NORTHERN ELECTRIC BDM-2000 Instruction Manual

BDM-2000
Installation User Manual
V2.0 rev.2023.2.10
Manufacturer
Suzhou Northern Electric Power Technology Co.,Ltd
Kangzhen Building, No. 18, Louyang Road, Suzhou Industrial Park,P.R.China
Email: [e-mail]
[e-mail]
Web: https://eu.northernep.com

DISCLAIMERS
The information in these documents is the property of Northern Electric Power Co., Ltd., hereafter
referred to as NEP.
No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form
or by any means, mechanical, electronic, photographic, magnetic or otherwise, without the prior
written permission of NEP. Internal reproduction used solely for the purpose of product evaluation or
other proper use is allowed and does not require prior approval.
NEP makes no representations or warranties, express or implied, with respect to this documentation
or any of the equipment and/or software it may describe, including without limiting the generality of
the foregoing, to any implied warranties of utility, merchantability, or fitness of any particular
purpose. All such representations or warranties are expressly disclaimed. Neither NEP nor its
distributors or dealers shall be liable for any indirect, incidental, or consequential damages under any
circumstances.
The exclusion of implied warranties may not apply in all cases under some statutes, and thus the
above exclusion may not apply.
This document and the material furnished within is believed to be complete, accurate and up-to-date.
Readers are cautioned, however, that product improvements and field usage experience may cause
NEP to make changes to specifications and contents without prior notice, or per contract provisions in
those cases where a supply agreement requires advance notice. NEP assumes no responsibility for
the use of this material, and no responsibility for any damages, including indirect, incidental or
consequential damages, caused by reliance on the material presented, including, but not limited to,
omissions, typographical errors, arithmetical errors or listing errors in the content material.
Specifications and contents in these documents are continually reviewed, and subject to change
without prior notice where necessary. However, discrepancies cannot be excluded. No guarantee is
made for the completeness of these documents.
NEP WARRANTY
You can download the latest warranty terms and conditions from website at northernep.com.
For technical problems concerning NEP products and requiring assistance, please refer to CONTACT.
Trademarks
All trademarks, including company, brand products and service names, are recognized, even if not
explicitly identified as such. Missing designations do not mean that a product or brand is not a
registered trademark.

INFORMATION ON THIS DOCUMENT
Target Group
This document is intended for “Qualified Persons" and "End Users".
Tasks marked with a warning symbol and the caption “Qualified Persons”require associated skills to
avoid and deal with the dangers and risks in installing and using the product and tools described in
this document.
Tasks not marked do not require particular qualifications and skill sets, and therefore can be
performed by end users.
Qualified Persons
Qualified Persons required
Qualified persons are required to be familiar, understand and capable of following all applicable
regulations, directives and laws, and are aware of the potential risks to perform the activities marked
in this document.
The following knowledge and skills are required for qualified persons:
Knowledge of how an inverter works and is operated
Knowledge of all applicable standards and directives, including country-specific grid conditions
and regulatory guidelines
Knowledge and training of how to minimize and deal with dangers and risks associated with
using, installing, and repairing electrical devices and installations
Knowledge and training in the installation and commissioning of electrical devices, especially
those associated with PV systems
Knowledge and training of and compliance with this document and all safety information
Knowledge of warranty terms and conditions associated with the product described in this
document
"Qualified Person" means he/she is validly licensed from the local authority in:
Safely and properly installing electrical equipment and PV power systems
Safely and properly applying all applicable installation codes in practice

Properly analyzing and minimizing the hazards in performing electrical work and finished
works for all persons and properties involved
Properly selecting and using Personal Protective Equipment (PPE)
End Users
End users can be referred to any who intend to use the product described in these documents, and
must avoid performing tasks marked in this document with requirement for qualified persons.
End users should use this document for a comprehensive understanding of general features and
functions involved in the product, and as a guideline for performing tasks that do not require
particular qualifications independently.
DO NOT put this product in use unless it has been successfully installed and commissioned by a
qualified person following described requirements and steps in the section of Installation and
Commissioning as well as all applicable laws and safety regulations.
Content and Structure
This document describes the unpacking, mounting, installation, commissioning, startup, operation,
troubleshooting, maintenance, as well as the disconnection of the produc. Applicable inverter models
are listed below:
BDM-2000
This document, as well as any data, images and illustrations included herein, are reduced to the
essential information for the user’s guidance, and therefore deviate from the real product. Update of
this document may not be announced.
For the latest version of this document and further information on the described product, please visit
website at northernep.com.
For technical problems concerning the products in this document and requiring assistance, please
refer to CONTACT.
Copyright © 2021 Northern Electric Power Co,. Ltd.. All rights reserved.
Warning Messages
The following warning messages are used in this document, and should be familiarized before
installation or operation of the product.
Failure to follow may result in injury, damage to properties, or a fatal event.

DANGER denotes a hazardous situation which, if not avoided, will result in death or severe
injury.
WARNING denotes a hazardous situation which, if not avoided, can result in death or severe or
moderate injury.
CAUTION denotes a hazardous situation which, if not avoided, can result in moderate or minor
injury.
NOTICE denotes a situation which, if not avoided, that can result in property damage

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 protection
against harmful interference in a residential installation. This equipment generates uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
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 separation between the equipment and the receiver.
● Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
● Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications not expressly approved by the party responsible for compliance may void
the user’s authority to operate the equipment.
SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
Users of these documents are cautioned to familiarize themselves with safety instructions contained
in this section and observe at all time when working.
Users are reminded that all electrical or electronic devices come with residual risks despite
compliance with international safety requirements and careful construction. To prevent injury and
property damage, and to ensure long-term operation of the product, please adhere to all applicable
safety instructions in handling and usage of the product.
Danger to life due to electrical shock when live components are touched in opened
product
High voltages and energies are present in live components and cables inside the product during
operation, e.g. capacitors, connectors. Touching live components and cables may result in death
or severe injuries due to electric shock.
DO NOT open the product.
DO NOT touch live components.

Danger to life due to electrical shock when live DC cables or components are touched
High DC voltages are present in the DC cables when PV modules are exposed to light. Touching
live DC cables or components may result in death or severe injuries due to electric shock.
DO NOT touch non-insulated parts or cables.
DO NOT touch live components when voltage sources are still connected or just
disconnected.
DO NOT connect DC connectors to the product under load.
Personal protective equipment MUST be worn suitably and properly for all work on the
product and the system.
Voltage sources MUST be disconnected from the product before all work.
Danger to life due to electrical shock in case of over-voltages and missing surge
protections
Over-voltages may conduct into other properties (e.g. electrical network of the building,
connected devices via network cables or data cables) in the event of a flash or lightning strike
when there is no surge protection integrated in the system. Touching live product, components
and cables may result in death or severe injuries due to electric shock.
Within the same electrical system and network, make sure all devices are integrated in the
range of existing over-voltage protection.
Integrate suitable surge protection to the transition from any cables, products or
conductive component within the system that are laid outdoor to the indoor system.
Danger to life due to electrical shock from touching ungrounded components or from
touching live components in case of a ground fault
Touching ungrounded PV modules, array frame, inverter or live system component, or parts of
the system components that are still live in the event of a ground fault, may result in death or
severe injuries due to electric shock.
PV modules and the array frames, including electrically conductive surfaces, MUST be
connected and grounded in compliance with all applicable regulations.
In the event of a ground fault,

DO NOT touch any parts or frame of the PV array.
DO NOT touch any cables without reliable insulation.
DO NOT connect the product to any strings with ground faults.
Before working on the product, voltage resources MUST be disconnected.
Personal protective equipment MUST be worn suitably and properly for all work.
Risk of Injury from exposure to substances, gases and dusts
In rare cases, damaged electrical components can cause formation of toxic chemicals inside the
inverter, in such presence of substances, gases or dusts. Exposure or inhaling such chemical
may result in poisoning, skin irritation or burns, breathing difficulty and nausea.
Personal protective equipment MUST be worn suitably and properly for all work.
Danger to life due to fire or explosion
In rare cases, operating under fault conditions may generate gas mixture inside any electrical
devices, that can be explosive or inflammable while switching operational state (e.g. switching
the product ON/OFF in a ground fault event). Flying debris from the fire or explosion may result
in death or severe injuries.
DO NOT work the DC Switch on the product in the event of ground fault.
Before working on the product, voltage resources MUST be disconnected and fully de-
energized.
PV arrays MUST be disconnected using a disconnection device instead of bare hands.
AC circuit breaker (if any) MUST be disconnected.
Risk of injury and property damage due to inappropriate modifications or technical
specifications
Modifications or alterations to the product and its connected system are not allowed unless with
written permission of NEP. Unauthorized modifications may cause incompliance with product's
technical requirement (e.g. maximum input voltage or current), that may result in moderate or
minor injuries, and property damages.
Any guarantee and warranty claims in such cases will be voided.

Risk of injury due to hot enclosures
Touching parts of product enclosure that may get hot during operation (e.g. heatsink) and may
result in burn injuries.
DO NOT touch any parts other than the cover lid of the product.
Before working on the product, voltage resources MUST be disconnected, and leave the
product to cool down for 30 minutes.
Risk of injury due to weight of product
Lifting the product incorrectly or dropping in transportation or mounting may result in injuries
like bruises or muscle strains.
Make sure to take the weight of product into account in transportation and lifting, and
proceed carefully.
To avoid muscle strain or injury, please use proper lifting techniques and any necessary
aid/tools.
Personal protective equipment MUST be worn suitably and properly for all work.
Damage to product and property due to wrong output type
The product described in this document is designed to directly tie with and feed power into
public utility power grid. Connecting the product in any other forms of AC output source or
equipment may result in product and property damage.
DO NOT connect AC output of the product to any other sources than the utility grid, which
will otherwise void any guarantees and warranty claims.
Damage to product due to aggressive cleaning agents
For purpose of cleaning, using aggressive chemicals and cleaning agents may cause damage to
the product and components.
Use a wet cloth with clear water to clean the product.

The product must ONLY be connected and operated with PV arrays of protection class II, in
accordance with IEC 61730, application class A. The PV modules must also be compatible with
this product. Power sources other than compatible PV arrays MUST not be connected and
operate with the product.

OVERVIEWING THE PRODUCT
Product Overview
1
AC Output Terminal
2
WiFi Dongle (optional)
3
LED display
4
DC input 1 (+)
5
DC input 1 (-)
6
DC input 2 (-)
7
DC input 2 (+)
8
DC input 3 (+)
9
DC input 3 (-)
10
DC input 4 (-)
11
DC input 4 (+)

Identifying the Product
Serial Number (S/N)
SN is on the sticker which place right bottom corner of the product.
Symbols on the label
INFO denotes information that is important but non safety-relevant for a task or topic.
Label is located on the side of the inverter. The information on the label includes technical data as
well as type and serial number of the device. Safety instructions are listed and explained below:
Danger!
The term “danger” describes an issue which, if ignored can cause personal injury.
Attention!
With the term “attention” a circumstance is listed which may cause property damage if
disregarded.
Instructions for use!
Under “Instructions for Use“, it is pointed out that installation and operating instructions
are to be read and understood before installation or repair.
Caution, hot surface!
Under “Caution, hot surface”, it should be noted that surfaces of equipment may be hot
and create a burn hazard.
Special disposal instructions!
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.
CE mark
The product complies with essential requirements of relevant directives of EU

INSTALLING THE PRODUCT
Safety
Danger to life due to fire or explosion
All electrical devices can cause fires despite careful construction. Flying debris from the fire or
explosion may result in death or severe injuries.
DO NOT install the product in environment with any flammable materials or gases.
DO NOT install the product in environment with any potentially explosive items or gases.
Risk of injury due to weight of product
Lifting the product incorrectly or dropping in transportation or mounting may result in injuries
like bruises or muscle strains.
Make sure to take the weight of product into account in transportation and lifting, and
proceed carefully.
To avoid muscle strain or injury, please use proper lifting techniques and any necessary
aid/tools.
Personal protective equipment MUST be worn suitably and properly for all work.
Risk of injury due to cables routed in wall
Drilling holes on a wall may damage power cables or pipes for gas or water routed inside.
Make sure to take cables or pipes into account before drilling.
Personal protective equipment MUST be worn suitably and properly for all work.
Risk of shortened product lifespan due to inappropriate installation environment
Installing the product in an inappropriate environment may risk shortening its lifespan. To
ensure optimal performance and operation, please:
DO NOT install the product in exposure to direct sunlight.

DO NOT install the product in exposure to rain and snow.
DO NOT install the product in exposure to splash of salt water.
Make sure the installation site meets ventilation requirement of the product.
The pollution degree of the external environment for NEP's inverters is PD3 .
Pollution Degree 3 indicates:
Conductive pollution occurs, or dry, non-conductive pollution occurs which becomes conductive
due to condensation which is expected.
Lightning Surge Suppression
Lightning does not actually need to strike the equipment or building where PV system is
installed to cause damage. Often, a strike nearby will induce voltage spikes in the electrical grid
that can damage equipment. micro inverter has integrated surge protection, greater than most
string inverters. However, if the surge has sufficient energy, the protection built into the micro
inverter can be exceeded, and the equipment can be damaged.
Since the NEP Limited Warranty does not cover “acts of God” such as lightning strikes, and since
lightning strikes can occur anywhere, it is best practice to install surge protection as part of any
solar installation. Installation of surge protection devices should follow vendor instructions.
Parts required
In addition to the micro inverters, PV modules, racking, and associated hardware, you’ll need the
micro inverter installation kit. This kit includes the following items:
Protective end cap Male
Mounting Bracket (adapter plate)
Other Parts and Tools Required
In addition to your PV array and its associated hardware, you will need the following parts:
Junction box
Sockets, wrenches for mounting hardware
Procedure of Mounting

1. Measuring service and installing the AC branch circuit junction box.
ONLY USE ELECTRICAL SYSTEM COMPONENTS APPROVED FOR WET LOCATIONS.
2. Attaching the micro inverter Micro inverter to the racking.
3. Connecting the micro inverter Micro inverter wiring harnesses.
4. Grounding the system (optional).
DC circuits of micro inverter are isolated and insulated from ground. An integrated ground
protection circuit is included in the micro inverter.
5. Completing the micro inverter Micro inverter installation map and connecting the PV modules.
The finished system should be similar as in the diagram.

240 V
ac
L1 to L2
208 V
ac
L1 to L2
230 V
ac
L1 to L2
230 V
ac
L1 to L2
CONNECTING THE PRODUCT
Safety: Electrical Connections
Danger to life due to electric shock
DO NOT touch any live component.
TO prevent risk of electric shock during installation and maintenance, please make sure that the
AC and DC inputs are plugged out. DO NOT stay close to the instruments while there is severe
weather conditions including storm, lightening etc.
AC Connection
STEP 1 - Install the AC Branch Circuit Junction Box
Measure service entrance conductors to confirm AC service at the site. Acceptable ranges are differ
according to local grid parameter, specifics are shown in the table below:
North America
240 Volt AC Single Phase
208 Volt AC Three Phase
Australia and New Zealand
Europe
Mount the adapter plate at a suitable location on the PV racking system (typically at the end of a row
of modules).
Install an appropriate junction box with the adapter plate.
Connect the open wire end of the AC interconnect cable into the junction box using an appropriate
gland or strain relief fitting. The AC interconnect cable requires a strain relief connector with an
opening of 3/8 inches in diameter.

STEP 2 - Attach product to the Racking
Mark the approximate centers of each PV module on the racking system. Evaluate the location of the
micro inverter with respect to the PV module junction box or any other obstructions.
ALLOW A MINIMUM OF .75 INCHES BETWEEN THE TOP OF THE ROOF AND THE BOTTOM OF
micro inverter. WE ALSO RECOMMEND THAT YOU ALLOW .50 INCHES BETWEEN THE BACK OF
THE PV MODULE AND THE TOP OF micro inverter. DO NOT MOUNT micro inverter IN A
LOCATION THAT ALLOWS LONG-TERM EXPOSURE TO DIRECT SUNLIGHT.
Mount one micro inverter at each of these locations using hardware recommended by your module
racking vendor
STEP 3 - Inter-connect Micro inverters into branch
Each product comes with one AC output cable with T-connection connector at the end. Plug the AC
connector of the each product into socket on the Trunk Cable to form a continuous AC branch circuit.
Please check the rating label of the trunk cable for the maximum allowable number of products on
one AC branch circuit.
DO NOT EXCEED THE MAXIMUM NUMBER OF MICRO INVERTERS IN AN AC BRANCH CIRCUIT, AS
DISPLAYED ON THE UNIT-RATING LABEL. For 12AWG trunk cable, EACH AC BRANCH CIRCUIT
MUST BE SOURCED FROM A DEDICATED BRANCH CIRCUIT PROTECTED BY A 20A MAXIMUM
BREAKER.
Install a protective end cap on the open AC connector at the end of the branch.
NEP micro inverters are designed to be able to inter-connect with other NEP micro inverter
models.
MAKE SURE PROTECTIVE END CAPS HAVE BEEN APPLIED ON ALL UNUSED AC CONNECTORS.
MAKE SURE PROTECTIVE END CAPS HAVE BEEN APPLIED ON THE END OF TRUNK CABLE.

STEP 4 –Ground the system
Each product has an integrated ground protection circuit. The grounding wire is through the trunk
cable, and should be securely connected to the ground connector in the junction box.
STEP 5 - Ground the system through racking (option)
BDM-1000 may also be grounded through the racking.
STEP 6 - Complete the connection map and connect the PV
Modules
A connection map is a diagrammatic representation of the physical location of each micro inverter in
your PV installation. The virtual array in NEP micro inverter gateway BDG-256 is created from the map
you create. It will be handy when installing multiple products.
Each product has a removable serial number label located on the mounting plate. Enter this serial
number into the BDG-256, and correspond it to a number in the connection map.
DC Connection
Safety: Connecting DC
Danger to life due to electrical shock when live DC cables or components are touched
High DC voltages are present in the DC cables when PV modules are exposed to light. Touching
live DC cables or components may result in death or severe injuries due to electric shock.
DO NOT touch non-insulated parts or cables.

DO NOT touch live components when voltage sources are still connected or just
disconnected.
DO NOT connect DC connectors to the product under load.
Personal protective equipment MUST be worn suitably and properly for all work on the
product and the system.
Voltage sources MUST be disconnected from the product before all work.
Danger to life due to electrical shock from touching ungrounded components or from
touching live components in case of a ground fault
Touching ungrounded PV modules, array frame, inverter or live system component, or parts of
the system components that are still live in the event of a ground fault, may result in death or
severe injuries due to electric shock.
PV modules and the array frames, including electrically conductive surfaces, MUST be
connected and grounded in compliance with all applicable regulations.
In the event of a ground fault,
DO NOT touch any parts or frame of the PV array.
DO NOT touch any cables without reliable insulation.
DO NOT connect the product to any strings with ground faults.
Before working on the product, voltage resources MUST be disconnected.
Personal protective equipment MUST be worn suitably and properly for all work.
Risk of injury and property damage
In connection of DC cables to the inverter, maximum input current and voltage MUST not
exceed permitted range as stated in Product Parameters.
Any guarantee and warranty claims in such cases will be voided.
Requirements for PV Modules
All PV modules of connected arrays should be of the same type.
All PV modules of connected arrays should be aligned properly and tilted identically.
DO NOT parallel modules in one string of DC input.
In connection of each independent MPPT, PV arrays in parallel connection should have the same
number of modules.
Max. input voltage and current per string

For connection of PV modules to the inverter, all PV modules MUST be fitted with the supplied
DC connectors.
When assembling the DC connectors, cables MUST be equipped with DC connectors of the
correct polarity.
e.g. [ positive ] connection cable to [ positive ] DC connectors, [ negative ] connection cable to
[ negative ] DC connectors.
Before connecting the PV modules to the inverter, the inverter's DC switch MUST be switched
OFF.
The DC input voltage AND DC input current of the PV array MUST never exceed the maximum
input voltage and current of the inverter.
DC Connection Procedure
Completely install all micro inverter and all system inter-wiring connections prior to installing the PV
modules.
1. Mount the PV modules above their corresponding micro inverter. Each micro inverter comes with
two oppositely sexed DC connectors.
2. First connect the positive DC wire from the PV module to the negatively marked DC connector
(male pin) of the micro inverter. Then connect the negative DC wire from the PV module to the
positively marked DC connector (female socket) of the micro inverter. Repeat for all remaining PV
modules using one micro inverter for each module.
Removing DC
Safety: Disconnection
Danger to life due to electrical shock when live components are touched in opened
product