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
2
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

6
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.

9
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.

10
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).

11
Selecting DC cables
Before you connect the solar panels to inverter, suitable specification of cables should be
selected. The selection of specifications of the cables is according to the total power of the
solar panels and the connecting method of solar panels.
You should calculate the maximum current that will transit through the cables, we mark it as
Imax. First, calculate the total Pmax of the solar panels that will be consisted of the grid tie
power system, we mark it as TPmax, then calculate the total Vmp of them, we mark it as
TVmp, we also can get total Imp, mark it as TImp, with this, we can get the TImax using a
formula (1) or (2) shown below.
TImp = TPmax/TVmp ------ (1)
or TImp = Imp×N ------ (2) N is the parallel number of solar panels
After finish the calculation of Imax, then we can pick suitable cables according to Table 2.
It’s the best that you choose solar cables for outdoor use.
Selecting Connectors
When installing the SGPV system, maybe you should use some connectors for connecting
solar panels and inverter. Most of these connectors are shown as below.
MC4 Connectors Connectors for parallel connecting
Selecting AC cables
AC cables will be supplied with inverters by our factory, different countries will be supplied
different typeAC cables, according to the standard of the area. You should provide the
information to the dealer where you will install the system.
Step4. Selecting Correct Model of Sunshine Grid Tie Inverter.
When finished step1 to step3, and decided the connecting method of the solar panels,
then you can select a correct model of inverter. The input DC voltage range of the
inverter should fit the DC output voltage of the solar panel array, the rated power of the
inverter should also fit the total power of the solar panel array, and theAC output of the
inverter should fit the standard of AC utility grid.

12
AWG Diameter Diameter Area Resistance Resistance Max Current Max Frequency
[inches] [mm] [mm2] [Ohms /1000 ft] [Ohms/ km] [Amperes] for 100% skin depth
0 (1/0) 0.3249 8.25246 53.5 0.0983 0.322424 150 250 Hz
1 0.2893 7.34822 42.4 0.1239 0.406392 119 325 Hz
2 0.2576 6.54304 33.6 0.1563 0.512664 94 410 Hz
3 0.2294 5.82676 26.7 0.197 0.64616 75 500 Hz
4 0.2043 5.18922 21.2 0.2485 0.81508 60 650 Hz
5 0.1819 4.62026 16.8 0.3133 1.027624 47 810 Hz
6 0.162 4.1148 13.3 0.3951 1.295928 37 1100 Hz
7 0.1443 3.66522 10.5 0.4982 1.634096 30 1300 Hz
8 0.1285 3.2639 8.37 0.6282 2.060496 24 1650 Hz
9 0.1144 2.90576 6.63 0.7921 2.598088 19 2050 Hz
10 0.1019 2.58826 5.26 0.9989 3.276392 15 2600 Hz
11 0.0907 2.30378 4.17 1.26 4.1328 12 3200 Hz
12 0.0808 2.05232 3.31 1.588 5.20864 9.3 4150 Hz
13 0.072 1.8288 2.62 2.003 6.56984 7.4 5300 Hz
14 0.0641 1.62814 2.08 2.525 8.282 5.9 6700 Hz
15 0.0571 1.45034 1.65 3.184 10.44352 4.7 8250 Hz
16 0.0508 1.29032 1.31 4.016 13.17248 3.7 11 k Hz
17 0.0453 1.15062 1.04 5.064 16.60992 2.9 13 k Hz
18 0.0403 1.02362 0.823 6.385 20.9428 2.3 17 kHz
19 0.0359 0.91186 0.653 8.051 26.40728 1.8 21 kHz
20 0.032 0.8128 0.518 10.15 33.292 1.5 27 kHz
21 0.0285 0.7239 0.41 12.8 41.984 1.2 33 kHz
22 0.0254 0.64516 0.326 16.14 52.9392 0.92 42 kHz
23 0.0226 0.57404 0.258 20.36 66.7808 0.729 53 kHz
24 0.0201 0.51054 0.205 25.67 84.1976 0.577 68 kHz
25 0.0179 0.45466 0.162 32.37 106.1736 0.457 85 kHz
26 0.0159 0.40386 0.129 40.81 133.8568 0.361 107 kHz
27 0.0142 0.36068 0.102 51.47 168.8216 0.288 130 kHz
28 0.0126 0.32004 0.081 64.9 212.872 0.226 170 kHz
29 0.0113 0.28702 0.0642 81.83 268.4024 0.182 210 kHz
30 0.01 0.254 0.0509 103.2 338.496 0.142 270 kHz
31 0.0089 0.22606 0.0404 130.1 426.728 0.113 340 kHz
32 0.008 0.2032 0.032 164.1 538.248 0.091 430 kHz
33 0.0071 0.18034 0.0254 206.9 678.632 0.072 540 kHz
34 0.0063 0.16002 0.0201 260.9 855.752 0.056 690 kHz
35 0.0056 0.14224 0.016 329 1079.12 0.044 870 kHz
36 0.005 0.127 0.0127 414.8 1360 0.035 1100 kHz
37 0.0045 0.1143 0.01 523.1 1715 0.0289 1350 kHz
38 0.004 0.1016 0.00797 659.6 2163 0.0228 1750 kHz
39 0.0035 0.0889 0.00632 831.8 2728 0.0175 2250 kHz
40 0.0031 0.07874 0.00501 1049 3440 0.0137 2900 kHz
Table 2: American Wire Gauge (AWG) Cables / Conductor Sizes and Properties

13
Step5. Installing Solar Panels to suitable place.
Installing the solar panels of the SGPV to suitable location that sunshine can irradiate on
them, there must have no shadow, the installation direction of the solar panels should be
according to the geography position that the system will be installed, different position should
has different installation direction, the principle is to get maximum irradation in all the year
round.
Warning: Ensure that there is no shadow at the location that solar panels will be installed,
because even the shadow just covers only one cell of solar panel, maybe will cause total
system stop to produce power.
Warning: Ensure using strong braket to fix the solar panels to avoid the danger under
high wind.
Step6. Installing Sunshine Grid Tie Inverter to suitable place.
Place the Sunshine Grid Tie Inverter on a surface protected from direct sunlight, high
temperatures, and water. The inverter requires at least 150mm of clearance around itself for
ventilation. The inverters are for indoor use, can’t use at outdoor. You can use screws to fix
the inverter to the surface, because some models of Sunshine grid tie inverter have fans on
the bottom cover, so the surface should be flat.
Step7. Connecting the Sunshine Grid Tie Power System with Cables and Connectors
After finished from Step1 to Step6, you should connect the solar panels and inverters with cables
and connectors to integrate the Sunshine Grid Tie System.
Step8. Grounding the system.
Route a continuous GEC through each of the solar panels to the NEC approved AC grounding
electrode. The racking and module could be grounded to this conductor using a crimp
connection. An alternative method would be to connect the grid tie inverters to the grounded
racking using a grounding washer approved for the racking. The ground wire of the AC cables
is connnected to the housing of inverter when the AC cables is connected to the inverters, so
when the AC plug is inserted to the socket of AC outlet of utility grid in the house, the ground pin
of the socket must be connected to the Earth ground.
Step9. Connecting the PV modules after complete from Step1 to Step8.
Warning: If you will connect the PV modules to the inverter under sunshine, you should cover
the modules with no transparent material like black cloth, if the modules have been connected in
serial, just cover one module, actually, just need to cover one cell of the module, but if the
modules have been connected in parallel, you should cover one module of every branch, also
just need to cover one cell when you cover a module.
Covering the modules under sunshine just in order to avoid the sparkle when connect the cables.
Example of Installation of 1KW grid tie power system
In order to explain the installing operation, we assume that there is a house that the usual
electricity consumption is about 5KWH per day, and the real irradiation time is about 5
hours.
1, Considering the total capacity of the grid tie power system that you need.
As we stated at Step1, we can get a result that a 1kW Sunshine Grid Tie Power System is
suitable for this house, so we will establish a 1KW gird tie power system step by step, we
also assume that we will install the system in the house where the utility grid is 230V/50Hz.
2, Choosing applicables Solar Panels.
Because the most popular solar panels are 240Wp~250Wp poly panels with 60 PCS solar
cells, so choosing this kind type panels will be more economical. The system is 1KW power
system, so we should use 4 PCS 240Wp to 250Wp solar panels.
Most of this kind type solar panels have similar specification shown below.
Module Efficiency:14.8% Pmax:245W
Vmp:29.4V Imp:8.34A
Voc:36.9V Isc:8.68A
so use 4 PCS of this type panels, we can get total power:
TPmax = 245Wp×4 = 980Wp
from these solar panels, it is suitable for 1KW SUN-1000G model inverter.
Notes: The Pmax specification of solar panel is under STC, the actual power is variational
according to the irradiation on the panel and the temperature surroundings. The real output
power can’t reach Pmax at most time in whole day.
3,Selecting Accessory for Grid Tie Power System installation.
Because we should connect 4 PCS solar panels to Sunshine Grid Tie Inverter, so some
connectors are necessary. Consider of the Voc, Vmp and Isc, we choose some MC4
connectors and some connectors for parallel connecting.
For the choice of DC cables, we should consider about the connecting method of solar panels,
there are two methods can be choosed.
Method 1: Connecting the 4 panels in parallel, so the maximum DC current will be
TImp = TPmax/TVmp = 980W/29.4V = 33.3A or
TImp = Imp × 4 = 8.34A × 4 = 33.3A
According to the Table 2, AWG6 Cables should be choosed.
Method 2：Connecting 2 panels in serial consist as a pair, so 4 panels can be gotten 2 pairs,

14
Step7. Connecting the Sunshine Grid Tie Power System with Cables and Connectors
After finished from Step1 to Step6, you should connect the solar panels and inverters with cables
and connectors to integrate the Sunshine Grid Tie System.
Step8. Grounding the system.
Route a continuous GEC through each of the solar panels to the NEC approved AC grounding
electrode. The racking and module could be grounded to this conductor using a crimp
connection. An alternative method would be to connect the grid tie inverters to the grounded
racking using a grounding washer approved for the racking. The ground wire of the AC cables
is connnected to the housing of inverter when the AC cables is connected to the inverters, so
when the AC plug is inserted to the socket of AC outlet of utility grid in the house, the ground pin
of the socket must be connected to the Earth ground.
Step9. Connecting the PV modules after complete from Step1 to Step8.
Warning: If you will connect the PV modules to the inverter under sunshine, you should cover
the modules with no transparent material like black cloth, if the modules have been connected in
serial, just cover one module, actually, just need to cover one cell of the module, but if the
modules have been connected in parallel, you should cover one module of every branch, also
just need to cover one cell when you cover a module.
Covering the modules under sunshine just in order to avoid the sparkle when connect the cables.
Example of Installation of 1KW grid tie power system
In order to explain the installing operation, we assume that there is a house that the usual
electricity consumption is about 5KWH per day, and the real irradiation time is about 5
hours.
1, Considering the total capacity of the grid tie power system that you need.
As we stated at Step1, we can get a result that a 1kW Sunshine Grid Tie Power System is
suitable for this house, so we will establish a 1KW gird tie power system step by step, we
also assume that we will install the system in the house where the utility grid is 230V/50Hz.
2, Choosing applicables Solar Panels.
Because the most popular solar panels are 240Wp~250Wp poly panels with 60 PCS solar
cells, so choosing this kind type panels will be more economical. The system is 1KW power
system, so we should use 4 PCS 240Wp to 250Wp solar panels.
Most of this kind type solar panels have similar specification shown below.
Module Efficiency:14.8% Pmax:245W
Vmp:29.4V Imp:8.34A
Voc:36.9V Isc:8.68A
so use 4 PCS of this type panels, we can get total power:
TPmax = 245Wp×4 = 980Wp
from these solar panels, it is suitable for 1KW SUN-1000G model inverter.
Notes: The Pmax specification of solar panel is under STC, the actual power is variational
according to the irradiation on the panel and the temperature surroundings. The real output
power can’t reach Pmax at most time in whole day.
3,Selecting Accessory for Grid Tie Power System installation.
Because we should connect 4 PCS solar panels to Sunshine Grid Tie Inverter, so some
connectors are necessary. Consider of the Voc, Vmp and Isc, we choose some MC4
connectors and some connectors for parallel connecting.
For the choice of DC cables, we should consider about the connecting method of solar panels,
there are two methods can be choosed.
Method 1: Connecting the 4 panels in parallel, so the maximum DC current will be
TImp = TPmax/TVmp = 980W/29.4V = 33.3A or
TImp = Imp × 4 = 8.34A × 4 = 33.3A
According to the Table 2, AWG6 Cables should be choosed.
Method 2：Connecting 2 panels in serial consist as a pair, so 4 panels can be gotten 2 pairs,
TImp = TPmax/TVmp = 980W/58.8V = 16.7A or
TImp = Imp × 2 = 8.34A × 2 = 16.7A
So according to the Table 2, AWG9 cables should be choosed.
Because the DC cables will be more expensive if the diameter is big, considering about this
matter, the method that can use smaller diameter cables will be a good choice.
4, Selecting correct model of Sunshine Grid Power Inverter.
Because maybe there will be several methods of connecting solar panels to Sunshine Grid
Tie Inverter, different connecting method maybe should use different model inverter. In this
case, there are two connecting methods.
With method 1, because all panels are connected in parallel, so we can know that the
TVoc(total Voc of the solar panels) will be same as Voc of one panel, and the TVmp also
is same as Vmp of one panel. So we can get the specifications of the solar panels array
with solar panels connected each other.
TPmax:245W×4 TVmp:29.4V
TImp:8.34A×4 TVoc:36.9V
TIsc:8.68A×4
From these specification, we should to use SUN-1000G-M-E. This is because, the DC input
voltage range of this model is 22V to 60V, so the TVoc and TVmp is in the DC input voltage
range
With method 2, we also can get the specifications of the solar panels array.
TPmax:245W×4 TVmp:29.4V×2
TImp:8.34A×2 TVoc:36.9V×2
TIsc:8.68A×2
From these specifications, we should to use SUN-1000G-H-E. This is because, the DC
input voltage range of this model is 45V to 90V, so the TVoc and TVmp is in the DC input
voltage range.

TImp = TPmax/TVmp = 980W/58.8V = 16.7A or
TImp = Imp × 2 = 8.34A × 2 = 16.7A
So according to the Table 2, AWG9 cables should be choosed.
Because the DC cables will be more expensive if the diameter is big, considering about this
matter, the method that can use smaller diameter cables will be a good choice.
4, Selecting correct model of Sunshine Grid Power Inverter.
Because maybe there will be several methods of connecting solar panels to Sunshine Grid
Tie Inverter, different connecting method maybe should use different model inverter. In this
case, there are two connecting methods.
With method 1, because all panels are connected in parallel, so we can know that the
TVoc(total Voc of the solar panels) will be same as Voc of one panel, and the TVmp also
is same as Vmp of one panel. So we can get the specifications of the solar panels array
with solar panels connected each other.
TPmax:245W×4 TVmp:29.4V
TImp:8.34A×4 TVoc:36.9V
TIsc:8.68A×4
From these specification, we should to use SUN-1000G-M. This is because, the DC input
voltage range of this model is 22V to 65V, so the TVoc and TVmp is in the DC input
voltage range
With method 2, we also can get the specifications of the solar panels array.
TPmax:245W×4 TVmp:29.4V×2
TImp:8.34A×2 TVoc:36.9V×2
TIsc:8.68A×2
From these specifications, we should to use SUN-1000G-H. This is because, the DC
input voltage range of this model is 45V to 90V, so the TVoc and TVmp is in the DC input
voltage range.
The two connecting method diagrams are shown in Fig.4 and Fig.5 below.

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Comparing the connected method in Fig.4 and Fig5, we can see that method 2 is the good
choice, because with method 1, the DC cables is more thick, so it is more expensive, and
three pairs of connectors for parallel connecting plus three pairs of MC4 connectors should
be used.
But with method 2, the DC cables is thin, and just a pair of connectors for parallel connecting
and a pair of MC4 connector should be used.
Installing larger capacity of grid tie power system.
Sometimes, maybe you are willing to install larger capacity of grid tie inverter in your house,
this is also very easy to operate. For example, you want to install 2KW grid tie power system,
you can install two 1KW grid tie power systems as shown in Fig.5, two AC output cables
should be all connected to the AC outlet of the utility grid with the plugs.
The diagram of the 2KW grid tie system with two 1KW sytem are shown in Fig. 6, we call this
kind system as “Stackable System”.

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WARNING: Don’t Connect the DC input Terminals of one Sunshine Grid Tie Power
Inverter to another’s. If so, neither of the inverters can find the correct maximum power
point(MPP), this will reduce the efficiency of the system. Shown in Fig.7.
You can install any capacity of grid tie power system by stack small grid tie power systems.
For example, if you want to install 12KW grid tie power system, there are many choices, you
can stack six 2KW grid tie power systems, or twelve 1KW gird tie systems, or stack
twenty-four 500W grid tie power systems, or stack fourty-eight 250W grid tie power system,
even you can mix different capacity grid tie power systems to gain large capacity system.

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Installing Sunshine Grid Tie Power System to Three Phases Utility Grid.
When the Capacity of Gird Tie Power System is larger, intall all the power system to one
phase of the utility grid is not reasonable, maybe this will cause unbanlance of the three
phase of the utility grid.
In this section, we will explain how to install Sunshine Power System to three phases utility
grid seperately in order to balance the fed power.

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For example, installing a 3KW grid tie power system to three phase utility grid.
The diagram is shown in Fig. 8, we seperate 3KW power sytem to three power system units,
every unit has 1KW power. Connecting every system unit to different phase, this can
balance all grid tie power to three phases of the utility grid.
Fllow this way, you can install more large grid tie power system to three phases, just
seperate the whole power system to three equal power system units.
Layout of Sunshine Grid Tie Power Inverter
SUN-1000G2-X layout, please see Fig. 9
Fig. 9 SUN-1000G2-X layout

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a) When the red LED is on all time, this indicates that the AC output cables is not
connected with the utility grid, or the AC voltage or frequence of the uitlity grid is out
of the range of the specifications of the inverter.
b) When this red LED is flashing slowly, this indicates that the DC input voltage is too
low.
c) when this red LED is flashing fastly, this indicates that the DC input voltage is too
high.
⑤. Fan Ventilation Opening. Don’t cover this opening when the inverter is working.
⑥. AC Output Outlet. The inverter will be attached a AC cable when you buy it, one
terminal of this AC cables should be connected to the AC output outlet, and another
terminal should be connected to the outlet of the utiltiy grid.
⑦. AC Output Voltage Switch. This switch is an unique set just for SUN-250G and
SUN-300G model, other models of SUN Series inverter have no such switch, with this
switch, you can set the inverter for 220V to 240V utility grid of many European
countries and other countries when the switch is set to 230V position or set the
inverter for 100V to 120V utility grid for many countries like USA, Japan and other
countries when the switch is set to 115V position.
WARNING:
Don’t change the position of this switch when the inveter is connected
to the utility grid. You must pull out the AC plug of the AC cables from the utility grid
before you change the position of the switch, otherwise, the inverter will be damaged.
SUN-2000G2-X layout, please see the Fig. 10
Cooling fans.
DC Input Positive Terminal. This terminal will connect to the positive wire of solar
cables that connected with the positive pole of the solar panels.
①.
DC Input Negative Terminal. This terminal will connect to the negative wire of solar
②.
cables that connected with the negative pole of the solar panels.
③. AC socket,This socket will connect the inverter to the public grid via the AC cable.
④.
⑤.
Fig 10. SUN-2000G2-X layout