maysun-1200w-b maysun-600w-b maysun-300w-b b series user manual.pdfdongguan maywah electronics co....

Microinverter

MaySun-1200W-B MaySun-600W-B MaySun-300W-B

Dongguan Maywah Electronics Co. Ltd

Add.：3rd Floor, Shenzhou Science And Technology

Park,No.37 Xingwu Rd., Wusha Community,

Changan Town, Dongguan, Guangdong, China

Tel：86-769-82585619

Fax: 86-769-82585619

© All rights reserved

2

MaySun-1200W-B MaySun-600W-B User Manual

Important Safety Information，Read this First！

This manual contains important instructions to follow during installation and maintenance of the Microinverter. To reduce

the risk of electrical shock, and to ensure the safe installation and operation of the Microinverter, the following safety

symbols appear throughout this document to indicate dangerous conditions and important safety instructions.

Safety Instructions：

Perform all electrical installations in accordance with all local electrical codes.

Be aware that only qualified personnel should install and/or replace Microinverters.

Connect the Microinverter to the electrical utility grid only after receiving prior approval from the utility company，

and only qualified electrical engineer can perform the operation.

Non-professionals do not disassemble or repair the inverter. If the inverter fails, please contact your dealer or

manufacturer.

Before installing or using the Microinverter, please read all instructions and cautionary markings in the technical

description and on the Microinverter system and the PV-array.

Please install the inverter in ventilated place and away from flammable materials.

Do NOT disconnect the PV module from the Microinverter before removing AC power.

The inverter transform solar photovoltaic (PV) DC power into AC power and fed into the power grid. Do not use this

product for other purposes, for any damage and loss resulting from non-intended use, the manufacturer / supplier

disclaims all responsibility.

Warning Sign 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.

Heat Sign Burn hazard, if not follow instruction may be

burned. Use extreme caution and follow instructions

carefully.

Be aware that the body of the Microinverters is the heat sink and can reach

a temperature of 80 ℃ under extreme conditions. To reduce risk of burns,

do not touch.

Please install the inverter where children can not reach to reduce risk of

shock and burns. Minors and mental patients prohibition use of this

products.

3


1. Product description：

1.1 Appearance and instructions

○1 PV input（MC4） ○2 PV input（MC4） ○3 PV input（MC4） ○4 PV input（MC4）

○5 AC input- connect to the previous ○6 AC output-connect to the next ○7 LED display ○8 Item No.

1.2 Product dimension：

MaySun-1200W-B

MaySun-600w-B

① ②

⑤

④

⑥

③

⑦

○8

4


1.3 Product features：

MPPT(maximum power point tracking)，effectively track and lock maximum power output of solar

panels

When the inverter track the maximum power point of the solar panel, it will automatically locked and

with stable output

4 independent MPPT（MPPT）

standard MC4 input port，easy and safe installation

Integration AC output port

Pure sine wave output

anti-islanding protection function：inverter will automatically stop output when the utility grid off or

fault.

Over-temperature protection, short current protection and over-load protection

IP65 waterproof function

Wifi communication(Options)

1.4 System structure drawing

A：solar panel(PV)

B：MaySun Microinverter

C：AC cable

D: AC distribution box

E：home utility

F: low voltage utility grid

Description：Connect 4PCS of solar panel to 1pc of MaySun Microinverter. The inverter use MPPT function to

absorb the maximum energy from solar panels, then use high efficiency inverter conversion to transform the DC

to AC, and then use the synchronous high-frequency modulation and 0 phase offsets technology to achieve

delivery the energy input to the utility grid.

A

B c D

E F

5


1.5 Application design sketch

6


2. MaySun Microinverters Parameters

Input Data(DC) MaySun 1200W-B MaySun 600W-B MaySun 300W-B

Recommend PV modules 300W×4pcs 300W×2pcs 300W×1pcs

Maximum DC input voltage 50V

MPPT voltage range 25-40V

Operation voltage range 22-50V

One way maximum input current 20A

Output Data（AC） MaySun 1200W-B MaySun 600W-B MaySun 300W-B

Peak power output 1200Watt 600Watt 300Watt

Rated output power 1150Watt 540Watt 270Watt

Rated output current @120V:9.58A @230V: 5A @120V:4.8A @230V:2.5A @120V:2.4A @230V:1.25A

Rated voltage range @120V:90-140V @230V:180-260V

Rated frequency range 50Hz/60Hz Auto

Power factor >98%

Maximum unitsper branch @120V:3PCS @230V: 5PCS @120V:6PCS @230V: 10PCS

Max-current per branch 30A

Efficiency MaySun 1200W-B MaySun 600W-B MaySun 300W-B

MPPT efficiency 99.5%

Maximum output efficiency 92%

Night power consumption <70mW Max

Exterior MaySun 1200W-B MaySun 600W-B MaySun 300W-B

Ambient temperature range -40℃ to +60℃

Operation temperature range -40℃ to +82℃

Dimensions (WxHxD) 370mm×305mm×38mm 289mm×200mm×38mm 191×176×38mm

Weight 2.85kg 1.53kg 0.83kg

Waterproof rating IP65

Cooling Natural convection - No fans

Feature MaySun 1200W-B MaySun 600W-B MaySun 300W-B

Communication function Wifi (Options)

Power transmission mode Reverse transfer, load priority

Electromagnetic compatibility EN50081.part1 EN50082.part1

Grid disturbance EN61000-3-2 Safety EN62109

Grid detection DIN VDE 1026 UL1741

Package MaySun 1200W-B MaySun 600W-B MaySun 300W-B

Inner box Dimensions

425×370×115mm 340×245×98mm 300x205x115mm

Unit G.W. 4KG 2.6KG 1.27KG

Carton Dimensions 435x380x240mm(2pcs) 435x380x240mm(4pcs) 420x315x365mm

Carton G.W. 8.6KG 11.5KG 6KG

7


3. Installation

3.1 Notes before installation

3.1.1 Check the product and the parts if complete, the list as below:

Product or parts name Quantity

Microinverter 1

User Manual 1

Screws(1200W) 1

Auxiliary support 1

AC cable 1

3.1.2 Check the installation Ambient if as requested：

Local ambient temperature is -20℃~60℃；

No easy corrosive gas or liquid nearby；

Not be installed in easily flooded or snow-covered areas；

Not be installed in an enclosed or non-ventilated place；

Prohibition install it near flammable materials；

Not be installed in direct sunlight；

Install the Microinverter in the place where children can not touch.

3.1.3 Solar panel if as requested：

Recommend to use 60cells or 72cells solar panel，the Voc must be in the range of the inverter’s

operation voltage range. If you use 36cells solar panel, you can connect 2pcs in series then

connect to Micoinverter, and the total power can’t over 350W.

There have 4 input ports of the MaySun-1200W(2 for Maysun-600W)，we recommend to use 4pcs

(2pcs for MaySun-600W) of solar panel to connect with the Microinverte.

MaySun Microinverters input port use standard MC4 connector, please check if there have MC4

connector of solar panel.

8


3.1.4 Confirm the voltage and frequency of the MaySun Microinverter which you ordered is match with

your local utility grid.

Except bracket, solar panel, inverter and other related parts, you also need the below tools and

parts:

Screw driver

Monkey wrench

Wire stripper

AC distribution box

breaker

3.2 Installation step:

3.2.1

3.2.2

3.2.3

3.2.1 Fix the Maysun Micorinverter in the right position according to the bracket and junction box.（eg.

Install it in the middle of the 4 solar panels.）

Prohibition to connect the Maysun Microinverter to utility grid if do

not install the inverter following the below steps.

Please determine the installation site refer to 3.1.2

Make sure the inverter and bracket grounding, otherwise install a

dedicated line for the inverter of grounding.

9


3.2.2 Use the AC cable to connect the neighboring Maysun Microinverters, and the end terminal of

cable connect to the AC box.

L

N

E

3.2.3 Covered the solar panel with opaque object, then connect the Maysun Microinverter with the solar

panel.

Select the right earth leakage protection switch and breaker according

to the system maximum current.

Before connect the AC box, make sure do not connect to utility grid.

If the AC output voltage in the range of 200-250V, the maximum is 5pcs

Maysun-1200W Microinverters(10PCS for Maysun-600W) for each

branch; if the AC output voltage in the range of 100-130V, the maximum

is 3pcs Maysun1200w Microinverters(6pcs for Maysu-600W) for each

branch; the maximum current is 30A for each branch.

Maysun1200W have 4 DC input ports(Maysun600W have 2), each

input port can connect maximum 350W(20A), over power or over

current will damage the Maysun Microinverters.

10


3.2.4 Check all the terminal in right and stable connected ,then connect to utility grid and remove the

opaque object on the solar panel.

3.2.5 Check the LED on the Maysun Microinverters, if the LED in green, congratulations, you complete

finish the installation.

4. LED instructions： DC power supply the LED，if the DC voltage around 10.5V, the LED will light up.

1、 LED in green：

LED stable green ：Microinverter work，MPPT locked.

LED flicker green：Microinverter work，MPPT is been tracking.

2、 LED in red：

LED stable red：protection statue， check ○1 DC voltage if low（below 10.5V）or high（above 50V）○2 Utility

grid power off or the utility voltage is not match the Microinverter ○3 Short circuit of AC terminal.

Red Green Flashing：○1 Microinverter start to work；○2 input voltage or current not stable, pls check if

there have enough current from the solar panel.

5. Steps for replace fault Microinverter：

1、 Use opaque object to cover the solar panels which connect to the fault Microinverter；

2、 Disconnect the fault Microinverter and utility grid；

3、 Disconnect the fault Microinverter and AC cable；

4、 Disconnect the fault Microinverter and solar panel；

5、 Remove the fault Microinverter from the bracket；

6、 Fix the new Microinverter to the bracket；

7、 Connect the new Microinverter to the AC cable；

8、 Connect the new Microinverter to the solar panel；

9、 Connect the new Microinverter to the utility grid；

10、Remove the opaque object on the solar panel.

11


6. Communication APP user guide，（）

1. Mobile Connection WIFI

2. Scan “Smart Life” download app.

Smart Life

3. Hold down the WIFI switch for a few seconds until the WIFI indicator flashes.

12


WIFI Indicator Flashing

4. Enter “Smart Life” APP Home Page，Click on "+"

5. Click on “ALL devices” ，Click on “Electrical Outlet”orOr anything else.

13


6. Click on the following image

7. Enter the WIFI password (same as the WIFI for mobile phone connection)，Wait a few minutes (cell phones

should be close to devices)

14


maysun-1200w-b maysun-600w-b maysun-300w-b b series user manual.pdfdongguan maywah electronics co....

Documents