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ELECTRICAL OUTPUT AND THERMAL CHARACTERISTICS
Rated electrical characteristics of Isc, Voc, are within ±10 percent of the indicated values and +5/-0 percent of Pmax (power
measurement tolerance: ± 3%), under STC (standard test conditions) (irradiance of 1000 W/m
temperature of 25 °C (77°F)).
Table-1. Electrical characteristics (at STC)
Maxim-
Tolerance
Model
um
name
Power
(Pmax)
ND-RG255
255 W
+5%/-0%
ND-RG250
250 W
+5%/-0%
(*) The maximum series number of modules depends on the local conditions. These values are calculated under the condition of
Voc at -40 °C.
Under normal conditions, a photovoltaic module is likely to experience conditions that produce more current and/or voltage than
reported at Standard Test Conditions. Accordingly, the values of Isc and Voc marked on this module should be multiplied by a
factor of 1.25 when determining component voltage ratings, conductor capacities, fuse sizes and size of controls connected to
the module output.
Application Class
This module is rated as "Application class A" according to IEC61730.
"Application class A" means:
General access, hazardous voltage, hazardous power applications
Modules rated for use in this application class may be used in systems operating at greater than 50 V DC or 240 W, where
general contact access is anticipated. Modules qualified as application class A in IEC 61730 are considered to meet the
requirements for safety class II.
FIRE RATING
This module is rated as "Fire safety class C" according to IEC61730.
Open-
Short-
Voltage at
Circuit
Circuit
Point of
Voltag
Current
Max. Power
e
(Isc)
(Vmpp)
(Voc)
37.9
8.95
30.2
37.5
8.88
30.0
Current at
Maximum
Point of
system
Max. Power
voltage
(Impp)
8.45
1000 V
8.35
1000 V
14
2
, AM 1.5 spectrum, and a cell
Over-
Application
class
current
protection
15 A
A
15 A
A
Maximum
series
configur-
ation (*)
21
21
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