Panasonic Photovoltaic Module HIT 240w Installation Manual

							 
 
1 
 
General Installation Manual 
Photovoltaic Module HIT® 
 
HIT Power 240S series 
HIT Power 235S series 
HIT Power 230S series 
 
Thank  you  for  choosing Panasonic HIT®. 
Please  read  this  manual  completely 
before  installation  or  use  of Panasonic 
PV(photovoltaic) modules.  With  proper 
operation  and  maintenance, Panasonic 
HIT® will  provide  you  with  clean, 
renewable  solar  electricity  for  many 
years.  This  manual  contains  important 
installation,  maintenance  and  safety 
information.  The  word  “module”  as 
used  in  this  manual  refers  to  one  or 
more  PV  modules.    Retain  this  manual 
for  future  reference. The  module  is 
considered  to  be  in  compliance  with  UL 
1703  only  when the  module  is  mounted 
in  the  manner  specified  by  the 
mounting instructions below. 
 
SANYO  is  part  of  the  Panasonic  Group 
and  is  in  charge  of  the  manufacturing 
process for Panasonic HIT®. 
 
 
 
Model No. 
HIT Power 240S 
 VBHN240SA11 and 11B 
HIT Power 235S 
 VBHN235SA11 and 11B 
HIT Power 230S 
 VBHN230SA11 and 11B 
Contents 
 
Please read before installation 
Safety Precautions 
 General Information  :3 
 Warning   :3 
 Cautions   :3 
 General Safety  :3 
 UL Listing Information :3 
 
Installation 
 General   :4 
 Notes on Installation  :4 
 Operating Conditions  :5 
 
Specifications 
 Note on Specifications :5 
 Mechanical Loading  :5 
 
Wiring 
 General   :5 
 Module Wiring  :5 
 Array Wiring   :5 
 Earth Ground Wiring  :5 
 Grounding Locations  :6 
 Grounding Methods  :6 
 Module Terminations  :8 
 Junction Box and Terminals :8 
 Conduit   :8 
 
Bypass Diodes   :8 
 
Maintenance   :8 
 
Disclaimer of Liability  :8 
 
Customer Services   :8 
 
 
 
 
 
 
“HIT” is  a  registered  trademark  of 
Panasonic Group. 
 
Other  product  and  service  names  listed 
in  this  manual  are  trademarks  or 
registered  trademarks  of  their 
respective companies. 
 
 
 
                                    
VBHNxxxSA series  
						

							 
 
2 
 
Edition Revision Date Revised Item Revised Content 
New Edition 2013.4.19   
2nd Edition 2015.3.18 
(1) System Fire Class Rating 
(2) Trademark 
(3) Front cover, Grounding 
(1) Addition of System Fire Class Rating 
(2) Explanation of trademark 
(3) According to UL1703 Edition 3 
 – Revision date 2014/11/18  
3rd Edition 2015.9.29 Warning Addition of Warning 
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
     
						

							 
 
3 
 
Safety Precautions 
General Information  
The  installation  of  solar  modules 
requires  a  great  degree  of  skill  and 
should  only  be  performed  by  qualified 
licensed  professionals,  including, 
without  limitation,  licensed  contractors 
and electricians.  
 
  WARNING 
 
 All  instructions  should  be  read  and 
understood  before  attempting  to 
install, wire, operate, and maintain a 
photovoltaic module.  
 Contact  with  electrically  active  parts 
of  the  module  such  as  terminals  can 
result  in  burns,  sparks,  and  lethal 
shock  whether  the  module  is 
connected or disconnected. 
 The  installer  assumes  the  risk  of  all 
injury  that  might  occur  during 
installation,  including,  without 
limitation, the risk of electric shock. 
 The modules  generate  DC  (direct 
current)  electrical  energy when 
exposed  to  sunlight  or  other  light 
sources.  Even  a  single  module 
produces  enough  voltage  and 
current,  to  cause  shocks  and  burns  if 
safety precautions are not followed. 
 The  shock  hazard  increases  as 
modules  are  connected  in  parallel, 
producing  higher current,  and  as 
modules  are  connected  in  series, 
producing higher voltages. 
 To  avoid  the  hazard  of  electric 
sparks,  shock,  fire,  burns,  damage 
and injury: 
 Work only in dry conditions, with dry 
modules and dry tools. 
 Do not stand or step on modules. Do 
not  puncture,  cut,  scratch or 
damage the backsheet of a module. 
Backsheet  damage  will  void  a 
module’s  Limited  Warranty  and 
may  cause  fire.  Never  use  modules 
with a damaged back sheet.  
 Do not  hit the backsheet  of  a 
module by the connector or other 
things. 
 Do  not  allow  children  and 
unauthorized  persons  near  the 
installation  or  storage  site  of 
modules. 
 Completely ground all modules. 
 Do  not  disassemble a module, 
attempt  any  repair,  open  the 
junction  box  cover, nor  remove  any 
parts  installed  by Panasonic. There 
are  no  user  serviceable  parts  within 
the module or junction box. 
 Unauthorized  persons - except  the 
qualified  licensed  professional - 
should  not    perform  any  electrical 
work, including wiring, 
 Wear  suitable  clothing,  guards, eye 
protection  and  gloves  to  prevent 
you from direct contact with 30 VDC 
or greater. 
 Wear  non-slip  gloves and  carry 
modules  by  the  frame  using  both 
hands.  Do  not  attempt  to  carry  a 
module by yourself. 
 Do not carry a module by its wires or 
junction box. 
 Do not drop anything on the surface 
of a module. 
 Ensure  all  system  components  are 
compatible,  and  they  do  not  subject 
the  module  to  mechanical  or 
electrical hazards. 
 Sparks  may  occur;  do  not  install 
modules  where  flammable  gases  or 
vapors are present. 
 Never rest  or  leave  a  module 
unsupported or unsecured. 
 Do not drop modules. 
 Do not use or install broken modules. 
 Do  not  artificially  concentrate 
sunlight on a module. 
 Do  not  touch  the  junction  box 
terminals. 
 Do  not  change  the  wiring  of  bypass 
diodes. 
 Do not touch a module unnecessarily. 
The glass surface and frames get hot. 
There is a risk of burn. 
 
  CAUTIONS 
 Use  a  module  for  its  intended 
purpose only. 
 Do  not  treat  the  back  sheet,  frame, 
or  front  surface  with  paint  or 
adhesives,  to  avoid  reducing  its’ 
functionality,  damage,  and  causing 
inoperable  conditions,  and  other 
unknown troubles. 
 Do not insert PV cable between back 
side and mounting structure rail. 
 
GENERAL SAFETY  
 Follow  all  permissions,  installation 
and inspection requirements.  
 Before  installing  modules,  contact 
the  appropriate  authorities  having 
jurisdiction  to  determine  permissions, 
installation  and  inspection 
requirements,  which  should  be 
followed.  
 Electrically  ground  modules  for  all 
systems  of  any  voltage.  If  not 
otherwise  specified,  it  is 
recommended  that  requirements  of 
the  latest  National  Electrical  Code 
(USA)  or  Canadian  Electric  Code 
(Canada)  or  other  national  or 
international  electrical  standards  be 
followed.  Refer  to  “Earth  Ground 
Wiring”  section  for  more 
information. 
 Be sure that the building or structure 
(roof,  façade,  etc.)  where  the 
modules  are  being  installed  has 
enough strength to support the load 
of the modules.  
 For  modules  mounted  on  roofs, 
special structures may be required to 
help  provide  proper  installation 
support.   
 The fire rating of this module is valid 
only  when  mounted  in  the  manner 
specified  in  the  mechanical 
mounting instructions.  
 Both,  roof  construction  and  module 
installation  design  have  an  effect  on 
the  fire  resistance  of  a  building. 
Improper installation may contribute 
to fire hazards.  
 The  models  in  this  instructions  are 
suitable to  maintain  the  System  Fire 
Class  Rating A when  used  with  a 
Listed  mounting  system  and  a  roof 
covering  that  have  been  rated  as  a 
Class A System  when  installed  on  a 
steep  slope  roof  and/or  a  low  slope 
roof with Type 2 modules.  
 Additional  devices  such  as  ground 
fault,  fuses,  and  disconnects  may  be 
required. 
 Do  not  use  modules  of  different 
specifications in the same system.  
 Follow  all  safety  precautions  of 
other  system  components  which  are 
used. 
 
UL Listing Information 
To  satisfy  UL  requirements,  when 
installing the modules, be sure to:  
1) Use  only  stranded  or  solid  copper 
single–conductor  sunlight-resistant 
cable  rated  for  outdoor  use  (e.g. 
type UF or USE) , for all wiring that is 
exposed to weather. 
2) Observe  the  requirements  described 
in  sections  labeled INSTALLATION 
and SPECIFICATIONS. 
  
						

							 
 
4 
 
INSTALLATION 
General 
Please  read  this  guide  completely 
before  installing  or  using  your 
Panasonic PV  modules.  This  section 
contains  important  electrical and 
mechanical specifications. 
 Modules  should  be  firmly  fixed  in 
place  in  a  manner  suitable  to 
withstand  all  expected  loads, 
including wind and snow loads.  
 Metals  used  in  locations  that  are 
exposed  to  moisture  shall  not  be 
employed  alone  or  in  combinations 
that  could  result  in  deterioration  or 
corrosion. 
 Install  modules  where  they  are  not 
shaded  by  obstacles  like  buildings 
and  trees.    Pay  special  attention  to 
avoid  partially  shading  the  modules 
by objects during the daytime.  
 If  needed,  contact  an  Authorized 
Representative  with  questions 
regarding  mounting  profiles  for 
Panasonic HIT®. 
 
Notes on Installation  
 Clearance  between  the  roof  surface 
and  module  frame  is  required  to 
allow  cooling  air  to  circulate  around 
the  back  of  the  module.  This  also 
allows  any  condensation  or  moisture 
to  dissipate.    Install  modules  with  a 
minimum  of 1 inch  clearance 
between  the  roof  surface  and  the 
modules so that air can circulate. 
 Panasonic recommends  the 
installation  method  and  mounting 
profile shown in Figure 1  
 A  module  should  be  attached  on  a 
mount  or  support  structure  rail  by 
corrosive-resistant metal clamps. 
 The  clamps  should  be  made  of 
aluminum  alloy  or  other  material 
that  will  reasonably  protect  against 
a risk of electrolytic corrosion.   
 Recommendation  of  bolt  torque 
range: 16N.m to 20N.m  
 The  module  was  tested  using  Unirac 
clamps  with  the  specifications see 
figure 1 and below;  
 Provider: UniRac, Inc. 
 Part number: SolarMount®   
 Clamps  type:  Top  Mounting  
Clamps 
 Clamp  size:Mid  clamp  and  End 
clamp, C size, 
 Unirac Part No. 302003, 302101  
 Width: 1.5”(38 mm) 
 Thickness :  0.12”(3 mm) 
  
  
  
  
Installation (reference) 
Solar Module 
Metal clamp B 
(2 places) 
Metal clamp A 
(2 places) 
Mounting 
Structure Rail 
Metal clamp B Solar Module Metal clamp A 
Mounting  Structure 
Rail 
Metal  clamp 
B 
Module 
Mounting Structure 
M8 Nut 
Metal clamp A 
M8 Bolt 
M8 Bolt 
M8 Nut 
End of Module 
Between Modules 
Figure 1.  Installation 
1.5” 
(38mm) 
0.12”  
(3mm) 0.2” (5mm) 
1.37” 
(35mm) 
0.18” 
(4.6mm) 
Mounting Structure 
Module 
0.62” 
(16mm) 
0.43” 
(11mm) 
0.2” (5mm) 
0.12”  
(3mm) 
0.2”  
(5mm) 
0.2”  
(5mm) 
0.2”  
(5mm) 
1.5” 
(38mm)      
						

							 
 
5 
 
 Torque range: 16N.m to 20N. 
 Material:  Aluminum  Alloy (6005-
T5, 6105-T5, 6061-T6) 
 If  another  clamp  except  Unirac  is 
used  it  must  have  material  (alloy 
designations),  physical  dimension 
and  capture  area  with  specifications 
as bellow; 
 Thickness :  0.12”(3 mm) or more 
 Material:  Aluminum  Alloy  (6005-
T5, 6105-T5, 6061-T6) 
 Panasonic does  not  provide  a 
warranty  for  clamps.  The  module 
warranty Panasonic provides shall be 
voided  if  clamps  selected  by  the 
customer  are  of  an  improper 
material or size 
 
Operating Conditions 
Panasonic requires  that  modules  are 
operated  within  the  following 
Operating Conditions: 
1) Terrestrial  applications  only—no 
outer  space  or  Special  Conditions 
(see below). 
2) The  ambient  temperature  must  be 
within –20°C  (-4°F)  to  40°C  (104  °F).  
The  temperature  limits  are  defined 
as the Monthly Average High or Low 
of the installation site.   
3) The  wind  pressure  load  of  the 
installation  site  should  be  less  than 
2,400N/m2 (50PSF)  
4) Some  environmental conditions 
could  apply.  Please  refer  to 
Panasonic’s warranty exclusions. 
 
SPECIFICATIONS 
Notes on Specifications 
1) Rated  electrical  characteristics  are 
within –5%  to  +10%  of  the  values 
measured  at  Standard  Test 
Conditions (STC). STC conditions are; 
Irradiance  of  1000W/m2,  25°C cell 
temperature,  and  solar  spectral 
irradiance  per  IEC  60904-3.  Note:  At 
the  time  of  shipment, Panasonic 
guarantees  the  output  level  of  its 
modules  to  be -0/+10%  against 
Rated  Power  in  SPECIFICATIONS 
based  on  factory  inspection  at  STC 
conditions.  
2) Under real conditions, a photovoltaic 
module  may  experience  conditions 
that  produce  more  current      and/or 
voltage  than  reported  at  Standard 
Test  Conditions.  Therefore,  the  Isc 
value  of  modules  should  be 
multiplied  by  a  factor  of  1.25  to 
determine  ampacity.  An  additional 
factor  of  1.25  may  be  required  for 
sizing conductors, fuses, disconnects, 
etc.  Please  refer  to  section  690.8  of 
the  National  Electric  Code  (NEC)  for 
guidelines. The Voc must be factored 
according  to  the  lowest  recorded 
ambient temperature  recorded  for 
the  location  where  the  modules  will 
be  installed.  Please  refer  to  section 
690.7  of  the  NEC  for  more 
information  regarding  voltage 
temperature factors. 
3) The  current  output  for  the  modules 
shown  in  the  SPECIFICATIONS 
section  is  measured  at  Standard  Test 
Conditions.  These  conditions  may 
not  be  frequently  observed  in  actual 
practice. 
 
Mechanical Loading 
 The  modules  should  be  mounted  at 
the  four  (4)  quarter  points  by  the 
means shown in Figure 2.   
 This  method  offers  a  maximum  load 
of  2,400N/m2  (50PSF)  in  a  static 
state on the module surface. 
 Note:  This  mechanical  loading  value 
was  tested  using  the  mounting 
device  specified  in  section  “Notes  on 
Installation”. 
 
WIRING 
General 
 All  wiring  should  be  done  in 
accordance  with  applicable  electrical 
codes. 
 Wiring  methods  should  be  in 
accordance  with  the  NEC  in  USA  or 
CEC in Canada. 
 A  qualified,  licensed  professional 
should do all wiring. 
 Wiring  should  be  protected  to  help 
ensure  personal  safety  and  to 
prevent damage.  
 All  modules  connected  in  series 
should  be  of  the  same  model 
number and/or type.  
 Do  not  connect  modules  in  parallel 
without  using  a  connection  box that 
connects  appropriate  FUSE  for  each 
series string or each module. 
 Do  not  disconnect  terminals  while 
modules  generate  electricity  and 
connect  electrical  load  to  avoid  the 
hazard of electrical shock. 
 To avoid the hazard of electric shock 
and sparks,  please  connect  each 
cable after confirming the polarity of 
them is correct. 
 Cable  conduits  should  be  used  in 
locations  where  the  wiring  is 
inaccessible  to  children  or  small 
animals. 
 
Module Wiring 
 The  number  of  modules  that  can  be 
wired in series is recommended to be 
ten  (10)  or  fewer.    If  connecting 
eleven  (11)  modules  in  series,  check 
local  temperature  conditions  and 
follow  the  National  Electric Code 
(690.7)  to  ensure  compliance  with 
maximum voltage limitations. 
 Modules  are  not  designed  for  “off-
grid”  or  battery  charging  systems, 
because  of  their  operating  voltage. 
Therefore,  it  is  not  recommended  to 
use them for charging batteries. 
 These  modules contain  factory 
installed  bypass  diodes.  If  these 
modules are incorrectly connected to 
each other, the bypass diodes, cable, 
or junction box may be damaged. 
 
Array Wiring  
 The  term  “array”  is  used  to  describe 
the  assembly  of  several  modules  on 
a  support structure  with  associated 
wiring.  
 Use  copper  wire  which  insulation  is 
sunlight  resistant  and  can  withstand 
the  maximum  possible  system  open 
circuit voltage. 
 Interconnection  of  modules  must  be 
performed  in  a  professional  fashion. 
Wires  should  be  secured  and  only 
reasonable slack should be allowed. 
 Check local codes for requirements. 
 
Earth Ground Wiring 
 A  module  with  exposed  conductive 
parts  is  considered  to  be  in 
compliance  with  UL  1703  only  when 
it  is  electrically  grounded  in 
accordance  with  the  instructions 
presented  below  and  the 
requirements  of  the  National 
Electrical Code. 
 All modules  should  be  grounded.  All 
structures  or  metallic  components  in 
direct  contact  with  the  modules  or 
electric  wires  should  be  properly 
grounded  too.  To  avoid  the  hazards 
of  electric  shock  or  fire,  modules 
should  be  grounded  by  the  frame 
only  at  the  locations  marked  in  this 
manual  (see  grounding  methods 
below).  
						

							 
 
6 
 
Ground Location  
(smaller holes for self-tapping machine screw) 
Junction Box 
Label 
Backside 
The ground holes are  on  the  backside  of the module frame. 
Figure 3.1 
Module Ground Position 
Ground Location  
(larger holes for bolt and nut) 
 The array frame shall be grounded in 
accordance  with  NEC  Article  250 
(USA) or the CEC in Canada. 
 Bonding shall be by a positive means, 
such  as  clamping,  riveting,  bolted  or 
screwed  connectors,  or  welding, 
soldering  or  brazing.  If  the  bonding 
means  depends  upon  screw  threads 
two  or  more  screws  or  two  full 
threads  of  a  single  screw  must 
engage the metal 
 Great  care  should  be exercised  to 
ensure  that  corrosion  caused  by  the 
grounding means be avoided. 
 Corrosion can increase the resistance 
of  the  grounding  connection  on  the 
module,  or  can  even  cause  the 
grounding connection to fail entirely. 
Corrosion  can  be  caused  by  the 
effects  of  weather,  humidity,  dirt 
and  so  on.  It  can  also  be  caused 
when  two  dissimilar  metals  are  in 
contact (galvanic reaction).  
 The  module  frame  material  is 
aluminum/magnesium alloy. 
 All  fasteners  (nuts,  bolts,  washers,  
screws,  etc.)  must  be  stainless  steel 
unless otherwise specified. 
 Length  of  self-tapping  machine 
screw or  bolt  should  not  be  more 
than  0.78’’  (20  mm)  in  order  to 
avoid  contacting  the  back-sheet  of 
the module. 
 Acceptable  grounding  wire  is 
following. 
Ilsco  Corp.  GBL-4DBT  10-14AWG-
Solid,  4-6,  8,  10-14AWG-Strand 
Burndy  L L  C  CL501TN  14AWG-Solid, 
14-4AWG-Strand 
Tyco  Electronics  Corp.  1954381-
1/1954381-2 10-12AWG Solid 
 Each ledge on the module frame has 
two  smaller  holes  for  self-tapping 
machine  screws  (0.165’‘diameter 
(4.2  mm))  and  two  larger  holes  for 
bolts  (0.205’‘diameter  (5.2  mm)).  
These ground holes are marked with 
a  “G”  adjacent  to  their  location  on 
the frame rail (see Figure 3.1). 
 Ground  wires  must  be  connected  to 
the  module’s  metal  frame  at  one  of 
these locations. 
 Lay-in  lugs  or  grounding  clips  can  be 
used  to  ground Panasonic PV 
modules. Both  methods  are 
explained below, please choose one. 
 
Grounding  Locations  (or  grounding 
holes) 
Using  a  self-tapping  machine  screw (see 
Figures 3.2 and 3.4) 
 If  using  this  method,  use  one  of  the 
smaller  holes  with  diameter  of 
0.165’‘ (4.2 mm)  
 The  self-tapping  machine  screw size 
must  be  No.10  (0.190’‘diameter 
(4.83mm)). 
 This  method  requires  a  minimum 
number  of  threads-per-inch  to 
achieve  an  adequate  electrical 
connection.  For  a  single  screw,  the 
thread  pitch  must  be  at  least  32 
threads per inch (TPI). A single screw 
less  than  32  TPI  does  not  provide 
sufficient  thread  contact.  Note:  Self-
tapping  machine  screws  are  also 
called thread cutting screws. 
 Recommended  torque value in 
tightening  self-tapping  machine 
screw is 2.3 N.m (20in-lb). 
 
Using  bolt  and  nut (see  Figures  3.3  and 
3.5) 
 If  using  this  method,  use  one  of  the 
larger  holes  with  diameter  of 
0.205’‘ (5.2 mm)  
 The  bolt  and  nut  size  should  be 
No.8  (0.164’‘diameter  (4.16 
mm)),  or  No.10  (0.190’‘diameter 
(4.83  mm))  or  M5 
(0.197’‘diameter (5.0 mm)). 
 Star  washers  must  be  used  to 
make  contact  through  the 
anodization of the module frame.  
 In  this  case,  the  screw  threads  are 
not  providing  the  electrical  ground 
contact. 
 Recommended  torque  value in 
tightening  bolt  and  nut is  2.3  N.m 
(20in-lb). 
 
Grounding Methods 
 Where  common  grounding 
hardware  (nuts,  bolts,  star  washers, 
spilt-ring  lock  washers,  flat  washers 
and  the  like)  is  used  to  attach  a 
listed  grounding/bonding  device, 
the attachment  must  be  made  in 
conformance  with  the  grounding 
device manufacturers instructions. 
 Common  hardware  items  such  as 
nuts,  bolts,  star  washers,  lock 
washers  and  the  like  have  not  been 
evaluated  for  electrical  conductivity 
or  for  use  as  grounding  devices  and 
should  be  used  only  for  maintaining 
mechanical  connections  and  holding 
electrical  grounding  devices  in  the 
proper  position  for  electrical 
conductivity.  Such  devices,  where 
supplied  with  the  module  and 
evaluated  through  the  requirements 
in  UL  1703,  may  be  used  for 
grounding  connections  in 
accordance  with  the  instructions 
provided with the module. 
   
						

							 
 
7 
 
Wire  connection  using  cup  washers (see 
Figures 3.2 and 3.3) 
 The  use  of  cup  washers  is  to  prevent 
wire  from  slipping  out  from  under 
the  screw  head  (and/or the  flat 
washer). 
 Make  sure  that  the  cup  washer  is 
placed  between  the  wire  and  the 
module frame. 
 Choose an adequate size for the cup 
washer  and  the  flat  washer  so  that 
the  wire  is  fully  clamped  between 
them. 
 Note:  Cup  washers  are  also  called 
terminal cup washers.   
 The  cup  washers  should  be stainless 
steel,  or  a  cup  washer  made  of  brass 
may  be  used  only  if  a  large  flat 
washer  made  of  stainless  steel  is 
inserted  between  the  module  frame 
and the cup washer. 
 Choose  the  adequate  size  for  the 
large  flat  washer (between  the 
module  frame  and  the  cup  washer) 
so  that  the  cup  washer  doesn’t 
contact  the  module  frame  and  is 
fixed stably to the module frame. 
 
Method  1- Use  a  self-tapping  machine 
screw (see Figures 3.1 and 3.2) 
 If  using  this  method,  use  one  of  the 
smaller  holes  with  diameter  of 
0.165’‘ (4.2 mm)  
 The  self-tapping  machine  screw size 
must  be  No.10  (0.190’‘  diameter 
(4.83mm)). 
 This  method  requires  a  minimum 
number  of  threads-per-inch  to 
achieve  an  adequate  electrical 
connection.  For  a  single  screw,  the 
thread pitch  must  be  at  least  32 
threads per inch (TPI). A single screw 
less  than  32  TPI  does  not  provide 
sufficient  thread  contact.  Note:  Self-
tapping  machine  screws  are  also 
called thread cutting screws. 
 
Method  2- Use  a  bolt  and  nut  (see 
Figures 3.1 and 3.3) 
 If  using  this  method,  use  one  of  the 
larger  holes  with  diameter  of 
0.205’‘ (5.2 mm)  
 The bolt and nut size should be No.8 
(0.164’‘  diameter  (4.16  mm)),  or 
No.10    (0.190’‘  diameter  (4.83  mm)) 
or M5 (0.197’‘ diameter (5.0 mm)). 
 Star  washers  must  be  used  to  make 
contact  through  the  anodization  of 
the module for this method.  
 In  this  case,  the  screw  threads  are 
not  providing  the  electrical  ground 
contact. 
 
Using  lay-in  lug  with  self tapping 
machine screw 
 If  using  this  method,  please  follow 
instructions  in  previous  section 
regarding  using  self-tapping 
machine screws.  
 Use  a  grounding  tin  plated  solid 
copper  lay-in  lug  rated  for  direct 
burial  and  outdoor  use.  Lug  must  be 
used  ILSCO  GBL-4DBT,  Burndy 
CL501TN. 
 The  self-tapping  machine  screw size 
must  be  No.10  (0.190’‘  diameter 
(4.83mm)). 
 This  method  requires  a  minimum 
number  of  threads-per-inch  to 
achieve  an  adequate  electrical 
connection. For self-tapping machine 
screws,  the  thread  pitch  must  be  at 
least  32  threads  per  inch  (TPI).  A 
single  screw  less  than  32  TPI  does 
not provide sufficient thread contact. 
Note:  Self-tapping  machine  screws 
are also called thread cutting screws. 
 As  shown  in  figure  3.4,  attach 
grounding  lug  to  module  frame 
using  a  stainless  steel  self-tapping 
machine screw. 
 Insert  a  stainless  steel  star washer 
between  the  module  frame  and  the 
lug to penetrate frame anodization. 
 Tighten  stainless  steel  set  screw  at 
the  torque  specified  by  lug 
manufacturer to secure copper wire. 
 The specified torque is following 
 Ilsco  Corp.  GBL-4DBT  
10-14AWG-Solid ->  20  in-lbs,  
4-6AWG-Strand ->  35  in-lbs, 
8AWG-Strand ->  25  in-lbs,  10-
14AWG-Strand -> 20 in-lbs 
 Burndy  L  L  C  CL501TN  14AWG-
Solid ->  35  in-lbs,  
14AWG-Strand ->  35  in-lbs, 
4AWG-Strand -> 45 in-lbs 
 Recommended  torque  value in 
tightening  self-tapping  machine 
screw is 2.3 N.m (20in-lb). 
 
Using a lay-in lug with bolt and nut 
 If  using  this  method,  please  follow 
instructions  in  previous  section 
regarding  using  bolts  and  nuts  with 
larger grounding holes.  
 Use  a  grounding  tin  plated  solid 
copper  lay-in  lug  rated  for  direct 
burial  and  outdoor  use.  Lug  must  be 
used  ILSCO  GBL-4DBT,  Burndy 
CL501TN. 
 Attach  grounding  lug  to  module 
frame using a stainless steel bolt and 
lock-nut as shown in figure 3.5. 
 Tighten  stainless  steel  set  screw  at 
the  torque  specified  by  lug 
manufacturer to secure copper wire. 
 Recommended  torque  value in 
tightening  bolt  and  nut is  2.3  N.m 
(20in-lb). 
 
Using a Grounding Clip with self- tapping 
machine screw 
 Use Tyco  Electronics  1954381-1  as 
grounding clip.                                 
 As  shown  in  figure  3.6,  place  the 
grounding  clip  onto  the  module 
frame. 
 Thread  the  screw  into  the  hole  until 
the  head  is  flush  with  the  base  and 
base  is  flush  with  the  frame,  then 
tighten  the  screw  with  1/4  to  1/2 
turn. 
Recommended  torque value  in 
tightening  self-tapping  machine 
screw is between 2.3 and 2.8 Nm. 
 Insert  the  wire  into  the  wire  slot. 
Press down on both ends of the wire. 
 Manually,  or  using  channel  lock 
pliers,  push  the  slider  over  the  base 
until  it  covers  the  base.  This  will 
terminate the wire. 
 For  more  information,  please  refer 
to  Instruction  sheet  issued  by  Tyco 
Electronics. 
 
Using a Grounding Clip with bolt and nut 
 Use Tyco  Electronics  1954381-2  as 
grounding clip. 
 As  shown  in  figure  3.7,  place  the 
grounding  clip  onto  the  module 
frame. 
 Thread  the  hex  nut  onto  the end  of 
the  screw,  then  using  a  3/8-in. 
wrench,  tighten  the  nut. 
Recommended  torque value  in 
tightening  bolt  and  nut is  between 
1.7 and 2.2 Nm. 
 Insert  the  wire  into  the  wire  slot. 
Press down on both ends of the wire. 
 Manually,  or  using  channel  lock 
pliers, push  the  slider  over  the  base 
until  it  covers  the  base.  This  will 
terminate the wire. 
 For  more  information,  please  refer 
to  Instruction  sheet  issued  by  Tyco 
Electronics. 
 
  
						

							 
 
8 
 
Module Terminations 
A junction box as a terminal enclosure is 
equipped for electrical connections.   
VBHNxxxSA11 and VBHNxxxSA11B 
Modules  are  equipped  with MCTM plugs 
as  a  terminal  enclosure. Use  these  MCTM 
plugs for  electrical  connections (see 
Figure 4.1).   
 
Junction Box and Terminals 
 Modules  are  equipped  with  one 
junction box containing terminals for 
both,  positive  and  negative  polarity, 
and bypass diodes. 
 Each  terminal  is  dedicated  to  one  
polarity  with  the  polarity  symbols 
engraved  onto  the  body  of  the 
junction box (see Figure 4.2). 
 Each  terminal  is  provided  with 
factory  installed  lead  cables  and  a 
latching  connector  for  series  and 
string  connections.  Always  use  these 
connectors  and  do  not  detach  them 
from cables. 
 Latching  connectors  are  type  IV  and 
made  by  Multi-Contact.  Supplied 
connectors listed by UL. 
 In  order  to  comply  with  NEC  2008,  a 
locking  sleeve  needs  to  be  used  with 
all connectors that are exposed. 
 The locking sleeve (PV-SSH4) is made 
by  Multi-Contact  and  can  only  be 
released  with  a  special  tool  also 
made  by  Multicontact  (PV-MS). 
Locking  sleeves  are  not  supplied 
with  modules and  must  be 
purchased separately. 
 
Conduit 
 In  applications  where  wire  raceways 
or  conduit  are  used,  follow  the 
applicable  codes  for  outdoor 
installations..  
 Verify  that  all  fittings  are  properly 
installed  to  protect  wires  against 
damage  and  prevent  moisture 
intrusion.  
 
DIODES 
Bypass Diodes 
 When  modules  in  series  strings  are 
partially  shaded,  it  may  cause 
reverse  voltage  across  cells  or 
modules,  because  the  current  from 
other  cells  in  the  same  series  is 
forced  to  flow  through  the  shaded 
area.  This  may  cause undesirable 
heating to occur.  
 The  use  of  a  diode  to  bypass  the 
shaded  area  can  minimize  both 
heating and array current reduction. 
 Modules  are  equipped  with  factory 
installed  bypass  diodes.  The  factory-
installed  diodes  provide  proper 
circuit  protection  for  the  systems 
within  the  specified  system  voltage, 
so  that  you  do  not  need  any  other 
additional bypass diodes.  
 Contact  your Panasonic Authorized 
Representative  for  proper  diode 
type,  if  it  is  necessary  to  add  or 
change  diodes  due  to  system 
specifications. 
 
MAINTENANCE 
 Some  maintenance  is  recommended 
to  maintain  optimal  output 
performance of the solar modules.  
 If  the  module  surface  becomes  dirty, 
it may reduce output power.  
 It  is  recommended  to  clean  the 
surface  of  the  module  with  water 
and  a  soft  cloth  or  sponge,  twice  or 
more per year.  
 
 
 
 
 A  mild  non-abrasive  detergent  may 
be applied for persistent dirt.   
 It  is  also  recommended  to  inspect 
the  electrical  and  mechanical 
connections annually. 
 If  you  need  electrical  or  mechanical 
inspection  or  maintenance,  it  is 
recommended  to  have  a  licensed 
authorized  professional  carry  out 
the  inspection  or  maintenance  to 
avoid  the  hazards  of  electric  shock 
or injury. 
 
Disclaimer of Liability 
 Panasonic does  not  assume 
responsibility  and  expressly  disclaims 
liability  for  loss,  damage,  or  expense 
arising  out  of,  or  in  any  way 
connected  with  installation, 
operation,  use,  or  maintenance  by 
using this manual.   
 Panasonic assumes  no  responsibility 
for  any  infringement  of  patents  or 
other  rights  of  third  parties,  which 
may result from use of modules.  
 No  license  is  granted  by  implication 
or under any patent or patent rights. 
The  information  in  this  manual  is 
believed  to  be  reliable,  but  does  not 
constitute  an  expressed  and/or 
implied warranty.  
 The  return  of  any  modules  will  not 
be  accepted  by Panasonic unless 
prior  written  authorization  has  been 
given by Panasonic. 
 As  part  of Panasonic’s  policy  of 
continuous  improvement, Panasonic 
reserves  the  right  to  change  product 
specifications  at  any  time  without 
prior notice.  
 
Customer Services 
 For  further  information,  please  visit 
http://panasonic.net/energy/solar/ 
or  contact  your Panasonic 
Authorized Representative. 
Figure 4.2  Junction Box  
Cable 
Negative ( - ) Positive ( + ) 
Figure 4.1 Connectors 
Option:  Safety  lock clip 
Connector MC TM Plug 
Cable 
Negative ( - ) Positive ( + )    
						

							 
 
9 
 
 
 
 
 
 
 
 
 
 
Cup washer (Terminal cup) 
(Stainless steel or *brass) 
Figure 3.2 (Method 1) 
Grounding method  
using self-tapping machine screw 
 
Note:  Use  the smaller ground 
holes illustrated in Figure 3.1. 
Frame (Longer side) 
Ground wire (#12AWG) 
(wound  around  the 
screw) Flat washer (Stainless steel) 
Spring washer (Stainless steel) 
Self-tapping  machine  screw 
(Stainless steel) 
  #10-32  
Grounding hole  
(0.165’‘ diameter (4.2 mm) ) 
Glas2 
Length  
(not less than 0.47’‘(12 mm)  
not more than 0.78’‘(20 mm))  
Backshee3 
*Flat  washer  (Stainless 
steel) 
 
*If  using  a  brass  cup  washer,  a 
flat  washer  must  be  inserted 
between  the  cup  washer  and 
module  frame,  and  the  flat 
washer  diameter  must  be  greater 
than the cup washer diameter. 
 
*If  using  a  brass  cup  washer,  a 
flat  washer  must  be  inserted 
between  the  cup  washer  and 
module  frame,  and  the  flat 
washer diameter must be greater 
than the cup washer diameter. 
Cup washer (Terminal cup) 
(Stainless steel or *brass) 
Star washer (Stainless steel) 
Flat washer (Stainless steel) 
Flat washer (Stainless steel) 
Spring washer (Stainless steel) 
Bolt (Stainless steel) 
  #8, #10, M5 
Grounding hole 
 0.205’‘ diameter 
  (5.2 mm)) 
Length  
(not less than 0.63’‘(16 mm)  
 not more than 0.78’‘(20 mm))  
Frame (Longer side) 
Nut (Stainless steel) 
Figure 3.3 (Method 2) 
Grounding method  
using bolt and nut  
 
Note:  Use  the larger ground 
holes illustrated in Figure 3.1. 
Ground wire (#12AWG) 
(wound around the bolt) 
Glas2 
Backshee3 
 *Flat washer (Stainless steel)  
						

							 
 
10 
 
Figure 3.4  
Grounding method  
Using self-tapping machine screw 
Note:  Use  the smaller ground  holes 
illustrated in Figure 3.1. 
 
Select  a  grounding  the  following 
lug. 
 ILSCO GBL-4DBT,  
 Burndy CL501TN 
 
Figure 3.5 
Grounding method  
Using bolt and nut 
Note:  Use  the larger ground  holes 
illustrated in Figure 3.1. 
 
 Select  a  grounding  the  following 
lug. 
 ILSCO GBL-4DBT,  
 Burndy CL501TN 
 
Glass 
Backsheet 
Frame (Longer side) 
Grounding hole 
(0.205”  diameter 
(5.2mm)) 
Flat washer (Stainless steel) 
Thickness:  
not  less  than  0.037”  (0.94 
mm) 
Diameter: 
   not  less  than  0.75” 
(19.05 mm) 
Grounding 
Lug Bolt (Stainless steel) 
 #8, #10, M5 
Nut (Stainless steel) 
Copper wire 
Set screw (Stainless screw) 
Star washer (Stainless steel) 
Length  
(not less than 0.63’‘(16 mm)  
 not more than 0.78’‘(20 mm))  
Self-tapping  machine  screw 
(Stainless steel) 
Copper wire 
Frame (Longer side) Glas2 
Backshee3 
Grounding hole 
(0.165”  diameter 
(4.2mm)) Star washer (Stainless steel) 
Thickness: 
 not less than 0.02” (0.51 mm) 
Diameter: 
 not less than 0.4” (10.16 mm) 
Grounding Lug 
Set screw (Stainless screw) 
Length  
(not less than 0.47’‘(12 mm)  
not more than 0.78’‘(20 mm))