NEP BDM-300 Manuel utilisateur

Installation and Operation Manual

BDM-300/400 Microinverter

Modified 04/13/2023 by JMB

Contents

Contents-------------------------------------------------------------------------------------------------------------------------------------------------- 2

COMPANY PROFILE------------------------------------------------------------------------------------------------------------------------------ 4

1. INTRODUCTION------------------------------------------------------------------------------------------------------------------------------- 5

1.1 Prefix-------------------------------------------------------------------------------------------------------------------------------------5

1.2 Standards Compliance---------------------------------------------------------------------------------------------------------------5

1.3 How to Use This Manual------------------------------------------------------------------------------------------------------------ 5

1.4 Label------------------------------------------------------------------------------------------------------------------------------------- 5

2. SAFETY INSTRUCTION------------------------------------------------------------------------------------------------------------------------6

3. FCC COMPLIANCE-----------------------------------------------------------------------------------------------------------------------------7

4. INSTALLATION----------------------------------------------------------------------------------------------------------------------------------8

4.1 Parts Included------------------------------------------------------------------------------------------------------------------------- 8

4.2 Other Parts and Tools Required--------------------------------------------------------------------------------------------------- 8

4.3 Lightning Surge Suppression------------------------------------------------------------------------------------------------------- 9

4.4 Installation Procedure--------------------------------------------------------------------------------------------------------------- 9

4. 5 Install the AC Branch Circuit Junction Box------------------------------------------------------------------------------------10

4.6 Mounting------------------------------------------------------------------------------------------------------------------------------11

4.6.A Attach BDM-300/400 to the Racking--------------------------------------------------------------------------------- 11

4.6.B Attach BDM-300/400 to the Frame------------------------------------------------------------------------------------11

4.7 Connect the BDM-300/400 Wiring Harnesses------------------------------------------------------------------------------- 12

4.8 Ground the System----------------------------------------------------------------------------------------------------------------- 13

4.8A Through Trunk Cable-------------------------------------------------------------------------------------------------------13

4.8.B Through Racking----------------------------------------------------------------------------------------------------------- 13

5. Commissioning-------------------------------------------------------------------------------------------------------------------------------14

5.1 Commissioning Steps---------------------------------------------------------------------------------------------------------------14

5.2 Inverter/RSD Serial Input----------------------------------------------------------------------------------------------------------15

5.2.A Manually on Device------------------------------------------------------------------------------------------------------- 15

5.2.B Using USB Barcode Scanner--------------------------------------------------------------------------------------------- 15

5.2.C Using Web Browser--------------------------------------------------------------------------------------------------------15

5.3 Installer Registration--------------------------------------------------------------------------------------------------------------- 16

5.4 Homeowner Registration----------------------------------------------------------------------------------------------------------17

5.5 Pre-Commissioning Setup---------------------------------------------------------------------------------------------------------17

5.6 Create a Site on NEP Website---------------------------------------------------------------------------------------------------- 17

5.7 Verify and Map Site-----------------------------------------------------------------------------------------------------------------18

6.6 Commission the Gateway and Confirm Site Setup-------------------------------------------------------------------------- 19

6.7 Grant Homeowner Access to Module View (Optional)-------------------------------------------------------------------- 19

7. Operating Instructions--------------------------------------------------------------------------------------------------------------------- 19

Modified 04/13/2023 by JMB

7.1 Status: Standby---------------------------------------------------------------------------------------------------------------------- 19

7.2 Producing Power-------------------------------------------------------------------------------------------------------------------- 19

7.3 Grounding Fault--------------------------------------------------------------------------------------------------------------------- 19

8. TROUBLESHOOTING AND MAINTENANCE-------------------------------------------------------------------------------------------- 20

8.1 LED Indication of Error------------------------------------------------------------------------------------------------------------- 20

8.1.C Error Mode (except for grounding error)-----------------------------------------------------------------------------20

8.1.B NOT communicating with BDG-256, and with no error-----------------------------------------------------------20

8.1.C Grounding Fault------------------------------------------------------------------------------------------------------------ 21

8.2 Troubleshooting An Inoperable BDM-300/400/400------------------------------------------------------------------------ 21

8.3 Disconnecting a BDM-300/400 from the PV Module-----------------------------------------------------------------------21

8.4 Installing a Replacement BDM-300/400---------------------------------------------------------------------------------------21

9. Data Sheets----------------------------------------------------------------------------------------------------------------------------------- 22

9.1 BDM-300------------------------------------------------------------------------------------------------------------------------------ 22

9.2 BDM-400------------------------------------------------------------------------------------------------------------------------------ 23

11. WARRANTY AND PRODUCTION INFORMATION------------------------------------------------------------------------------------ 24

What does this warranty cover and how long does it last?--------------------------------------------------------------------24

What will NEP do?----------------------------------------------------------------------------------------------------------------------- 24

How do you get service?--------------------------------------------------------------------------------------------------------------- 25

What does this warranty not cover?------------------------------------------------------------------------------------------------ 25

Disclaimer Product-----------------------------------------------------------------------------------------------------------------------25

Modified 04/13/2023 by JMB

COMPANY PROFILE

Northern Electric Power Technology Inc. (NEP) is a U.S.-based company with manufacturing and

R&D facilities in Asia. Our mission is to develop cutting-edge clean energy technologies and provide

state-of-the-art solar inverter, rapid shutdown, and monitoring products to our customers.

Our headquarters are located in Tsingtao, a major industrial center and trading port in

northeastern China. Our campus occupies over 18 acres in the Tsingtao Export Processing Zone,

with more than 650,000 square feet of building space. We plan to connect our campus through a

micro smart grid demo community, powered by solar, wind, and micro turbines. In addition to our

headquarters, we have operation offices Pleasonton, USA.

Our founders are well-known experts in the fields of power electronics, automatic control, signal

processing, and communications. Each of our founders has multiple U.S. and world patents in their

specialty areas, and received Ph.D. degrees from top universities in North America. They each have

over 10 years of engineering and management experience in leading U.S. companies.

NEP offers a complete product line of grid-tied solar inverters, including micro inverters ranging

from 180W to 2000W, and industry leading Rapid Shutdown Devices (RSD). Our field deployment

results have demonstrated the high efficiency and reliability of NEP solar inverters.

At NEP, we are committed to developing Clean, Reliable, Affordable, and Efficient products for our

customers worldwide.

Modified 04/13/2023 by JMB

1. INTRODUCTION

1.1 Prefix

We hope that our products will meet your needs for renewable energy. We highly value your feedback regarding our

products and would greatly appreciate any comments you may have.

Thank you for your business, and please do not hesitate to contact us if you have any questions or concerns.

1.2 Standards Compliance

The BDM-300/400 complies with the NEC 2014 and NEC 2017 article 690.12, and CEC 2015 section 64-218.

1.3 How to Use This Manual

This manual provides detailed product information and installation instructions for the BDM-300/400. Please read

through this manual before installation and operation.

WARNING: This indicates a situation where failure to follow instructions may be a safety hazard or cause

equipment malfunction. Use extreme caution and follow

instructions carefully.

1.4 Label

Modified 04/13/2023 by JMB

2. SAFETY INSTRUCTION

WARNING:

PLEASE READ THIS MANUAL BEFORE INSTALLATION. ANY DAMAGE TO THE PRODUCT

DUE TO NOT FOLLOWING THIS MANUAL IS NOT COVERED BY THE WARRANTEE. ALL THE INSTALLATION SHOULD BE

DONE BY CERTIFIED ELECTRICIAN.

IT IS IMPORTANT TO NOTE THAT NOTHING INSIDE THE PRODUCT SHOULD BE MODIFIED, ASIDE FROM THE CABLE

CONNECTORS. ANY MODIFICATION TO THE INTERNAL COMPONENTS OF THE PRODUCT MAY RESULT IN MALFUNCTION

OR DAMAGE, AND MAY ALSO VOID THE PRODUCT'S WARRANTY.

ALL INSTALLATION SHOULD FOLLOW THE LOCAL ELECTRIC CODES.

WARNING:

WHEN THE PHOTOVOLTAIC ARRAY IS EXPOSED TO LIGHT, IT SUPPLIES A DC VOLTAGE TO THE PVG RSD

WARNING:

THIS PHOVOLTAIC RAPIC SHUTDOWN EQUIPMENT (PVRSE) DOES NOT PERFORM ALL OF THE FUNCTIONS OF A

COMPLETE PHOTOVOLTAIC RAPIC SHUTDOWN SYSTEM (PVRSS). THIS PVRSE MUST BE INSTALLED WITH OTHER

EQUIPMENT TO FORM A COMPLETE PVRSS THAT MEETS THE REQUIREMENTS OF NEC (NFPA 70) SECTION 690.12

FOR CONTROLLED CONDUCTORS OUTSIDE THE ARRAY. OTHER EQUIPMENT INSTALLED IN OR ON THIS PV SYSTEM

MAY ADVERSLY AFFECT THE OPERATION OF THE PVRSS. IT IS THE RESPONSIBILITY OF THE INSTALLER TO ENSURE

THAT THE COMPLETED PV SYSTEM MEETS THE RAPIC SHUTDOWN FUNCTIONAL REQUIREMENTS. THIS EQUIPMENT

MUST BE INSTALLED ACCORDING TO THE MANUFACTURER’S INSTALLATION INSTRUCTIONS.

Modified 04/13/2023 by JMB

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 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.

Modified 04/13/2023 by JMB

4. INSTALLATION

Please be aware that the installation of this equipment carries the risk of electric shock. Conductors that are typically

grounded may become ungrounded and energized when a ground fault is detected.

4.1 Design

Microinverter technology greatly simplifies the design process compared to conventional string inverter systems. The

BD-600 allows for the PV modules to be placed with diﬀerent azimuths and orientations to maximize site generation. In

addition to the layout configuration, a successful design needs to take into account two other considerations: branch

circuit sizing and voltage rise calculation.

Layout: A layout map showing the location of each PV module and its corresponding microinverter should be first

constructed. Care should be taken to review the DC lead length of the PV modules to see if additional jumpers are

required to reach the dual DC inputs of the BD-600. Each microinverter comes with a number of peelable serial number

stickers. Remove a pair of stickers and attach them to the corresponding modules on the site map.

Branch Circuit Sizing: Since the BD-600 uses #12 AWG cabling, NEC code specifies 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 Calculation: The addition of daisy chained, current producing microinverters on the AC bus results in a

sequential rise in voltage along the bus, with the highest at the furthest device. Care must be taken that the resulting

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 information on this subject.

4.1 NEP Parts Needed

In addition to the micro inverters, PV modules, racking, and associated hardware, you’ll need the BDM-300/400

installation kit. This kit includes the following items:

●AC trunk cable (one per micro)

●Protective end cap (one per branch circuit)

●Tail cable (one per branch circuit- 16’ long)

●Male connector (optional) Used to make extension cables

●BDG-256 (or BDG-256P3 for 3 phase)

4.2 Additional Parts and Tools Required

In addition to the PV modules, racking, and associated hardware, you’ll need the following parts:

●MLPE rail or frame attach clamps (2 per microinverter)

●AC junction boxes (multiple options possible)

●Cordgrip with locknut or strain relief fitting (one per branch circuit)

●A subpanel may be required for systems with multiple branch circuits

●Cable clips

●Sockets, wrenches, torque wrench, multimeter, small ﬂat head screwdriver, and mirror with extension rod

●Lightning and surge suppressor (recommended)

Modified 04/13/2023 by JMB

4.3 Lightning Surge Suppression

●It's important to note that lightning strikes can cause damage to PV systems even without directly hitting the

equipment or building where the system is installed. The electrical grid can experience voltage spikes induced

by a nearby lightning strike, which can in turn damage the equipment. While the BDM-300/400 includes

integrated surge protection that is greater than that found in most string inverters, it is still possible for the

protection to be exceeded if the surge has sufficient energy, resulting in damage to the equipment.

●Because the NEP Limited Warranty does not cover "acts of God" such as lightning strikes, and given that these

strikes can occur anywhere, it is recommended to install surge protection as part of any solar installation. Any

surge protection devices should be installed in accordance with the vendor's instructions

●

4.4 Installation Procedure

WARNING: : DO NOT CONNECT BDM-300/400 TO THE UTILITY GRID OR ENERGIZE THE AC CIRCUIT(S) UNTIL YOU HAVE COMPLETED

ALL OF THE INSTALLATION PROCEDURES AS DESCRIBED IN THE FOLLOWING SECTIONS.

Installing the BDM-300/400 Micro inverter System involves several key steps:

●Measuring service and installing the AC branch circuit junction box.

WARNING: ONLY USE ELECTRICAL SYSTEM COMPONENTS APPROVED FOR WET LOCATIONS

●Attaching the BDM-300/400 Micro inverter to the racking.

●Connecting the BDM-300/400 Micro inverter wiring harnesses

●.Grounding the system (optional)1

●Completing the BDM-300/400 Micro inverter installation map and connecting the PV modules.

The finished system should be similar as in the diagram. Detailed installation steps are listed in the following

section.

1DC circuits of BDM-300/400 are isolated and insulated from ground. An integrated grounding protection circuit is included in the micro inverter.

Modified 04/13/2023 by JMB

4. 5 Install the AC Branch Circuit Junction Box

●Measure service entrance conductors to confirm AC service at the site. Acceptable ranges are

shown in the table below:

1. BDM-300/400-240A & BDM-300/400-208A (North America)

2. BDM-300/400-AU (Australia and New Zealand)

3. BDM-300/400-EU (Europe)

●Mount the adapter plate onto the PV racking system at a suitable location, usually at the end of a row of

modules.

●Install a junction box with the adapter plate that is compatible with the microinverter.

●Connect the open wire end of the AC interconnect cable to the junction box using a gland or strain relief fitting

that is appropriate for the cable. It is important to use a strain relief connector with a diameter opening of 3/8

inches for the AC interconnect cable.

4.6 Mounting

4.6.A Attach BDM-300/400 to the Racking

●Before mounting the microinverter directly to a module, it is important to mark the approximate centers of

each PV module on the racking system. This will help in evaluating the location of the microinverter with

respect to the PV module junction box or any other obstructions.

WARNING: ALLOW A MINIMUM OF .75 INCHES BETWEEN THE TOP OF THE ROOF AND THE BOTTOM OF BDM-300/400. WE ALSO

RECOMMEND THAT YOU ALLOW .50 INCHES BETWEEN THE BACK OF THE PV MODULE AND THE TOP OF BDM-300/400. DO NOT

MOUNT BDM-300/400 IN A LOCATION THAT ALLOWS LONG-TERM EXPOSURE TO DIRECT SUNLIGHT.

Modified 04/13/2023 by JMB

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