Only authorized and trained personnel should have access to these Modules. To reduce the
risk of electrical shock or burns, modules maybe covered with an opaque material during installation to avoid
electrical shocks or burns. Do not touch live terminals with bare hands. Use insulated tools for electrical connections.
Use appropriate methods to mount SPV Modules. Fall of Modules from high place will cause death, injury or
damage.
The SPV Module has a pair of male and female waterproof connectors. For a series electrical connection, connect
positive (+) connector of first SPV Module to negative (-) connector of the following Module.
Do not short the positive and the negative. Do not disconnect under load. Be sure connectors have no gap between
the insulators. In case there is a gap, a fire and/or an electrical shock may occur.
NOTES:
(1) Artificially concentrated sunlight shall not be directed on the SPV Module. The rated electrical characteristics are
within 10 percent of measured values under standard test conditions (Irradiance of 1000W/m
2
, AM 1.5 spectrum, and
cell temperature of 25°C).
(2) Under normal conditions, a solar photovoltaic Module is likely to experience conditions that produce more
current and/or voltage than reported at standard test conditions. Accordingly the value of Isc and Voc marked on this
Module should be multiplied by a factor of 1.25 when determining component voltage ratings, conductor current
ratings, fuse sizes, and sizes of controls connected to the SPV output.
(3) Details for wiring in accordance with the local regulations.
(4) If you install modules in parallel electrically, each module (or series string of modules so connected) shall be
provided with the maximum series fuse as specified.
