Deye SUN-20K-G04 User manual

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User Manual
Grid-tied PV String Inverter
SUN-20K-G04
SUN-25K-G04
SUN-18K-G04


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
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 
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
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


- 01 -
On-grid inverter can convert solar panel DC power into AC power which can directly input to
the grid. Its appearance is shown below. These models contain SUN-18K-G04, SUN-20K-G04,
SUN-25K-G04.

Pic 1.1 Front view 

Photovoltaic Grid-connected System

About This Manual


How to Use This Manual

Contents may be periodically

The latest manual can be acquired via [email protected]

Inverter Metering Power grid
Family load

- 02 -
1.2 Parts list
Please check the following table, to see whether all the parts are included in the package


screws M4×12



DC power connectors







User
manual

Square hole sealing plate






 

When ordering the sun limiter, it will includes 3pcs CT.

 

- 03 -

2.1 Safety signs






Shock Hazard:

which if not correctly followed, could result in electric shock.
High Temperature Hazard:

followed, could result in burns.
Safety Hint:


Warning:

followed, could result in serious injury or death.
Shock Hazard:


Warning:

of the country or local area.
Warning:
Inverter adopts non-isolated topology structure, hence must insure DC input and


Otherwise it will damage the inverter.

- 04 -
2.3 Notes for using
Shock Hazard:


Shock Hazard:
While disconnect the input and output of the inverter for maintenance, please

High Temperature Hazard:

Please do not touch the inverter case.

It can ensure the personal safety of the user. But as a electric device, it may cause shock or








obtaining the permission of the local power supply department, the professionals can
connect the inverter to the grid.




disconnect the DC side.



- 05 -

Pic 3.1 Front panel display
3.1 Interface View
3.2 Status Indicator



alarm. red indicates alarming.
Explanaon
Inverter detects DC input
Low DC input voltage
Grid Connected
Grid Unavailable


Detected faults or report faults

Indicator status




on

on

on

on

Table 3.1 Status indicator lights
ACDC AlarmNormal



UP, Below
DOWNESCENTER.

;
.
3.4 LCD Display




Esc Up Down Enter

- 07 -










sunlight or raining.


.


- 08 -





each inverter must be at least 500mm above and below.And must install the inverter at the
place where children cannot touch. Please see picture 4.3.

indicator status clearly.

Safety Hint:


15

- 09 -
4.2 Inverter of inverter
500mm
500mm


Anchoring

Stainless steel screws
Inverter



- 10 -



accessory to lock inverter heat sink to the hanging plate, to ensure that the inverter will not
move.







- 11 -




2. Switch the DC lsolator OFF.

Safety Hint:

cause serious damages to the inverter.
Safety Hint:


Safety Hint:


Safety Hint:

 
Cable type Range Recommended value
Cross secon



 

- 12 -





Pic 5.3 Disassemble the connector cap nut


Pic 5.4 Crimp the contact pin to the wire
Pic 5.5 connector with cap nut screwed on

- 13 -
, shown as

Warning:
Sunlight shines on the panel will generate voltage, high voltage in series may

panel needs to be blocked by the opaque material and the DC switch should
be 'OFF', otherwise, the high voltage of the inverter may lead to life-





AC side of the inverter, the AC side is equipped with Three phase AC terminals that can be
-

Outside cable

Cable CSAModel Cable outer dia AWG Breaker Max cable length
SUN-18K/20K/
25KW 810mm 20-30mm 
Warning:



- 14 -
-





Warning:

Pic 5.8 Strip AC cable


1. Matching socket 2.Sleeve 3.Sealing core 4.Sealing nut
Pic 5.7 AC connector structure
1 2 3 4


right length, as shown in Picture 5.8.

- 15 -







-


all PE cables of the inverter need to be connected to the same grounding copper platoon to

picture 5.11.
Warning:


than 300 mA or higher, otherwise inverter may not work properly.



prevent overcurrent. See table 5.3 below.

- 17 -

sealed plate as shown in Picture 5.14. When installing the datalogger, remove the sealing plate,



power on. When the inverter is on the DC power, it is determined whether the datalogger is









PC
Router
WIFI
GPRS
Web Server
Phone

Rated output
voltage(V)
Inverter Rated output
current(A)
Current for protecon
device(A)
SUN-18K-G04 230 45
SUN-20K-G04 230 4529
SUN-25K-G04 230 45

- 18 -











When start up the inverter, should fellow below steps
1. First switch on the AC breaker.

and power, the inverter will start.
3. When the AC voltage and DC voltage are normal, the inverter start-up is ready to begin. The

crystal will show that the inverter is self-checking.
4. If the parameter is within acceptable range, the inverter will generate energy.
NORMAL indicator light is on.
6.1 Start up the inverter



connector. The inverter will close the LCD and all led within two minutes.



