Installing KD Series Modules, Module Wiring

Table 1. Recommended Tilt Angles for Stand Alone Fixed Systems - Based on Winter Performance

SITE LATITUDE			FIXED TILT ANGLE
IN DEGREES

0°TO 15			15°
15°TO 25°			SAME AS LATITUDE
25	°	°	LATITUDE + 5°
		TO 30	LATITUDE + 10°
30	°	°
		TO 35	LATITUDE + 15°
35	°	°
		TO 40	LATITUDE + 20°
40°+

For grid tie installations where the solar modules are attached to a permanent structure, PV modules should be tilted at an angle equal to the site's latitude. This will typically result in the highest annual energy output.

7. INSTALLING KD SERIES MODULES

The minimum spacing of 50mm (2”) is required between PV module and the mounting surface around the perimeter of PV module. The frame of each PV module has 9mm (0.35”) diameter mounting holes (Refer to Module Mounting Specifications). These are used for fixing PV modules to the supporting structure. PV module frames must be attached to a support structure using M8 (5/16”) stainless steel screw in a minimum of four (4) places symmetrical on PV module. The stainless steel screw used for fixing the module frame should secure with an adequate torque. (usually, 19 N-m (14 ft-lb).) An example of a ground mounted structure is shown in Figure 2. The four holes close to the corners of the module are most often used for installation. Refer to the Mounting Specifications for the position of these holes. Clearance between PV module frame and the mounting surface may be required to prevent the junction box from touching the surface, and to circulate cooling air around the back of PV module. Spacing between PV modules must be a minimum of 1/8" (3.2 mm) to allow for thermal expansion. If the modules are to be installed on the roof or wall of a building, the stand-off method or the rack method is recommended.

STAND-OFF METHOD: PV modules are supported parallel to the surface of the building wall or roof. Clearance between PV module frames and surface of the wall or roof is required to prevent PV module and / or wiring from damage.

The recommended stand-off height is 4.5” (about 115 mm). If other mounting means are employed, this may affect the Listing For Fire Class Ratings.

RACK METHOD: The supporting frame is used to mount PV modules at correct tilt angles. PV modules specified in this installation manual are not designed for Building Integrated Photovoltaic (B.I.P.V) application as part of a roof or wall. The mounting design may have an impact on the fire resistance.

OTHER: Other method(s) certified by a registered professional engineer, and in compliance with local codes.

	MOUNTING HOLE
	ARRAY FRAME
SUPPORT	MODULE
LEGS	MODULE

FOOT ANGLE

Figure 2. Basic Rack or Stand-off Mounting Structure

8. MODULE WIRING

As shown in Figure 3 Standard Wiring Examples, Kyocera PV modules utilize the Type "IM" junction box (see J-box details). This junction box, located on the back side of the module, is weatherproof and is designed to be used with standard wiring or conduit connections. A cable clamp with a minimum rating of IP65 must be used to maintain the weatherproof integrity of the junction box. Bypass diodes are preinstalled at factory.

1-	+ 2	1-	+ 2
-	BLACK			12 VOLT (2 PARALLEL)
-				12 VOLT (2 PARALLEL)
+	RED
	RED
1-	+ 2	1-	+ 2
-	BLACK			24 VOLT (2 SERIES)
-				24 VOLT (2 SERIES)
+	RED
	RED			48 VOLT (4 SERIES)
				48 VOLT (4 SERIES)
1-	+ 2	1-	+ 2	1-	+ 2	1-	+ 2
-	BLACK			BLACK	BLACK
-
+				RED
				RED
EXAMPLE OF 'IM' TYPE J-BOX WIRING

Figure 3. Standard Wiring Examples

To wire Kyocera PV modules:

A.Determine the nominal system array voltage of your system. Each panel is equivalent to a 12 VDC nominal block. Standard array voltages 12, 24 and 48 volt are shown as examples in Figure 3.

B.Open the "IM" box cover by loosening the screws in the cover.

C.The wire used to interconnect PV modules may be single or two conductors, from 14AWG (2.08 mm2) up to 10AWG (5.26 mm2) gauge stranded copper wire, in a “SUNLIGHT RESISTANT” and insulated for 90℃ minimum jacket cable. This cable is suitable for applications where wiring is exposed to the direct rays of the sun. The maximum and minimum outer diameters of the cable that may be used with the cable connector are 8 mm and 6 mm respectively (Figure 4).

D.Using a flat blade screw driver, remove only the appropriate "KNOCK-OUTS" from the sides of the "IM" box.

E.Route wires through the knock-outs and clamps refer to installation example (see Figure 5).

F.Gently hand tighten the terminal screws with cross slot (Phillips -head) screwdriver. Do not over tighten, as the terminal can be damaged.

(Recommendation Torque : 1.5N-m (13.3 in-lb)

G.The output wiring from the final module is generally run to a separate array junction box. In commercial system, this wiring from the array box to the next component (i.e. fuse box. or charge regulator, etc.) is generally run in conduit. The maximum electrical rating of an acceptable series fuse is 15 amperes.

H.After checking that PV module wiring is correct, close all the junction boxes. Use a Phillips head screw driver to secure all screws on the junction box cover to ensure a waterproof seal.

I.Refer to the cable clamp specifications for KD135SX-UPU and KD140SX-UPU.

Refer to below for a cable clamp of our designation. (Manufacturer / Part Number)

Cable Gland : LAPP / S2212 (NPT-1/2")

Nut : LAPP / 911371K (NPT-1/2")

TERMINAL SCREW

SPRING WASHER

SQUARE WASHER

CABLE

Figure 4. Ring or Spade Terminal Connectors

NUT

CABLE CLAMP