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PHOTOVOLTAIC MODULES SAFETY
AND INSTALLATION MANUAL Rev. M
VALID IN NORTH AMERICA ONLY
Valid from February 2011
1305 South Bertelsen Road, Eugene, Oregon 97402, USA
www.grapesolar.com
Tel: 1-877-264-1014 (toll free), 1-541-349-9000, Fax: 1-541-343-9000
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grounding hole at the back of the module. Place the ground lug on the module frame’s
outer surface and in-line lengthwise. Insert a #8-32 x 0.5” stainless steel screw through
the ground lug and frame, and secure from behind with a #10 stainless steel star washer
and nut. Torque the screw to 25 inch lbs (2.8Nm).
4.3.2
Use the UL listed grounding and bonding equipment (KDER), e.g. SOLKlip type
1954381-1, by Tyco Electronics Corp (E69905), to provide a reliable grounding
connection to the module frame.
4.3.3
Use a set of stainless steel grounding and bonding equipment including bolt/nut/cupped
washer/flat washer/serrated washer to provide a reliable grounding connection to the
module frame (refer to Figure-1). A flat washer is required between serrated washer and
Φ2.5mm grounding wire. A cupped washer is required between grounding wire and the
nut (with torque less than 4N•m). Grounding wire should be directly connected with the
screw.
4.4
The rack must also be grounded unless they are mechanically connected by nuts and bolts to the
grounded PV modules. The array frame shall be grounded in accordance with NEC Article 250.
Figure-1 Grounding panel frame with stainless steel grounding & bonding equipment
5.
Mounting
5.1
The modules have been evaluated by UL that can sustain a positive or negative design loading
of 30 lbs/ft
2
(1600 Pascal). The maximum mechanical load on the module must not exceed 50
lbs/ft
2
(2400 Pascal) under any circumstance.
5.2
Each module must be securely fastened at a minimum of 4 points using support frames or
mounting kits specialized for PV applications.
5.3
Panels may be mounted at any angle from vertical to horizontal orientation. However, to obtain
maximum yield from the PV system, the direction and tilt angle for the modules shall be set to
1
Stainless steel M5 nut
2
Stainless steel cupped M5 washer
3
Stainless steel flat M5 washer
4
Stainless steel M5 serrated washer
5
Grounding lead
6
Stainless steel M5 bolt
