Grid Tie SR-250-G, SR-300-G, SR-1000-G, SR-1500-G, SR-2000-G Installation And Operation Manual

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Installation and Operations Manual

SR-G Series Grid Tie Power Inverter

Weight and Dimension of SR-G Series Grid Tie Power Inverter----------------------------------------------25

Outline Drawing of SR-G Series Grid Tie Power Inverter-------------------------------------------------------24

Technical Date of SR-G Series Grid Tie Power Inverter--------------------------------------------------------23

Layout of SR-G Grid Tie Power Inverter --------------------------------------------------------------------------20

Installing SR-G Grid Tie Power System to Three Phases Utility Grid------

Connecting SR-G Grid Tie Power System with Cables and Connectors-----

Installing SR-G Grid Tie Inverter to suitable place-------

Selecting Correct Model of SR-G Grid Tie Inverter---------

Choosing Applicable Solar panels for SR-G Series Grid Tie Inverte

SR-G Grid Tie Inverter Installation ----------------------------------------------------------------------------------7

Advantage of SR-G Grid Tie System -------------------------------------------------------------------------------6

Instruction of SR-G Series Grid Tie Inverter -----------------------------------------------------------------------5

SR-G series Grid Tie Inverter Models ----------------------------------------------------------------------------------3 Model Name Description -------------------------------------------------------------------------------------4 Important Safety Information-------------------------------------------------------------------------------------------4 Safety Instruction----------------------------------------------------------------------------------------------------------4

Installation Procedure ---------------------------------------------------------------------------------------------------8 Step 1

Considering the Total Capacity of the grid tie power system that you need

-----------8

Step 2

--------------------9

Step 3

Selecting Accessory for Grid Tie Power System installation

------------------------------10 Step 4 ---------------------------------11 Step 5 -

Installing Solar Panels to suitable place

------------------------------------------------------13 Step 6 - -----------------------------------13 Step 7 -

--------13

Step 8 –

Grounding the system

-----------------------------------------------------------------------------13

Step 9 –

Connecting the PV modules after complete from Step1 to Step8

---------------------13

Installing larger capacity of grid tie power system----------------------------------------------------------------16

---------------------------------18

Starting DIY from small Grid Tie System---------------------------------------------------------------------------19

Table of Contents

SR-1000-G-H-U 1000W / 900W

SR-300-G-M-U

SR-300-G-L-USR-300-G-L-U

SR-250-G-L-E

SR-250-G-L-U

Table 1, SR-G Grid Tie Inverter Models

of all models, refer to our website

SR-G grid tie inverters include a series of models, refer to

SR-G Grid Tie Inverter Models

table 1. For more information

Model Number

Rated Power

(Peak/Continuous)

AC Output

Voltage Range

AC Output

Frequency Range

Peak Inverter

Efficiency

Night

Power Consumption

250W / 225W

DC Input

Voltage

500W / 450W

600W / 540W

600W /540W

10.8V~30V 90V~140V 46Hz~65Hz

90V~140V 46Hz~65Hz

190V~260V 46Hz~65Hz

90V~140V 46Hz~65Hz

190V~260V 46Hz~65Hz

90V~140V 46Hz~65Hz

190V~260V 46Hz~65Hz

90V~140V 46Hz~65Hz

190V~260V 46Hz~65Hz

22V~60V

250W / 225W

10.8V~30V 190V~260V 46Hz~65Hz

190V~260V 46Hz~65Hz

90%

91%

90%

91%

0.1W

0.2W

0.5W

1.5W

0.5W

1.5W

90%

91%

90%

91%

90%

91%

90%

91%

90%

91%

90%

91%

90%

92%

90%

92%

22V~60V

10.8V~30V

300W / 270W

90V~140V 46Hz~65Hz

90V~140V 46Hz~65Hz22V~60V

10.8V~30V

500W / 450W

190V~260V 46Hz~65Hz

190V~260V 46Hz~65Hz22V~60V

10.8V~30V

22V~60V

10.8V~30V

600W / 540W

600W /540W

190V~260V 46Hz~65Hz

190V~260V 46Hz~65Hz22V~60V

10.8V~30V

22V~60V

45V~90V

22V~60V

45V~90V

SR-250-G-L-U

SR-250-G-M-U

SR-250-G-M-E

SR-250-G-L-E

300W/270W 300W/270W

SR-300-G-L-U

SR-300-G-M-U

300W/270W SR-300-G-L-E SR-300-G-M-E

SR-500-G-L-U SR-500-G-M-U

SR-500-G-L-E SR-500-G-M-E

SR-600-G-L-U SR-600-G-M-U

SR-600-G-L-E SR-600-G-M-E

SR-1000-G-M-U 1000W / 900W

SR-1000-G-M-E 1000W / 900W

SR-1000-G-H-U

1000W/900W

SR-1000-G-H-E

1000W/900W

SR-1500-G-H-U

1500W/1450W

SR-1500-G-H-E

1500W/1450W

SR-2000-G-H-U

2000W/1850W

SR-2000-G-H-E

2000W/1850W

tionary markings in the technical description and on the SR-G Seri

replacement process. Tampering with or opening the SR-G Series Grid

ease read all instructions and cau-

Before installing or using the SR-G Series Grid Tie Inverter, pl

- Do not attempt to repair the SR-G Series Grid Tie Inverter; i

d/or replace SR-G Series Grid Tie

Be aware that the body of the SR-G Series Grid Tie

SR-G Series Grid Tie Inverter, the following safety symbols appear

SR-G Series Grid Tie Inverter.

YYSR-XXX-G-X-X

If it failed, please contact Our customer service to obtain

Important Safety Information

Safety Instructions

Read this First !

This manual contains important instructions to follow during installation and maintenance of

To reduce the risk of electrical shock, and to ensure the safe installation and operation of the

throughout this document to

indicate dangerous conditions and important safety instructions.

WARNING!

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.

NOTE:

This indicates information particularly important for optimal system operation.

Follow instructions closely.

WARNING!

Inverters 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 an Inverters.

t contains no user serviceable

parts.

a RMA number and start the

Tie Inverter will void the

warranty.

es Grid Tie Inverter and the

PV-array.

Model Name description:

AC Output Voltage Range, “U” is 90V~140V, “E” is 190V~260V DC Input Voltage Range, “L” is 10.8V~30V, “M” is 22V~60V, “H” is 45V~90V “G” is Abbreviation of Grid Tie Power Inverter The Rated Output Power The Title Name of Products

A Small Grid Tie Power System with the SR-G Grid Tie Inverter

tion of the SR-G Grid Tie Inverter.

SR-G Grid Tie Power Inverter is the world

Introduction of SR-G Grid Tie Inverter

’s most technologically advanced inverter for

use in utility-interactive applications. This manual details the safe installation and opera-

This integrated system maximizes energy harvest, increases system reliability, and implifies 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 volume, 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 volume 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.

Advantage of The SR-G Grid Tie Power System

There are many advantages of SGPV compare with the traditional grid tie power system.

1. Low cost and easy installation - SGPV can 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. If you are planning to install a grid-tie PV system, in a general way, the solar array and inverter need to be carefully matched to ensure that the inverter’s voltage and power limits are not exceeded. When you want to increase more solar panels, and if the total power of the solar panels exceeds the allocation grid inverter, it is necessary to increase the cost of a grid inverter.

3. Combination of SGPV does not interact - The traditional solar grid tie system, they offer units ranging in high power output and these units are modular so you can have multiple units operating in parallel for large solar arrays. 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 a piece of solar panels in the system, for some reason, such as leaves, bird droppings, dust, shadow, etc. and degrades, the performance of the entire solar power system will decrease. SGPV has no such disadvantage. If the performance of a piece of solar panels in the system degrades, this just effects this piece itself, will not affect other SGPV in the system.

4. Improving the efficiency of the entire solar power system – In traditional grid tie system, the 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 panel 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.

SR-G Grid Tie Inverter to the

Connect the SR-G Grid Tie Inverter to the electrical utility

the user manual, on the SR-G

Before installing the SR-G Grid Tie Inverter, read all

SR-G Grid Tie Inverters.

SR-G Grid Tie Inverter Installation

Follow the instructions in this section to install

WARNING: instructions and cautionary markings in 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: grid only after receiving prior approval from the utility company.

WARNING: Be aware that only qualified personnel should connect 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.

WARNING:This unit is provided with fixed trip limits and shall not be aggregated above 30 kW on a single Point of Common Connection

DO NOT connect SR-G Grid Tie Inverters to the utility grid or

9. Completing SR-G installation map and

7. Connecting SR-G Grid Tie Power System with

6. Installing SR-G Grid Tie Inverter to sui

4. Selecting correct model of SR-G Grid Tie I

2. Choosing applicable solar panels for SR-G Grid Tie Inverter.

Installing SR-G Grid Tie Power System involves several key

Installation Procedure

steps:

1. Considering the total capacity of the grid tie power system that you need.

3. Selecting accessory for installation of the Grid Tie Power System . nverter.

5. Installing solar panels to suitable place.

table place.

cables and connectors.

8. Grounding the system.

Connecting the PV modules.

Each of the detailed installation steps in the following sections is numerically referenced in the installation diagram below.

WARNING:

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 of AC system of your house can hold the feeded power.

Choosing applicable solar panels for SR-G Grid Tie Inverter.

Step2.

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. Most solar 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 PCS 156×156 Poly solar cells are shown below.

Module Efficiency: 14.8% Pmax: 245W Vmp: 29.4V Imp: 8.34A Voc: 36.9V Isc: 8.68A

Note: These specifications are under Standard Test Conditions(STC). STC: Irradiance 1000W/m

, 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.

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).

Selecting Correct Model of SR-G Grid Tie Inverter.

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 type AC cables, according to the standard of the area. You should provide the information to the dealer where you will install the system.

Step4.

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 the AC output of the inverter should fit the standard of AC utility grid.

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

Connecting the SR-G Tie Power System with Cables and Connectors

the inverter to the surface, because some models of SR series grid

Place theSR-G Grid Tie Inverter on a surface protected from direct

Installing SR-G Grid Tie Inverter to suitable place.

and connectors to integrate the Small Grid Tie System.

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.

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

tie inverter have fans on

the bottom cover, so the surface should be flat.

Step7.

After finished from Step1 to Step6, you should connect the solar panels and inverters with cables

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.

from these solar panels, it is suitable for 1KW SR-1000-G model i

Because we should connect 4 PCS solar panels to SR-G Grid Tie Inve

As we stated at Step1, we can get a result that a 1kW SR-G G

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.

rid 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

nverter.

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.

rter, 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.

SR-1000-G-M-E

Fig. 4 1KW SR-G Grid Tie Power System Connected With Method

From these specification, we should to use SR-1000-G-M-E. This is be

From these specifications, we should to use SR-1000-G-H-E. This is b

4, Selecting correct model of SR-G Grid Power Inverter.

nels to Small Grid

Because maybe there will be several methods of connecting solar pa 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

cause, 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

ecause, 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.

DC Input Panel

AC Output Panel

4 × 245Wp Solar Panels Connected in parallel

Outlet of Utility Grid

SR-1000-G-H-E

Fig. 5 1KW SR-G Grid Tie Power System Connected With Method

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”.

DC Input Panel

AC Output Panel

4 × 245Wp Solar Panels

2 Panels Connected in Serial Constitudes a Pair of Panel

2 Pairs Connected in Parallel

Outlet of Utility Grid

SR-1000-G-H-E

SR-1000-G-M-E

Don’t Connect the DC input Terminals of one SR-G Grid Ti

4 × 245Wp Solar Panels

2 Panels Connected in Serial Constitudes a Pair of Panel

2 Pair Connected in Parallel

4 × 245Wp Solar Panels

2 Panels Connected in Serial Constitudes a Pair of Panel

2 Pair Connected in Parallel

Fig.6 2KW Grid Tie Power System Consist of Two 1KW Grid Tie Power System Stacked

WARNING:

e 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.

Solar Panel Array

Fig.7 Error Connecting of DC Input Terminals

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.

In this section, we will explain how to install SR-G Po

Installing Small Grid Tie Power System to Three Phases to 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.

wer System to three phases utility

grid seperately in order to balance the fed power.

A/B/C: 3 phases N: Neutral G: Ground

Fig.8 Three Phases Grid Tie Power System

system with a SR-250-G grid tie

SR-250-G-X-X

panels to connect with SR-250-G inverter.

The smallest power of SR-G series grid tie power inverter is SR-250-G

Starting DIY from small grid tie power system.

If you never have experience of installing grid tie power system before, you can start DIY(do it by yourself) from small grid tie power system.

, this is a small power inverter that the rated output power is 225W, and the peak power can reach 250W, so you can establish a small capacity grid tie power system with this model inverter and a big solar panel or two smaller solar panels, the total Pmax of solar panels should be less than 250Wp. it’s very easy to install this kind small system, just need DC cables and few connectors to connect the system. For example, you can choose a 245Wp solar panel or two 120Wp solar

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.

250Wp Solar Panel

DC Input Panel AC Output Panel

Installing a 250W gird tie power

power inverter and a 250Wp solar panel.

Fig.9 250W grid tie power system with one solar panel

Outlet of Utility Grid

Fig. 11 SR-250-G-X-X,SR-300-G-X-X Layout

SR-250-G-X-X and SR-300G-X-X have same layout, please see the

Layout of SR-G Grid Tie Power Inverter

SR-250-G-X-X

DC Input Panel

AC Output Panel

2×120Wp Solar Panel

Outlet of Utility Grid

Installing a 250W gird tie power system with a TY-250-G grid tie power inverter and two 125Wp solar panels.

Fig.10 250W grid tie power system with two solar panels

It doesn’t matter that you connect small power solar panels like 60Wp, 85Wp or other power to the inverter, the specification of total panels must meet the specification that you choose according to the principle that mentioned in this user manual .

Fig. 11.

DC Input Panel

AC Output Panel

①② ③④⑤

⑥⑦

Fig. 13 SR-1000-G-X-X Layout

SR-500-G-X-X and SR-600-G-X-X have the same layout, please see the

SR-1000-G-X-X layout, please see the Fig. 13

Fig. 12 SR-500-G-X-X, SR-600-G-X-X Layout

①. 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.

②. DC Input Negative Terminal. This terminal will connect to the negative wire of solar

cables that connected with the negative pole of the solar panels.

③. Power Level LED. The three green LED indicators will start to cycle from left to right

when the grid and DC supply is detected. This indicates the inverter is operating under normal condition. The rate of the cycle flashing is according to how much output power is being fed to the utility grid . The more big output power is, the more fast the rate is.

④. Fault LED. This red LED will indicate several informations:

DC Input Panel

AC Output Panel

⑥

Fig. 12

①

②

③

④

⑤

AC Output Panel

⑥

DC Input Panel

①

②

③

④

⑤

Fig. 14 SR-1500-G-X-X /SR-2000-G-X-X Layout

ee the Fig. 14SR-1500-G-X-X / SR-2000-G-X-X With LCD Displayer layout, please s

SR-300-G model, other models of SR-G Series inverter have no such swit

for SR-250-G and

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

ch, 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.

AC Output Panel

DC Input Panel

①

②

③

④

⑤

①. 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.

②. DC Input Negative Terminal. This terminal will connect to the negative wire of solar

cables that connected with the negative pole of the solar panels.

③. LCD Displayer. LCD Displayer has severial functions:

1. Electric parameters measurement function (voltage, current active power, and electric energy).

⑥

Table 3. Common Specifications for SR-G Series Grid Tie Power Invert

Technical Data of SR-G Series Grid Tie Power Inverter

Maximum Input DC Voltage30 V60 V90 V

Peak power Tracking Voltage

14 V - 28 V

26V - 54 V

50 V - 82 V

Operating DC Voltage Range

Peak Inverter Effeciency

10.8 V - 30 V

22 V - 60 V

45 V - 90 V

Nominal Voltage/Range

230V/190V-260V

115V/90V-140V

Frequency Range46Hz~65 Hz46Hz~65 Hz

Output WaveformPure Sine WavePure Sine Wave

Power Factor

>0.95>0.95

MPPT Effeciency 99%

Over Current Protection

Yes

Over Temperature Protection Yes

Reverse Polarity Protection

Yes

Anit-Island ProtectionYes

Stackable

Just for AC Output

Operating Temperature Range

-20℃~ 45℃

-40℃~ 65℃Storage Tmeperature Range

2. Running time function (record load cumulative working hours).

3. Backlight function.

4. Power down data save function (save the number of kWh, operation time).

5. Large screen LCD display (display voltage, current, active power, electric energy, cumulative running time)

④. LCD Displayer Function Selecting Buttons.

UP: Short press will display power, electric energy, current and voltage in anti-sequence. DOWN: Short press will display power, electric energy, current and voltage in sequence. BACK LIGHT: Short press will open or close backlight.

⑤.

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.

⑥. Fan Ventilation Opening. Don’t cover this opening when the inverter is working.

INPUT DATA(DC)

SR-XXX-G-L-X

SR-XXX-G-M-X

SR-XXX-G-H-X

OUTPUT DATA(AC)

SR-XXX-X-E

SR-XXX-X-U

CHARACTERISTIC DATA

SR-XXX-X-X

Fig. 16 SR-500-G-X-X /SR-600-G-X-X Outline Drawing

Fig. 15 SR-250-G-X-X / SR-300-G-X-X Outline Drawing

Outline Drawing of SR-G Series Grid Tie Power Inverter

There are some common specifications of SR-G Series Grid Tie Power Inve24rter shown in Table 3. Other electrical specifications of every model are listed in Table 1.

DC Input Panel

AC Output Panel

Fig. 19 SR-2000-G-X-X Outline Drawing

Fig. 18 SR-1500-G-X-X Outline Drawing

Fig. 17 SR-1000-G-X-X Outline Drawing

DC Input Panel

AC Output Panel

DC Input Panel

AC Output Panel

DC Input Panel

Weight and Dimension of SR-G series Grid Tie Power Inve

Do not attempt to repair the SR-G Grid Tie Inverter, it conta

following troubleshooting steps if the SR-G Grid Tie Power Syst

user-serviceable parts. If it fails, please contact Factory's custome

Troubleshooting

After all installation step described throughout this manual, Qualified personnel can use the

em does not operate correctly. WARNING:

ins no

r service to

obtain an RMA number and start the replacement process.

Status LED Indications and Error Reporting

Each grid tie inverter has a red LED that indicates status as follows: 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 utility grid is out of the range of the specification of the inverter. Please check the AC cables and the outlet of the utility grid, you can use a multi-meter to measure the AC voltage or frequency, then you can judge what’s wrong about the AC output. b) When this red LED is flashing slowly, this indicates that the DC input voltage is too low or the DC connection is not good. You should measure the output voltage of solar panel or solar panel array. c) when this red LED is flashing fastly, this indicates that the DC input voltage is too high, you should adjust the connecting method according to the descripition in this manual.

WARNING: Never disconnect the DC wire connectors under load. Ensure that no current is flowing in the DC wires prior to disconnecting. An opaque covering may be used to cover the module prior to disconnecting the module.

rter

Net Weight1.6Kg

3.6Kg4.5Kg

6.2Kg7.0Kg

Gross Weight 1.8Kg 3.8Kg 4.8Kg 6.6Kg 7.5Kg

Dimension(Package)

245mm×215mm×85mm

335mm×270mm×140mm

400mm×270mm×140mm 470mm×290mm×140mm 520mm×310mm×160mm

SR-250-G-X-X SR-300-G-X-X

model

SR-500-G-X-X

SR-600-G-X-X

SR-1000-G-X-X

SR-1500-G-X-X SR-2000-G-X-X

Grid Tie SR-250-G, SR-300-G, SR-1000-G, SR-1500-G, SR-2000-G Installation And Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual