Manufacturer Information
Manufacturer: Qingdao Greenmeadow Trade Co.,Ltd.
Address: Bld.No.35, Airport International Center No.6 ChangchengSouth Road Chengyang District, 266109 Qingdao, P.R. China
Also Located At: Suzhou Northern Electric Power Technology Co., Ltd., Kangzhen Building, No. 18, Louyang Road, Suzhou Industrial Park, P.R.China
Contact:
- E-Mail: support@northernep.com
- Web: https://eu.northernep.com
Certifications: CE [certification mark]
Disclaimers
The information in these documents is the property of Northern Electric Power Co., Ltd. (NEP). No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, without prior written permission from NEP. Internal reproduction for product evaluation is permitted.
NEP makes no warranties, express or implied, regarding the equipment or software described. All such warranties, including those of utility, merchantability, or fitness for a particular purpose, are expressly disclaimed. NEP and its distributors are not liable for any indirect, incidental, or consequential damages.
This document is believed to be complete and accurate. However, NEP may make changes to specifications and contents without prior notice due to product improvements or field experience. NEP assumes no responsibility for the use of this material or any damages resulting from its use.
Warranty terms and conditions can be downloaded from eu.northernep.com. For technical assistance, email support@northernep.com.
All trademarks are recognized, even if not explicitly identified.
Safety Instructions
⚠️ WARNING: BE AWARE THAT INSTALLATION OF THIS EQUIPMENT INCLUDES RISK OF ELECTRIC SHOCK. NORMALLY GROUNDED CONDUCTORS MAY BE UNGROUNDED AND ENERGIZED WHEN A GROUND FAULT IS INDICATED.
1. Lightning Surge Suppression
Lightning strikes nearby can induce voltage spikes in the electrical grid, potentially damaging equipment. NEP inverters feature integrated surge protection, but high-energy surges can still exceed this protection. Since the NEP Limited Warranty does not cover "acts of God" like lightning strikes, it is recommended to install external surge protection as part of any solar installation, following vendor instructions.
2. 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 provide reasonable protection against harmful interference in a residential installation. The equipment generates and can radiate radio frequency energy. If not installed and used per instructions, it may cause harmful interference to radio communications. No guarantee is made that interference will not occur in a particular installation.
If harmful interference to radio or television reception occurs (determined by turning the equipment off and on), users are encouraged to try 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 to an outlet on a circuit different from the receiver's circuit.
- Consult the dealer or an experienced radio/TV technician.
Changes or modifications not expressly approved by the responsible party may void the user's authority to operate the equipment.
Product Overview
The NEP WiFi Microinverter is a compact device designed for solar power systems. Multiple views of the inverter are presented, showing its rectangular form factor, heat sinks, and various connection ports.
Key Components:
| Item | Description |
|---|---|
| 1 | AC Output Cable |
| 2 | WiFi Dongle (optional) |
| 3 | LED display |
| 4 | DC input (+) |
| 5 | DC input (-) |
Installing the Product
Safety
⚠️ WARNING: BE AWARE THAT INSTALLATION OF THIS EQUIPMENT INCLUDES RISK OF ELECTRIC SHOCK. NORMALLY GROUNDED CONDUCTORS MAY BE UNGROUNDED AND ENERGIZED WHEN A GROUND FAULT IS INDICATED.
DO NOT CONNECT inverters TO THE UTILITY GRID OR ENERGIZE THE AC CIRCUIT(S) UNTIL ALL INSTALLATION PROCEDURES ARE COMPLETED.
Preparation
- The PV module(s) should be securely attached to the racking.
- Check if the Microinverter (MI) is intact without missing components.
- An end cable is prepared.
- The end cable is available in three different lengths (5m, 10m, 15m). Contact your distributor for an exchange if the received cable is not suitable for the installation.
Mount the Micro inverter
Mount the MI on the racking or PV module frame. Visuals show the microinverter being attached to solar panel racking systems using mounting brackets.
DC Connection
- Plug the MC4/QC4 terminals into the DC socket on the MI.
- Ensure each PV module is connected to the corresponding DC socket pair. A diagram illustrates PV modules connecting to the microinverter via DC connectors.
AC Connection
Typical Balcony Solution Topology
For Balcony Solution products, the AC output terminals are customized and differ from standard issue products. In a balcony solution, there is only one inverter in the system. Monitoring is achieved via a WiFi connection between the WiFi dongle on the inverter and the home router.
A diagram shows a single microinverter connected to PV modules, with an AC plug and a WiFi dongle connected to a router icon.
AC Bus Topologies
Typical Trunk Cable Topology
This topology involves multiple microinverters connected in series along a main AC trunk cable. The monitoring signal is carried by the AC current. A datalogger unit is depicted connected to a house power system socket, collecting data. An optional Wi-Fi module is shown for wireless communication between the datalogger and the home router.
Typical Daisy Chain AC BUS Topology
This topology shows microinverters connected sequentially via AC bus connectors. Each inverter is linked to its respective PV module(s).
Monitoring Configuration
In the state of DC connected and AC disconnected, the AP mode of the microinverter will be activated. If AC is connected by accident, please unplug both AC and DC to wait for memory clearance of the microinverter.
Find the AP Number
An eight-digit string can be found under the barcode on the sticker. This is the AP Number. A barcode image is shown.
Obtain NEPViewer
Search for NEPViewer in the App Store or Google Play.
* Android users can visit user.nepviewer.com for the latest version APK file.
WiFi configuration
Please scan the Barcode and see 'NEPViewer APP User Guide' for detailed instructions. A QR code is displayed for scanning.
Running Status
The micro inverter powers on when sufficient DC voltage from the module is applied. The status LED begins flashing after sufficient DC power is applied, indicating the micro inverter is live.
LED Explanation
| Flashing per 1 sec | Flashing per 2 sec | Flashing per 4 sec | |
|---|---|---|---|
| WiFi Connected AC connected | WiFi Connected Inverter Standby | WiFi Connected Inverter Working | |
| WiFi not connected AC disconnected | Inverter Alert | Inverter Alert | |
| WiFi not connectedAC connected | WiFi not connected Inverter standby | WiFi not connected Inverter working |
Troubleshooting
In case of fault, the BDM inverter has multiple protective functions and stops output power. The fault message may be sent through WiFi internet connection and can be monitored through NEPViewer (refer to the tech note "Configuring BDM WiFi"). The alert message is a 16-bit code.
| 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 |
Specification
| MODEL | BDM-350 | BDM-400 | BDM-600 | BDM-800 | BDM-1000 | BDM-1600 | BDM-2000 |
|---|---|---|---|---|---|---|---|
| INPUT(AC) | |||||||
| Max Recommended PV Power (W) | 450 | 600 | 450x 2 | 600x2 | 750x2 | 750x4 | 750x4 |
| Max DC Open Circuit Voltage (Vdc) | 60 | 60 | 60 | 60 | 60 | 60 | 60 |
| Max Imp(Adc) | 16 | 18 | 14 x 2 | 17x2 | 18x2 | 18 x 4 | 18x 4 |
| MPPT Tracking Range (Vdc) | 22-55 | 22-55 | 22-55 | 22-55 | 22-55 | 22-55 | 22-55 |
| OUTPUT(AC) | |||||||
| Rated AC Output Power (W) | 350 | 400 | 600 | 800 | 1000 | 1600 | 2000 |
| Rated AC Output Current (Aac) | 1.53 | 1.74 | 2.6 | 3.48 | 4.4 | 6.95 | 8.69 |
| Nominal Power Grid Frequency (Hz) | 50/60 | 50/60 | 50/60 | 50/60 | 50/60 | 50/60 | 50/60 |
| THD (at rated power) | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
| Power Factor | >0.99 (at full load) | >0.99 (at full load) | >0.99 (at full load) | >0.99 (at full load) | >0.99 (at full load) | >0.99 (at full load) | >0.99 (at full load) |
| PROTECTION FUNCTIONS | |||||||
| Protective Class | Ip66/Ip67 | ||||||
| Environment Temperature | -40°C ~ +65°C | ||||||
| WiFi Frequency band | 2.412GHz-2.472GHz | ||||||
| WiFi Transmitting power | 802.11b:+17dBm+1.5dBm(@11Mbps) 802.11g:+15dBm+1.5dBm(@54Mbps) 802.11n:+14dBm1.5dBm(@HT20,MCS7) | ||||||
Company Contact Information
Company: Suzhou Northern Electric Power Technology Co.,Ltd
Address: Lv 10 Kangzhen Building, Louyang Rd 18 SIP, Suzhou, PR China
Email: info@northernep.com
Website: northernep.com
WELCOME-Northern Electric Power technology Inc.
NEP PV plant Administrator
Home - NEP – Northern Electric Power