Meikai ENERGY Meikai N220/N300 Micro-Inverter Installation and Operation Manual Version: 1.0 NOTICE: MKSTAR –N270: Pairs with most 60-cell PV modules MKSTAR –N220/N300: Pairs with most 72-cell PV modules Page 1 Copyright MeiKai ENERGY 2012 REV 1.
Meikai ENERGY Contact Information: Shenzhen Meikai Electronics Stock Co., Ltd Address: Blk B13,Hengfeng Industrial City,Hezhou,Xixiang,Bao’an,Shenzhen,China Tel：+86-0755-86079109 Fax：+86-075586079197 www.meikaienergy.com info@meikai-cn.com Thanks for choosing Meikai N220/N300 Micro-Inverter. For your own safety and to ensure the operation of the equipment, please read this manual carefully before installation and operation. Page 2 Copyright MeiKai ENERGY 2012 REV 1.
Meikai ENERGY All rights reserved: Meikai reserves the right to change the product and the content of this manual without WARNING. Users are recommended to visit the company website www.meikai-cn.com for more information about new products and latest versions of user manuals. Page 3 Copyright MeiKai ENERGY 2012 REV 1.
Meikai ENERGY Table of Contens Table of Contens...................................................................................................................................... 4 Installation and Operation Instructions ................................................................................................ 5 Important Safety Instructions ......................................................................................................... 5 Safety Information.................................
Meikai ENERGY Installation and Operation Instructions Important Safety Instructions This manual contains important instructions for equipment installation and maintenance. For your own safety, please follow the safety instructions during the installation and maintenance. Please pay attention of the following safety symbols: WARNING：This indicates a situation where failure to follow instructions may cause personnel danger or serious hardware failure. Use extreme caution when performing this task.
Meikai ENERGY Meikai Micro-inverter System Meikai Micro-inverter system is the most advanced and simple distribution solar system. This manual contains detailed instructions for installing and operating the Meikai Micro-inverter.
Meikai ENERGY System Monitoring The user just needs to simply connect the power cable to the indoor socket, and the Ethernet network cable to the computer, the Meikai Messenger will upload the whole operating data of the Micro-inverter to the web server. Both current and historical operating data can be accessed through the Megawatt website. The user will also quickly detect if the system is not running properly.
Meikai ENERGY Meikai Micro-inverter Installation Guide Please read the Installation and Operation Manual before installing a Meikai Micro-inverter. WARNING: Perform all electrical installations in accordance with all local electrical codes. WARNING: risk of electricity shock, the grounding line may become live if not grounded properly.
Meikai ENERGY Step 1-Installing the AC branch circuit junction box A、Check and make sure the AC voltage is within the voltage range indicated on the label. B、Mount the Meikai adapter plate at a suitable location on the PV racking system (typically at the end of a branch of modules). C、Connect the open wire end of the AC interconnect cable into the junction box using an appropriate gland or strain relief fitting.
Meikai ENERGY Step 2- Attach Meikai Micro-inverter to the racking A. Determine the location with respect to the PV module junction box or any other obstructions. WARNING: Allow a minimum of 15cm between the top of the roof and the bottom of the Micro-inverter. We also recommend that you allow 5cm between the back of the PV module and the top of the inverter. DO NOT mount the micro-inverter in a location that allows exposure to direct sunlight. B.
Meikai ENERGY Here is the connection method between the branches. A. Connect the male connecter of the first Meikai Micro-inverter in every branch to the AC junction box. B. Plug the AC female connector of the first micro-inverter into the male connector of the next micro-inverter, and so forth, to form a continuous AC branch circuit. NOTE: Check the micro-inverter rating label for the maximum number of micro-inverters allowed on one AC branch circuit. C.
Meikai ENERGY Step 4-Grounding the system NOTE: If you already use grounding washers to ground the micro-inverter to the PV module racking as described in step 1, skip this step. Each Meikai Micro-inverter comes with a ground screw with a diameter of 5mm. Check your local code for grounding conductor sizing requirement. Connect the grounding electrode conductor to the micro-inverter ground screw.
Meikai ENERGY First connect the positive DC wire from the PV module to the negatively marked DC connector (female socket) of the Micro-inverter. Then connect the negative DC wire from the PV module to the positively marked DC connector (male socket) of the Micro-inverter. Repeat for all remaining PV modules using one Micro-inverter for each module.
Meikai ENERGY 2. Switch on the circuit break on each AC branch circuit. 3. Switch on the main AC break on the connect point of the utility grid. Your Meikai micro-inverter will feed power to the utility grid after 2 minutes if all the micro-inverters are correctly connected. The GREEN LED blinks in an interval of 4 seconds indicate the system is in normal operation. 4.
Meikai ENERGY Note: the starting voltage for Meikai micro-inverter is 30V, the Meikai micro-inverter start to operate only after the DC input voltage is 30V or above, the RED LED indicates the Meikai micro-inverter is in normal operation.
Meikai ENERGY Grounding Fault WARNING: Be aware that only qualified personnel should troubleshoot the Micro-inverter. WARNING: DO NOT disconnect the PV module from the Meikai Micro-inverter without disconnecting AC power. WARNING: Never disconnect the DC wire connectors under load. Make sure that no current is flowing in the DC wires prior to disconnecting. WARNING: N220/N300micro-inverter is powered by DC power, when you reconnect the DC wire after disconnect make sure the RED LED is on.
Meikai ENERGY 4. 5. 6. 7. Cover the module with an opaque cover. Using a DC current probe, verify there is no current flowing in the DC wires between the PV module and the Micro-inverter(make sure the current probe works correctly). Disconnect the PV module DC wire connectors from the Micro-inverter. Remove the Micro-inverter from the PV array racking. Replace a Meikai Micro-inverter Replace a Meikai micro-inverter follow the steps in the order shown 1.
Meikai ENERGY Technical Specifications Note: The output voltage and current of the PV module depend upon several factors such as the number, size and temperature of the cell, and is influenced by the intensity of sunlight. The highest voltage of a PV module is output when the cell is at the lowest temperature and circuit is open. The short circuit current must less than or equal to the maximum DC input current of the micro-inverter.
Meikai ENERGY Technical Specifications Item / Model unit min. normal Max. DC Input Data Recommended input power N220 N300 220 300 W MPPT voltage range N220 N300 Max. input DC voltage N220 N300 Starting DC voltage N220 N300 Max. short circuit DC current N220 N300 Max. input DC current N220 N300 V 30 40 V V input point to input point current feedback 55 30 55 A 15 A 10 12 A 0 AC Output Data Max.
Meikai ENERGY Peak inverter efficiency N220 N300 European efficiency N220 N300 Nominal MPP Tracking N220 N300 Total Harmonic Distortion N220 N300 Operating temperature N220 N300 Relative humidity % 95 95 % 94 94 % 99% % ℃ 3 5 -40 65 0 100% Site altitude 2000m Nighttime power consumption N220 N300 mW 20 other features Compatibility Pairs with most 72-cell PV moudles Dimensions(LxWxH) 228mm*136mm*33.7mm Weight 2.
Meikai ENERGY Appendix Page 21 Copyright MeiKai ENERGY 2012 REV 1.
Meikai ENERGY Meikai Micro-inverter Installation Map To Sheet Customer information Array: Orientation: Tilt: Form / Installer information N/S/E/W (circle) Serial No.: 1 2 3 4 5 6 7 A B C D F To Sheet To Sheet E G H I J K L M Version Fax Installation Map To Sheet Page 22 Copyright MeiKai ENERGY 2012 REV 1.
Meikai ENERGY Quick installation Guide Page 23 Copyright MeiKai ENERGY 2012 REV 1.
Meikai ENERGY Page 24 Copyright MeiKai ENERGY 2012 REV 1.
