NEP BDM-500 User manual

SAA
152167
l
USA
Address: 2570 N. First Street, Suite 200, San Jose, CA 95131
TEL: [phone]
Japan
Address: 812-0011福岡市博多区博多駅前 3-10-24 藤井ビル 1F
TEL: [phone]
FAX: [phone]
China
Address: No.1 Anhe Rd Tsingtao Export Processing Zone, Tsingtao, China 266113
TEL: [phone]
FAX: [phone]
Email:[e-mail]
Web: hp://www.northernep.com
hp://www.nep-japan.com
hp://www.micro-inverter.jp
Rev. 2017-01-12
Dual Module Macroinverter
BDM-500
Installation and Operation Manual

COMPANY PROFILE
01
1. I NTRODUCTION
02
1.1 Greeting
02
1.2 System Compatibility
02
1.3 How to Use This Manual
02
1.4 Label
02
2. SAFETY INSTRUCTION
03
3. FCC COMPLIANCE
03
4. DESIGN
04
5. PARTS NEEDED
04
5.1 NEP Parts
04
5.2 Additional Parts and Tools Requires
05
5.3 Lightning and Surge Suppression
05
5.4 Shipping Information
05
6. INSTALLATION
05
6.1 Pre-installation
05
6.2 Installation Steps
06
Step 1 - System Layout
06
Step 2 - Connect theWiring Harnesses
07
Step 3 - Install the AC Branch Circuit Junction Box
08
Step 4- Ground the System 08
Step 5 - Complete the Connection Map
09
Step 6 - Connect the PV Modules
09
Step 7 - Install the BDG 256 Monitoring Gateway
09
7. COMMISSIONING 10
8. OPERATING INSTRUCTIONS 10
9. TROUBL ESHOOTING MAINTENANCE 11
10 . SPECIFICATIONS 14
11. WARRANTY AND PRODUCT INFORMATION 16
CONTENTS

0 1
COMPANY PROFILE
Northern Electric & Power Inc. (NEP) is an internaonal supplier of cung-edge clean
energy technologies headquartered in the United States.The company maintains facilies
both here and abroad, including a more than18 acre site in the Tsingtao Export Processing
Zone and has more than 650,000 square feet of building space.
The company’s founders are well-known experts in the elds of power electronics,
automa control, signal processing, and communicaons; each holding mulple U.S. and
world patents in their specialty areas.
NEP has a complete product line of grid-ed solar inverters, including 180W~600W micro
inverters, 1.5kW~5kW single phase solar inverters, 10kW~500kW three-phase solar
inverters, and rapid shutdown devices. Field deployment results demonstrated high system
eency and reliability of NEP solar inverters.
NEP is commied to develop Clean, Reliable, Affordable and Efficient (CARE) products for
worldwide customers to aid in the transion to a green economy.

03
1. INTRODUCTION
1.1 Greeting
Thank you for choosing the BDM-500 micro inverter from NEP. This product will
maximize your inversion benet with the minimal amount of design and
installaon complexity. This document should provide you with all of the
necessary steps to correctly install the NEP-500 dual module micro inverter in
sites located in North America. However, should you have addional quesons
please contact NEP’s technical representave at [e-mail].
1.2 System Compatibility
The BDM-500 is designed to support either one or two 60 or 72 cell modules in
grid-ed PV system consists of PV panels, grid-ed inverter and juncon boxes.
The DC output from the PV panels is converted into AC energy and fedback to the
grid through the BDM-500. The BDM-500 also provides eecve an-islanding
isolaon between the PV module and AC grid output.
1.3 How to Use This Manual
This manual provides detailed product informaon and installaon instrucons
for the BDM-500micro solar inverter. Please read through this manual before
installaon and operaon.
WARNING:This indicates a situaon where failure to follow instrucons
may be a safety hazard or cause equipment malfuncon. Use extreme cauon
and follow instrucons carefully.
1.4 Label
A label is located on the side of the inverter which includes technical data as well
as type and serial number of the device. Safety instrucons are listed and
explained below:
Danger!
The term “danger” describes an issue which, if ignored can cause
personal injury.
Aenon!
With the term “aenon” a circumstance is listed which may
cause property damage if disregarded.
Instrucons for use!
Under “Instrucons for Use“, it is pointed out that installaon and
operang instrucons are to be read and understood before
installaon or repair.
Cauon, hot surface!
Under “Cauon, hot surface”, it should be noted that surfaces of
equipment may be hot and create a burn hazard.
Special disposal instrucons!
With “Note Separate Disposal”, it is pointed out that this product
may not be disposed of with normal garbage. An improperly
conducted disposal can lead to damage to the environment.
ETL Cercaon
This marks ceres that the product complies with all relevant
UL requirements for sale in North America.
2. SAFETY INSTRUCTION
WARNING:
PLEASE READ THIS MANUAL PRIOR TO INSTALLATION. PRODUCT DAMAGE RESULTING FROM FAILURE
TOFOLLOW THIS MANUAL IS NOT COVERED BY THE WARRANTEE.
INSTALLATIONS SHOULD BE DONE ONLY BY CERTIFIED ELECTRICIANS.
NOTHING INSIDE THE INVERTER SHOULD BE MODIFIED
ONLY NEP APPROVED CABLING SHOULD BE USED TO CONNECT MICROINVERTERS
ALL INSTALLATIONS SHOULD FOLLOW THE LOCAL ELECTRICAL CODES. ADDITIONAL PROTECTION FOR THE AC
WIRING FROM THE INVERTERS SHOULD BE PROVIDED AND MAY BE REQUIRED BY LOCAL AND NATIONAL WIRING
REGULATIONS. THIS PROTECTION IS LIKELY TO INCLUDE RESIDUAL CURRENT DEVICES, EARTH FAULT MONITORS
AND CIRCUIT BREAKERS. THIS PRODUCT MAY CAUSE AC CURRENT WITH A DC COMPONENT. IF A RESIDUAL
CURRENT-OPERATED PROTECTIVE DEVICE (RCD) OR A MONITORING DEVICE (RCM) IS USED FOR PROTECTION IN
CASE OF DIRECT OR INDIRECT CONTACT, ONLY AN RCD OR RCM OF TYPE B IS ALLOWED ON THE AC SIDE OF THIS
PRODUCT.
NEVER DISCONNECT THE PV MODULES FROM THE MICRO-INVERTER WITHOUT FIRST ISOLATING THE AC MAINS.
ALL PV AND AC CONNECTORS ARE NOT TO BE DISCONNECTED UNDER LOAD. THE AC BRANCH CIRCUIT BREAKERS
MUST BE FIRST SWITCHED OFF.
PLEASE CONTACT AUTHORIZED SERVICE AGENTS FOR ANY SERVICE WORK.
BDM-500 IS A GRID-TIED SOLAR INVERTER. IT MAY REQUIRE APPROVAL FROM THE LOCAL UTILITY COMPANY
PRIOR TO CONNECTION TO THE POWER GRID.
THE BDM-500 DOES NOT INCLUDE ANY USER SERVICABLE COMPONENTS.
WARNING: THE PV ARRAY SUPPLIES A DC VOLTAGE TO THE MICROINVERTER WHEN EXPOSED TO
LIGHT.
3. FCC COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protecon against harmful interference in a residenal installaon. This equipment generates
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instrucons, may cause harmful interference to radio communicaons. However, there is
no guarantee that interference will not occur in a parular installaon. If this equipment
does cause harmful interference to radio or television recepon, which can be determined by
turning the equipment oand on, the user is encouraged to try to correct the interference by
one or more of the following measures:
●Reorient or relocate the receiving antenna.
●Increase the separaon between the equipment and the receiver.
●Connect the equipment into an outlet on a circuit dierent from that to
which the receiver is connected.
●Consult the dealer or an experienced radio/TV technician for help.
Changes or modiaons not expressly approved by the party responsible for compliance may
void the user’s authority to operate the equipment.
0 2

05
0 4
11111111
4. DESIGN
Microinverter technology greatly simplies the design process compared to
convenonal string inverter systems. The BD-500 allows for the PV modules to be
placed with dierent azimuths and orientaons to maximize site generaon. In
addion to the layout conguraon, a successful design needs to take into account
two other consideraons: branch circuit sizing and voltage rise calculaon.
Layout: Since the BD-500 is a single input device. A layout map showing the
locaon of each PV module and its corresponding microinverter should be rst
constructed. Care should be taken to review the DC lead length of the PV modules
to see if addional jumpers are required to reach the DC input of the BD-500. Each
microinverter comes with a number of peelable serial number skers. Remove a
sker and aach them to the corresponding modules on the site map.
Branch Circuit Sizing: Since the BD-500 uses #12 AWG cabling, NEC code species a
maximum breaker size of 20A. This limits the branch size to a maximum of seven
(7) devices for a 240V system and six (6) devices for a 208V system.
Voltage Rise Calcula�on: The addion of daisy chained, current producing
microinverters on the AC bus results in a sequenal rise in voltage along the bus,
with the highest at the furthest device. Care must be taken that the resulng
voltage doesn’t exceed the maximum permissible by code. For a 240 V system, this
is 264V and 229V for a 208V system. Please contact NEP technical support should
you need more informaon on this subject.
5. PARTS NEEDED
5.1 NEP Parts
You will need the following parts from NEP:
●Microinverters (one per every 2 modules)
●Protecve end cap (one per branch circuit)
●Tail cable (one per branch circuit- 16’ long)
●Male connector (oponal)
Used to make extension cables
●BDG-256 (or BDG-256P3)
5.2 Additional Parts and Tools Required
In addion to the PV modules, racking, and associated hardware, you’ll need the
following parts:
MLPE rail or frame aach clamps (2 per microinverter)
• AC juncon boxes (mulple opons possible)
• Cordgrip with locknut or strain relief ng (one per branch circuit)
• A subpanel may be required for systems with mulple branch circuits
• Cable clips
• Sockets, wrenches, torque wrench, mulmeter, small at head screwdriver,
and mirror with extension rod
• Lightning and surge suppressor (recommended)
5.3 Lightning and Surge Suppression
Since the NEP Limited Warranty does not cover “acts of God”, such as lightning
strikes or grid irregularies, NEP strongly recommends inclusion of a surge
protecon device in all systems. Lightning does not actually need to strike the
equipment or building where PV system is installedto cause damage. Oen, a
strike nearby will induce voltage spikes in the electrical grid that can damage
equipment. Addionally, many areas can experience irregularies in electrical
grid that can generate similar voltage spikes. While the BDM-500 includes
integrated surge protecon circuitry, if the surge has suent energy the
protecon circuitry can be exceeded and the equipment can be damaged.
Installaon of a suitable surge protector signicantly increases the protecon
against such events.
5.4 Shipping Information
The BDM-500 Ships six (6) to a box with each box measuring approximately 18” x
13.5” x 16”and weighing 57 lbs. A typical pallet contains 27 boxes.
6. INSTALLATION
6.1 Pre -installation
Prior to installaon, use the mulmeter to check the electrical panel to conrm
the correct service voltage per the below table. If this voltage is too high it can
prevent proper operaon of the microinverters. If this is the case, the uty
should be noed. However, an NEP technical representave may be able to
adjust microinverter operaonal parameters to accommodate the situaon.
Residenal
L1 to L2
240 Vac
Commercial
L1 to L2 to L3
208 Vac
Also, please check all microinverters and cabling for any potenal damage prior
to site deployment. Remember to rst create and bring a copy of the layout
map.This map should show the physical locaon of each BDM-500and their
associated PV modules in your installaon.
5

07
0 6
Step 2 – Connect the Wiring Harnesses
Each BDM-500 comes with an integrated trunk cable to simplify the AC
connecon process. The AC trunk cable includes a male connector on one end
and a female connector at the other end. Plug the male AC connector of the rst
BDM-500 into the connector on the tail cable. Plug the female AC connector of
the rst BDM-500 into the male connector of the next BDM-500(or jumper cable)
and connue this “daisy chain” process to form a connuous AC branch
circuit.Terminate the nal female connector on the last microinverter in the
branch circuit with the protecve cap. The connectors are keyed with a snap lock
pin. A “click” indicates proper mang. Secure the mated connector pairs and any
excess AC cable to the rail or racking using cable clips or wire es
WARNING: DO NOT EXCEED THE MAXIMUM NUMBER OF SEVEN (7) BDM-500s IN A
240V AC BRANCH CIRCUIT (SIX(6) FOR 208V) AND EACH BDM-500 AC BRANCH CIRCUIT
MUST BE SOURCED FROM A 20A MAXIMUM BREAKER.
Install a protecve end cap on the open female AC connector on the last
microinverter at the endof the truck cable.
WARNING: MAKE SURE PROTECTIVE END CAPS HAVE BEEN INSTALLED ON ALL UNUSED
AC CONNECTORS. UNUSED AC BDM-500 WIRE HARNESS CONNECTORSARE LIVE WHEN
THE SYSTEM IS ENERGIZED.
The AC branch circuit should look as pictured below:
7
6.2 Installation Steps
WARNING: CONNECT BDM-500S TO THE ELECTRICAL UTILITY GRID ONLY AFTER RECEIVING
PRIOR APPROVAL FROM THE UTILITY COMPANYAND LOCAL AHJ.
WARNING: BE AWARE THAT ONLY QUALIFIED PERSONNEL CAN CONNECT BDM-500 TO THE
ELECTRICAL UTILITY GRID.
Step 1 – System Layout
Mark the approximate locaon of each pair of PV modules on the racking system.
Place the microinverters at the locaon called out in the layout map and loosely
aach to the rails using the MLPE clamps. Check the reach of all DC and AC
cabling. DC jumpers may be required for some modules. Reposion as needed.
WARNING: ALLOW A MINIMUM OF 2.75 INCHES BOTH BETWEEN THE TOP OF THE ROOF
AND THE BOTTOM OF THE BDM-500 AND BETWEEN THE BACK OF THE PV MODULE AND
THE TOP OF THE BDM-500. DO NOT PLACE THE BDM-500 IN A LOCATION SUBJECT TO
DIRECT SUNLIGHT.
For ground mount, ballasted, or at roof deployments it may be necessary to
aach the microinverters to the racking frame.
Once the nal posion is conrmed, secure the microinverters using the MLPE
clamps and torque per the manufacturer’s speciaons. Typical values are about
12 lbs (16.3 NM).

09
0 8
Step 3 – Install the AC Branch Circuit Junction Box
1. Install an appropriate juncon box on to the mounng plate.
2. Mount the adapter plate at a suitable locaon on the racking or frame. This
is typically near the end of a row of modules.
3. Feed the open wire end of the tail cable into the juncon box and secure with
an appropriate cord grip or strain relief ng. The AC tail cable requires a
strain relief connector with an opening of 3/8” in diameter.
4. Feed the connecng wires from either the main service panel or subpanel (if
mulple branch circuits are deployed) into the juncon box. This is most likely
via metal conduit.
5. Connect L1, L2 and Ground from the branch circuit to their corresponding
connecons from the electrical panel with wire nuts. NEP recommends the
applying sealant to the inside cavity of the wire nuts. Seal the juncon box.
Step 4– Ground the System
Each BDM-500 has an integrated ground protecon circuit.The grounding wire is
through the trunk cable, and should be securely connected to the ground
connector in the juncon box.
Ground the System Through Racking (Option)
BDM-500 may also be grounded through the racking as shown below.
Step 5– Complete the Connection Map
Each BDM-500 has a removable serial number label located on the mounng plate
as well as addional skers included in the microinverter’s protecve bag.
Remove one and ax it to the corresponding locaon on the layout map. Aer
entering this data, the BDM-256 will create a virtual array from the map you create.
Step6– Connect the PV Modules
Connect all AC all system inter-wiring connecons prior to installing the PV
modules.
1. Mount the PV modules in the posions corresponding to their associated
BDM-500 microinverter. Each BDM-500 comes with two sets of oppositely sexed
DC connectors.
2. Connect the posive DC wire from the rst PV module to the negavely marked
DC connector (male pin)on the BDM-500. Then connect the negave DC wire
from the PV module to thepositively marked DC connector (female socket) of the
BDM-500. Next, do the same for the second set of DC connectors from the
second module. Repeat for all remaining PV modules using one BDM-500 for
each set of modules. If the system contains an odd number of modules, it is
acceptable to connect only one PV module to the BDM-500.
Step 7– Install the Monitoring Gateway
The BDG-256 (or BDG-256P3) is a versae gateway that connects each of the
BDM-500 microinverter to the NEP server via the cloud, allowing for collecon of
producon and other data useful in system monitoring and trouble shoong. It is
easily installed either by plugging into an exisng 120V AC interior outlet or by
hardwiring into the 240V service in a suitable protecve enclosure. Connecng to
240V will maximize the strength of the PLC signal, thereby improving
communicaon. The BDG-256P3 is designed to support commercial three phase
systems and should only be located in a protecve enclosure. The gateway then
will connect to the server via either WiFi or direct Ethernet connecon.
Follow the instrucons in the NEP Gateway BDM-256/256P3 Installaon and
Operaons Manualfor speci details on registering the individual microinverters

11
10
7. COMMISSIONING
WARNING: ENSURE THAT ALL ACAND DC WIRING IS CORRECT. ENSURE THAT NONE OF THE
AC AND DC WIRES ARE PINCHED OR DAMAGED AND THAT ALL JUNCTION BOXES ARE
PROPERLY SEALED CLOSE.
Following these steps to commission the BDM-500 PV system:
1. Turn on the circuit breakers for each of the BDM-500 AC branch circuits.
2. Turn on the main service panel uity-grid AC circuit breaker. Your system will start
producing power aer no more than 5 minutes.
3. The BDM-500 will start to send performance data over the power lines using
power line communicaon (PLC) to the BDG-256. The me required for each
BDM-500 in the system to communicate to the BDG-256 will vary with the number
of microinverters in the system. For a typical residenal system data acquision
should take no more than 20-25 minutes.
8. OPERATING INSTRUCTIONS
The BDM-500 begins operaon only aer suent DC voltage from the PV module
is received. At this point the status LED will start ashing.
Status: standby
The LED light toggles on and oat two (2) second intervals
Red:error detected
Orange: no error, but not yet communicang to the BDG-256
Green: no error, and communicang to the BDG-256
Status: producing power
The LED light toggles on and oat one (1) second intervals
Orange: not communicang to the BDG-256
Green: communicang to the BDG-256
11
Status: grounding fault
The LED light is in solid red color.
In case of a fault, the BDM-500 enters a protecve mode and stops outputng
power. The fault message is usually sent to a connected BDG-256 gateway through
the power line communicaon. The error message is then displayed on the screen
of BDG-256 gateway by a 16-bit error code. The table below shows the codes:
Error code Error
Bit-0 DC over voltage
Bit-1 DC under voltage
Bit-2 hardware error
Bit-3 Inverter over voltage
Bit-4 Frequency over
Bit-5 Frequency under
Bit-6 AC voltage RMS over
Bit-7 AC voltage RMS under
Bit-8 Peak AC voltage over
Bit-9 AC current RMS over
Bit-10 Peak AC current over
Bit-11 Temperature over
Bit-12 ADC error
Bit-13 GFDI fault indicator
Bit-14 Relay fault (BDM-250-AU/BDM-250-EU only)
Bit-15 PLC Communicaon Error
9. TROUBLESHOOTING AND MAINTENANCE
WARNING: DO NOT ATTEMPT TO REPAIR THE BDM-500; IT CONTAINS NO
USER-SERVICEABLE PARTS. IF TROUBLESHOOTING METHODS FAIL, PLEASE CONTACT NEP FOR
FURTHER ASSISTANCE.
WARNING: NEVER DISCONNECT THE DC WIRE CONNECTORS UNDER LOAD. ENSURE THAT
NO CURRENT IS FLOWING IN THE DC WIRES PRIOR TO DISCONNECTING. AN OPAQUE
COVERING MAY BE USED TO COVER THE MODULE PRIOR TO DISCONNECTING.
WARNING: BDM-500 IS POWERED BY DC POWER FROM PV MODULES. MAKE SURE YOU
DISCONNECT THE DC CONNECTIONS AND RECONNECT DC POWER TO WATCH FOR THE TWO
SECONDS LED ON/OFF TOGGLE AFTER DC IS APPLIED.

13
12
2
1
WARNING:
ALWAYS DISCONNECT AC POWER BEFORE DISCONNECTING PV MODULE WIRES
FROM THE BDM-500. THE AC CONNECTOR OF THE FIRST BDM-500 IN A BRANCH CIRCUIT IS
SUITABLE AS A DISCONNECTING MEANS ONCE THE AC BRANCH CIRCUIT BREAKER IN THE
LOADCENTER HAS BEEN OPENED.
LED indication of error
•error mode (except for grounding error)
The LED light ashes in red color.
•NOT communicating with BDG-256, and with no error
The LED light ashes in orangecolor.
•grounding fault
The LED light is in solid red color.
Troubleshooting an inoperable BDM -500
To troubleshoot an inoperable BDM-500, follow the steps in the order shown:
1. Check the connecon to the uty grid. Verify that the uty voltage and
frequency are within allowable ranges shown in the label of BDM-500.
2. Verify uty power is present at the inverter in queson by removing AC, then DC
power. Never disconnect the DC wires while the BDM-500 is producing power.
Re-connect the DC module connectors, and then watch for the LED blinks.
3. Check the AC branch circuit interconnecon harness between all the BDM-500.
Verify that each inverter is energized by the uity grid as described in the
previous step.
4. Make sure that any AC disconnects are funconing properly and are closed.
5. Verify the PV module DC voltage is within the allowable range shown in the label
of BDM-500.
6. Check the DC connecons between the BDM-500 and the PV module.
7. PLC signal quality may be checked through the interface on the BDG-256 gateway.
If the PLC signal is weak, it might be due to the distance between the micro
inverters and the gateway. It may also be caused by the interference from other
electronic devices.In most cases, signal quality may be signiantly improved by
moving the BDG-256 to closer to the micro inverter arrays, and/or farther away
from other interferers. In some cases, a signal ter (LCF) may be installed to
reduce the interference to PLC communicaon. If there are two or more
separate BDM systems close by, it is highly recommended to install LCF for each
micro inverter system to block interference from adjacent other systems.
7. If the problem persists, please call customer support at NEP.
WARNING: DO NOT ATTEMPT TO REPAIR THE BDM-500; IT CONTAINS NO
USER-SERVICEABLE PARTS. IF TROUBLESHOOTING METHODS FAIL, PLEASE RETURN THE
BDM-500 TO YOUR DISTRIBUTOR FOR MAINTENANCE.
Disconnecting a BDM-500 from the PV Module
To ensure the BDM-500 is not disconnected from the PV modules under load,
adhere to the following disconnecon steps in the order shown:
1. Disconnect the AC by opening the branch circuit breaker.
2. Disconnect the rst AC connector in the branch circuit.
3. Cover the module with an opaque cover.
4. Using a DC current probe, verify there is no current owing in the DC wires
between the PV module and the BDM-500.
5. Care should be taken when measuring DC currents, most clamp-on meters
must be zeroed rst and tend to driwith me.
6. Disconnect the PV module DC wire connectors from the BDM-500.
7. Remove the BDM-500 from the PV array racking.
Installing a replacement BDM -500
1. Aach the replacement BDM-500 to the PV module racking using hardware
recommended by your module racking vendor in the same locaon as the one
previously removed.
2. Connect the AC cable of the replacement BDM-500 and the neighboring
BDM-500s to complete the branch circuit connecons.
3. Obtain serial number of the replacement BDM-500
Each BDM-500 has a removable serial number located on the mounng
plate and addional skers in the shipping bag.
4. Reconnect the PV Modules.
First connect the posive DC wire from the PV module to the negavely marked
DC connector (male pin) of the BDM-500. Then connect the negave DC wire
from the PV module to theposively marked DC connector (female socket) of the
BDM-500. Repeat for the remaining PV modules.
5. Replace the old PLC ID in the BDG-256 gateway with the new PLC ID of the
newly installed micro inverter.

15
14
10. SPECIFICATIONS *per IEEE1547A
MODEL BDM-500-240A BDM-500-208A BDM-500
INPUT(DC)
Max Recommended PV Power(Wp) 750 750 750
Max DC Open Circuit Voltage(Vdc) 60 60 60
Max DC Input Current (Adc) 25 25 25
MPPT Tracking Accuracy >99.5% >99.5% >99.5%
MPPT Tracking Range(Vdc) 22-55 22-55 22-55
OUTPUT(AC)
Peak AC Output Power(Wac) 550 550 550
Rated AC Output Power(Wac) 500 500 500
Nominal Power Grid Voltage(Vac) 208 240 230
Allowable Power Grid Voltage(Vac)
183-228 (Adjustable
*
)
211-264 (Adjustable
*
)
180-264 (Adjustable)
Allowable Power Grid Frequency(Hz)
59.3-60.5(Adjustable
*
)
59.3-60.5(Adjustable
*
)
45.5-54.5 (Adjustable)
THD
<3% (at rated power)
<3% (at rated power)
<3% (at rated power)
Power Factor
>0.99 (at rated power)
>0.99 (at rated power)
>0.99 (at rated power)
SYSTEM
EFFICIENCY
CEC Eciency 95.5% 95.5% 95.5%
Night Time Tire Loss(W) 0.11 0.11 0.11
PROTECTION
FUNCTIONS
Over/Under Voltage Protecon Yes Yes Yes
Over/Under Frequency Protecon Yes Yes Yes
An-Islanding Protecon Yes Yes Yes
Over Current Protecon Yes Yes Yes
ReverseDC Polarity Protecon Yes Yes Yes
Overload Protecon Yes Yes Yes
GroundFault Detecon Integrated Integrated Integrated
Protecon Degree NEMA-6 NEMA-6 NEMA-6
Environment Temperature -40
℃
~+65
℃
-40
℃
~+65
℃
-40
℃
~+65
℃
Operang Temperature -40
℃
~ +85
℃
-40
℃
~ +85
℃
-40
℃
~ +85
℃
OTHER
PARAMETERS
Display
LED LIGHT
LED LIGHT
LED LIGHT
Communicaons POWERLINE POWERLINE POWERLINE
Dimension (D-W-H mm) 277*132*50 277*132*50 277*132*50
Weight(Kg) 2.9 2.9 2.9

17
16
7
11 .WARRANTY AND PRODUCT INFOR MATION
What does this warranty cover and how long does it last?
This Limited Warranty is provided by Northern Electric & Power Co. Ltd (NEP) and covers
defects in workmanship and materials in your BDM-500 Grid-Tied Inverter. This Warranty
Period lasts for 10 years from the date of purchase at the point of sale to you, the original
end user customer, unless otherwise agreed in wring. You will be required to demonstrate
proof of purchase to make warranty claims.
This Limited Warranty is transferable to subsequent owners but only for the unexpired
poron of the Warranty Period. Subsequent owners also require original proof of purchase
as described in "What proof of purchase is required?"
What will NEP do?
During the Warranty Period, NEP will, at its opon, repair the product (if economically
feasible) or replace the defecve product free of charge, provided that you nofy NEP of the
product defect within the Warranty Period, and provided that NEP through inspecon
establishes the existence of such a defect and that it is covered by this Limited Warranty.
NEP will, at its opon, use new and/or recondioned parts in performing warranty repair and
building replacement products. NEP reserves the right to use parts or products of original or
improved design in the repair or replacement. NEP repairs or replaces a product, its warranty
connues for the remaining poron of the original Warranty Period or 90 days from the date
of the return shipment to the customer, whichever is greater. All replaced products and all
parts removed from repaired products become the property of NEP.
How do you get service?
If your product requires troubleshoong or warranty service, contact your merchant. If you are
unable to contact your merchant, or the merchant is unable to provide service, contact NEP
directly at:
Northern Electric & Power Inc
Email：supp[email protected]
What does this warranty not cover?
Claims are limited to repair and replacement or if in NEP's discreon that is not possible,
reimbursement up to the purchase price paid for the product. NEP will be liable to you only
for direct damages suered by you and only up to a maximum amount equal to the
purchase price of the product.
This Limited Warranty does not warrant uninterrupted or error-free operaon of the
product or cover normal wear and tear of the product or costs related to the removal,
installaon, or troubleshoong of the customer's electrical systems. This warranty
does not apply to and NEP will not be responsible for any defect in ordamage to: a) the
product if it has been misused, neglected, improperlyinstalled,physically damaged or
altered, either internally or externally, or damaged from improper use or use in an
unsuitable environment; b) the product if it has been subjected to re, water,
generalized corrosion, biological infestaons, or input voltage that creates operang
condions beyond the maximum or minimum limits listed in the NEP product
speciaons including high input voltage from generators and lightning strikes; c) the
product if repairs have been done to it other than by NEP or its authorized service
centers (hereaer "ASCs"); d) the product if it is used as a component part of a product
expressly warranted by another manufacturer; e) the product if its original idenaon
(trade-mark, serial number) markings have been defaced, altered, or removed; f) the
product if it is located outside of the country where it was purchased; and g) any
consequenal losses that are aributable to the product losing power whether by
product malfuncon, installaon error or misuse.
Disclaimer Product
THIS LIMITED WARRANTY IS THE SOLE AND EXCLUSIVE WARRANTY PROVIDED BY NEP IN CONNECTION
WITH YOUR NEP PRODUCT AND IS, WHERE PERMITTED BY LAW, IN LIEU OF ALL OTHER WARRANTIES,
CONDITIONS, GUARANTEES, REPRESENTATIONS, OBLIGATIONS AND LIABILITIES, EXPRESS OR IMPLIED,
STATUTORY OR OTHERWISE IN CONNECTION WITH THE PRODUCT, HOWEVER ARISING (WHETHER BY
CONTRACT, TORT, NEGLIGENCE, PRINCIPLES OF MANUFACTURER'S LIABILITY, OPERATION OF LAW,
CONDUCT, STATEMENT OR OTHERWISE), INCLUDING WITHOUT RESTRICTION ANY IMPLIED
WARRANTY OR CONDITION OF QUALITY, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TO THE
EXTENT REQUIRED UNDER APPLICABLE LAW TO APPLY TO THE PRODUCT SHALL BE LIMITED IN
DURATION TO THE PERIOD STIPULATED UNDER THIS LIMITED WARRANTY.
IN NO EVENT WILL NEP BE LIABLE FOR: (a) ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES, INCLUDING LOST PROFITS, LOST REVENUES, FAILURE TO REALIZE EXPECTED SAVINGS, OR
OTHER COMMERCIAL OR ECONOMIC LOSSES OF ANY KIND, EVEN IF NEP HAS BEEN ADVISED, OR HAD
REASON TO KNOW, OF THE POSSIBILITY OF SUCH DAMAGE, (b) ANY LIABILITY ARISING IN TORT,
WHETHER OR NOT ARISING OUT OF NEP'S NEGLIGENCE, AND ALL LOSSES OR DAMAGES TO ANY
PROPERTY OR FOR ANY PERSONAL INJURY OR ECONOMIC LOSS OR DAMAGE CAUSED BY THE
CONNECTION OF A PRODUCT TO ANY OTHER DEVICE OR SYSTEM, AND (c) ANY DAMAGE OR INJURY
ARISING FROM OR AS A RESULT OF MISUSE OR ABUSE, OR THE INCORRECT INSTALLATION,
INTEGRATION OR OPERATION OF THE PRODUCT.
IF YOU ARE A CONSUMER (RATHER THAN A PURCHASER OF THE PRODUCT IN THE COURSE OF A BUSINESS)
AND PURCHASED THE PRODUCT IN A MEMBER STATE OF THE EUROPEAN UNION, THIS LIMITED
WARRANTY SHALL BE SUBJECT TO YOUR STATUTORY RIGHTS ASA CONSUMER UNDER THE EUROPEAN
UNION PRODUCT WARRANTY DIRECTIVE 1999/44/EC AND AS SUCH DIRECTIVE HAS BEEN IMPLEMENTED
IN THE EUROPEAN UNION MEMBER STATE WHERE YOU PURCHASED THE PRODUCT. FURTHER, WHILE
THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, YOU MAY HAVE OTHER RIGHTS WHICH MAY
VARY FROM EU MEMBERSTATE TO EU MEMBERSTATE OR, IF YOU DID NOT PURCHASE THE PRODUCT IN
AN EU MEMBER STATE, IN THE COUNTRY YOU PURCHASED THE PRODUCT WHICH MAY VARY FROM
COUNTRY TO COUNTRY AND JURISDICTION TO JURISDICTION.

19
Warranty Card
Customer Informa�on
Name:
Address:
City: State: Zip Code:
Tel: Fax: E-mail:
System Informa�on
Fault Product(s) Serial Numbers:
System Commissioning Date: Product Models:
No. of Products Used: Bill of Lading Date:
Fault Product(s) Quanes: Fault Time/Date:
Fault Message(s) or Code(s):
Brief Fault Descripon and Photos (monitoring gateway is required for vercaon):
Installa�on Informa�on
Modules Used:
Modules Quany: Inverters quany per string:
Installaon Company Name:
Installer Name:
For the informaon on our warranty terms and condons,
please see our website: www.northernep.com/en
All elds must be completed in order to process claim.
Customer Signature: Date:
*All rights reserved by NEP. This informaon is subject to changes without noce.

USA
Address: 2570 N. First Street, Suite 200, San Jose, CA 95131
TEL: [phone]
Japan
Address: 812-0011 福岡市博多区博多駅前 3-10-24 藤井ビル 1F
TEL: [phone]
FAX: [phone]
China
Address: No.1 Anhe Rd Tsingtao Export Processing Zone, Tsingtao, China 266113
TEL: [phone]
FAX: [phone]
Email: [email protected]
Web: hp://www.northernep.com
hp://www.nep-japan.com
hp://www.micro-inverter.jp