GWL SUN Series User manual

G2(Generation 2) SUN Series Grid Tie Power Inverter
With Limit Sensor and WIFI Plug connectors
Installation and Operation Manual
1
SUN-1000G2SUN-2000G2

Table of Contents
Sun Series Grid Tie Inverter Models ---------------------------------------------------------------------------------3
Important Safety Information-------------------------------------------------------------------------------------------4
Safety Instruction----------------------------------------------------------------------------------------------------------4
Instruction of Sunshine Grid Tie Inverter ---------------------------------------------------------------------------5
Advantage of Sunshine Grid Tie System --------------------------------------------------------------------------6
Sunshine Grid Tie Inverter Installation ----------------------------------------------------------------------------7
Installation Procedure ---------------------------------------------------------------------------------------------------8
Step 1
Considering the Total Capacity of the grid tie power system that you need -----------8
Step 2 Choosing Applicable Solar panels for Sunshine Grid Tie Inverter ------------------------9
Step 3 Selecting Accessory for Grid Tie Power System installation ------------------------------10
Step 4 Selecting Correct Model of Sunshine Grid Tie Inverter---- ---------------------------------11
Step 5 - Installing Solar Panels to suitable place ------------------------------------------------------13
Step 6 - Installing Sunshine Grid Tie Inverter to suitable place -----------------------------------13
Step 7 - Connecting Sunshine Grid Tie Power System with Cables and Connectors --------13
Step 8 – Grounding the system -----------------------------------------------------------------------------13
Step 9 – Connecting the PV modules after complete from Step1 to Step8 ---------------------13
Technical Date of SUN Series Grid Tie Power Inverter---------------------------------------------------------24
Outline Drawing of SUN Series Grid Tie Power Inverter-------------------------------------------------------25
TroubleShooting----------------------------------------------------------------------------------------------------------26
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Installing larger capacity of grid tie power system----------------------------------------------------------------16
Installing Sunshine Grid Tie Power System to Three Phases Utility Grid----------------------------------18
Layout of Sunshine Grid Tie Power Inverter --------------------------------------------------------------------19
Inverter Display Instruction ---------------------------------------------------------------------------------------------21
AC output current waveform and PF test of 2000W model---------------------------------------------------27

3
Model
Rated Power
(Max./Continuous)
AC Output Voltage
AC Output Frequency
Max. Effeciency
Night
Power Consumption
DC Input
Voltage
95V~265V45Hz~64Hz
95V~265V
185V~265V
1.0W
1.5W
1.5W
90%
92%
92%
22V~65V
45V~90V
SUN-1000G2-M
SUN-1000G2-H
1000W / 900W
1000W / 900W
45V~90V
SUN-2000G2-H
G2 Sun Series Grid Tie Inverter Models
Sun series grid tie inverters include several models, refer to table 1.
Table 1,G2 Sun Series Grid Tie Inverter Models
2000W / 1800W
Model Name description:
SUN-XXX G2-X
DC Input Voltage Range, “M” is 22V~65V, “H” is 45V~90V
“G2” is Abbreviation of Generation Two
The Rated Output Power
The Title Name of Sun Series Products
45Hz~64Hz
45Hz~64Hz

Important Safety Information
Safety Instructions
4
Read this First !
This manual contains important instructions to follow during installation and maintenance of
Sunshine Grid Tie Inverter.
To reduce the risk of electrical shock, and to ensure the safe installation and operation of the
Sunshine Grid Tie Inverter, the following safety symbols appear throughout this document to
indicate dangerous conditions and important safety instructions.
WARNING! This indicates a situation where failure to follow instructions maybe cause a
safety hazard or equipment malfunction. Use extreme caution and follow instructions
carefully.
NOTE: This indicates information particularly important for optimal system operation.
Follow instructions closely.
WARNING!
Be aware that the body of the Sunshine Grid Tie Inverter is the heat sink and can
reach a temperature of 80℃under extreme conditions. To reduce risk of burns, do not touch.
- Perform all electrical installations in accordance with all local electrical codes and the
National Electrical Code.
- Be aware that only qualified personnel should install and/or replace Sunshine Grid Tie
Inverter.
- Do not attempt to repair the Sunshine Grid Tie Inverter; it contains no user serviceable
parts.
If it failed, please contact Sunshine customer service to obtain a RMA number and start the
replacement process. Tampering with or opening the Sunshine Grid Tie Inverter will void the
warranty.
Before installing or using the Sunshine Grid Tie Inverter, please read all instructions and cau-
tionary markings in the technical description and on the Sunshine Grid Tie Inverter and the
PV-array.

5
Introduction of Sunshine Grid Tie Inverter
Sunshine Grid Tie Power Inverter is the world’s most technologically advanced inverter for
use in utility-interactive applications. This manual details the safe installation and opera-
tion of the Sunshine Grid Tie Inverter.
This integrated system maximizes energy harvest, increases system reliability, and
simplifies design, installation and management.
The small type solar grid tie power inverter can obtain the solar energy from solar panel, and
can tie to the grid through its output cables with no extra equipment. The installation is very
convenient and reliable.
We call the system combining with small solar grid tie inverter and solar panels as ‘SGPV’.The
system includes solar panels and small type grid tie inverter and installation kit. Solar panels
can be mono silicon, polygon silicon, non-crystal film or any other material that can transform
solar energy to electric energy. The power of grid tie inverter should be matched to the power
of solar panels connected. So the power of SGPV is defined by its solar panels, it can be
standardization according to the actual using.
The inverter can be connected to any outlets of utility grid at house. The small grid tie inverter
monitors the voltage, frequency and phase of the home utility grid, then produce pure sine
wave AC power that the frequency and phase are as same as the grid's, and the voltage is a
bit higher than the grid's, then according to the current controlled PWM, to control the output
power to the grid. The small grid tie inverter just puts out power when the home grid is on.
When the sun shines, the PV panel will produces DC voltage, and the grid tie inverter will
change the DC voltage to AC voltage and puts out power to the home grid. When the total
power of electric apparatus that are using in the house is larger than the output power of the
inverters, these power from the inverters will be consumed in the house, this will slow down
the power meter, otherwise, the difference of the output power of the inverter between the
total used power of the apparatus will go out from the house to the out grid.
Fig 1. A Small Grid Tie Power System with Sunshine Grid Tie Inverter

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Advantage of The Sunshine Grid Tie Power System
There are many advantages of SGPVcompare with the traditional grid tie power system.
1.Low cost and easy installation - SGPVcan make full use of all types of buildings’ surface
that face to the sun in the city as well as fast and easy installation of solar modules and grid tie
inverter. It just needs very low maintenance costs.
2. Free combination - SGPV can be used as a separate grid tie system and can be setup as a
large solar array with many of them. The quantity of SGPV in the array is just according to your
desire.
3. Combination of SGPV does not interact - The traditional solar grid tie system is alway
connected with many panels, and those solar panels are connected in series, so the input
voltage is very high,although, the traditional grid inverter has MPPT feature (Maximum
Power Point Tracking), but the maximum power point is according to the entire series in
terms of solar panels array, if the performance of one piece of solar panels in the system, for
some reason, such as leaves, bird droppings, dust, shadow, etc. and degrades, performance
of the entire solar power system will decrease.
SGPV system has no such disadvantage. If the performance of a piece of solar panels in the
system degrades, this just effects one SGPV, will not affect other SGPV in the system.
4.Improving the efficiency of the entire solar power system – In traditional grid tie system, many
solar panels are connected in series, so the MPPT of the inverter is according to the total
panels in series, not to every panel, but there is difference between every panel, so not every
panel is working at the maximum power, this will reduce the total power of these panels
in series.
But SGPV has no such disadvantage. Because every inverter of SGPV has MPPT function, so
every panel is working at the maximum power, this will increase the efficiency of the entire
system.
5. Low power consumption – Most of the parts in the small grid-tie inverter are digital ICs and
low power MCU, so the power consumption of it is low, though the quantity of grid tie inverters
is increased, but this will not increase the power consumption much of the entire system.
Multiple inverters can be connected in parallel to creat bigger system.Plug and play installation.

Sunshine Grid Tie Inverter Installation
Follow the instructions in this section to install Sunshine Grid Tie Inverters.
WARNING: Before installing the Sunshine Grid Tie Inverter, read all
instructions and cautionary markings in the user manual, on the Sunshine
Grid Tie Inverter, and on the photovoltaic array.
WARNING: Perform all electrical installations in accordance with all local
electrical codes and the National Electrical Code (NEC)
WARNING: Connect the Sunshine Grid Tie Inverter to the electrical utility
grid only after receiving prior approval from the utility company.
WARNING: Be aware that only qualified personnel should connect the
Sunshine Grid Tie Inverter to the electrical utility grid.
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.
7

8
Installation Procedure
Installing Sunshine Grid Tie Power System involves several key steps:
1. Considering the total capacity of the grid tie power system that you need.
2. Choosing applicable solar panels for Sunshine Grid Tie Inverter.
3. Selecting accessory for installation of the Grid Tie Power System .
4. Selecting correct model of Sunshine Grid Tie Inverter.
5. Installing solar panels to suitable place.
6. Installing Sunshine Grid Tie Inverter to suitable place.
7. Connecting Sunshine Grid Tie Power System with cables and connectors.
8. Grounding the system.
9. Completing Sunshine installation map and Connecting the PV modules.
Each of the detailed installation steps in the following sections is numerically
referenced in the installation diagram below.
WARNING: DO NOT connect Sunshine Grid Tie Inverters to the utility grid or
energize the AC circuit(s) until you have completed all of the installation
Step1. Considering the total capacity of the grid tie power system that you need.
The total capacity of the whole grid tie power system is according to your power
consumption in the site that you want to install, or how much power that you want it to
feed to the utility grid. Actually, the volume is just according to your willingness, because
when the total power of electric appliances that are being used in the installation site is
larger than the output power of the grid tie power system, these power from the system
will be consumed in the site, this will slow down the power meter, otherwise, the
difference of the output power from the system between the total used power of the
appliances will feed to the utility grid.
For example, if you want to install a grid tie power system in your house, you could decide
the total power volume according to the total power the appliances that you use in your
house, maybe the consumption of total energy in per day is about 5KWH, then you should
realize the real irradiation time in per day at your site, actually the real irradiation time is an
average result, because it will vary every day according to the climate, just assume the
time is 6 hours, so you can install a 1KW grid tie power system, with this capacity of the
system,it can supply all power consumption in whole year.
When grid tie power system is working, sometimes, there is extra power feed to utility grid
if the power from the grid tie system is larger than the power consumed by the appliances
in your house, and sometimes will not when it is not larger.
Of course, you can install 500W grid tie power system or 2KW grid tie inverter, even
more large capacity or more small capacity grid tie inverter, it doesn’t matter. But if the
capacity is too big, you should consider the volume ofAC system of your house can hold
the feeded power.
If you want not to allow the system to feed extra power to the grid, you can use limit
function of the inverter.

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Step2. Choosing applicable solar panels for Sunshine Grid Tie Inverter.
Descripiton of Solar Panel
Solar panel is an array of solar cells, it is an electrical device that converts the energy
of light directly into electricity by the photovoltaic effect. when exposed to light, it can
generate and support an electric current without being attached to any external voltage
source.
Mostsolar panels consist of solar cells conected in serial. Recently, main solar cells
have two types, Mono and Poly, their performance are almost same.
The main technical data of solar panel including Efficiency, Pmax,Vmp, Imp, Voc,
Isc, etc. For example, the specifications of one type 245W solar panels consist of 60
cells are shown below. Pmax: 245W
Module Efficiency: 14.8%
Vmp: 29.4V
Voc: 36.9VImp: 8.34A
Isc: 8.68A
Note: These specifications are under Standard Test Conditions(STC).
STC: Irradiance 1000W/m
2
, Cell temerature 25℃, Air mass AM1.5 according to
EN60904-3.
Module Efficiency is the converting efficiency that the module converts the energy of
light into electricity power.
Pmax is the Maximum Power of solar panels.
Vmp is the Rated Voltage at Pmax.
Imp is the Rated Current at Pmax.
Voc is the Open Circuit Voltage.
Isc is the Short Circuit Current.
Because these specifications are under STC, these specifications also are sensitive
with temperature of surroundings, so should consider the vary of these specification with
temperature. Please check the curves of I-V and Temperature Dependence of Isc, Voc,
Pmax.

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Fig 2. I-V Curves Fig 3. Temperature Dependence of Isc, Voc, Pmax
The I-V Curves shown in the Fig. 2 is a solar panel’s I-V curves that the power is 230W.
You can get the information from this I-V curves that different irradiance under sunshine
will get different power from same solar panel, and also different power will be converted
under same irradiance but the output of DC voltage is different, the solar panel just can get
maximum power at one point under a certain irradiance, this point is called maximum
power point(MPP). The MPP also is sensitive with temperature of surroundings.
The temperature dependence of Isc, Voc, Pmax shown in the Fig. 3. You can see that the
Pmax and Voc have negative temperature character, Vmp also has same character.
Choosing solar panels
The most important specifications when selecting solar panels are Pmax,Voc, Vmp and
Isc.
1, The total Pmax of solar panels should be equal to or less than the Rated Power(Peak)
of the inverter that you will connect.
2, The total Voc of solar panels should be less than the maximum point of the DC input
range of the inverter, it is according to the connecting method, if you connect solar panels
in parallel, all panels must have same Voc, the Pmax of each panel can be different or
same, so the total Voc is as same as one Voc, but if you connect solar panels in serial, the
Isc of each solar panel must be same, the Pmax of each panel can be different or same,
so the total Voc is the summation of all solar panels connected in serial. Connecting solar
panels with same specifications in a single system is the best choice.
3, The total Vmp of solar panels should above the minimum point of the DC input range of
the inverter. The connecting method principle is as same as item 2 above.
Step3. Selecting Accessory for Grid Tie Power System installation.
The accessory for grid tie power system including:
1, DC cables will be connected with solar panels and inverters.
2, Connectors.
3, AC cables.
4, Power meter(Optional).
5, Bracket for solar panels installation(not included in this user manual).