SY-GDV-300W Grid Tie Inverter User Manual
GDV Grid Series
Dongguan Shengyang industrial Co., Ltd.
SY-GDV-300W Grid Tie Inverter
User Manual
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liability. This guide and the latest information maybe have some error, but we will improve on time. If no prior notice
changes, but incorporated into the new user manual, Dongguan Shengyang industrial Co., Ltd. has the final say.
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Address: No1 ShangXin Road,Xin Nong Cun,Xin'an Community, Chang'an Town,DongGuan China
GDV Grid Series
System Function
Wide voltage input(10.5-30VDC)
Achieve wide voltage input.
1、DC voltage input:10.5-30VDC
2、Second level power variable voltage conversion
High-frequency two-way and one-way grid function
1、 High frequency direct modulation, AC half wave synthesis
2、 Two-way grid means: Load consume directly. And can reverse AC current transmission.
3、 One-way grid means: Load consume directly. And banned reverse AC current transmission.
Kinds of frequency output function.
It can apply to 50Hz and 60Hz frequency of AC.
Frequency range: 45Hz ~ 63Hz
directly connected to the solar panels (do not need to connect the battery)
Using precise Dynamic differential pressure type MPPT function, APL functions, the inverter automatically
adjust the solar panels of maximum output power,simply connect the solar panel to the grid inverters. Do not
need to connect the battery.
1、 Differential pressure type MPPT: 0.1 V accuracy
2、 Power lock: 5W (AC output)
AC 0 angle with high precision auto-detection
AC phase angle of 0 through isolation amplifier then input to the MCU for high-precision detection and analysis.
The phase shift rate is less than 1%, thus achieve high-precision with phase modulation AC output together.
1、 AC phase shift: < 1%
2、 Over-zero protection: 0.2 VAC
3.AC switching: 50Hz / 60Hz(automatic detection, automatic switching)
Synchronous High-frequency Modulation
In the process of the grid, usually adapt the same phase angle in parallel. (ie, When the two-phase alternating
current total is equal to 0.Use switch to combination the two AC fusion) and the product is rectified AC
half-frequency AC to 100Hz first, then the machine use the high frequency current in the circuit and
semi-100Hz frequency alternating current generated combination, to achieve high-frequency modulation.
1、 Modulation synthesis: half wave and full-bridge modulation synthesis (100Hz / 120Hz)
2、 Synthetic way: MOSFET full-bridge
3、 High frequency: 50KHz
Pure Sine Wave Output
Use SPWM directly to make pure sine wave output.
1、Output waveform: Adopt complementary PWM to push-pull pure sine wave.
2、Generate means: enhancement-mode SPWM
Automatic Sensing Function Solar Luminosity
Use the latest luminosity perception operation technology. The different illuminate angle and intensity of the
solar panel will produce different current output. Use advanced CPU to operate the different illuminance and the
data can be directly displayed on the LCD. Then you can visually see the sense of the strength of the sun unit.
Used more convenient.
1、 Luminosity sampling point :power sampling point
2、 High precision AD sampling: integral AD sampling method
Power Automatically Locked (APL)
In different current fluctuations, we should use the MPPT function. When the MPPT function adjusted to the
GDV Grid Series
maximum power point, the product automatically powers locked in maximum power point, then made the
output power more stable.
1、Power lock: The biggest sampling point of MPPT.
Automatically Adapt To Different Load Power Factor
Adapt to any of the power load.
Constant Current, Constant Power
This product is constant current, constant output power, without any overload, over-current phenomenon.
Automatically Shut Down When The Power Output Of a Fault
When the city power system is in failure, the inverter will automatically turn off the output.
Current Limit Protection
Current limit
Stack Multiple Machines
Multiple small power inverters in parallel can achieve large output power.
High-Frequency High Conversion Rate
Adapt high frequency converter, the output more efficient.
Maximum Power Point Tracking (MPPT)
Because the current intensity and the voltage changes at any time, if there is no power point tracking, there
will be a lot of problems. In the past time, usually adopt a solar controller, but this product uses high-precision
MPPT operation power, automatic and immediate adjust the solar panels output power at the maximum output
point, then achieve a stable output purposes. MPPT is for short of " Maximum Power Point Tracking". It means
the controller can sense the voltage of the solar panels on time, and can track the highest voltage and current
(VI).Then made the inverter discharge to power grid with the highest efficiency.
The peak voltage (Vpp) of the solar panels is about 19.5V when it in factory. And the environment
temperature is 25 ℃ .The reason of setting this temperature(interestingly, different from the subjective
imagination, we ordinary people the conclusion may let us surprised) is that when the weather is very hot, solar
panels’ peak voltage will fall to about 17.5 V while in cold weather, the peak voltage can achieve 20.8 V.
Now we back to contrast the difference of MPPT solar energy grid inverter and traditional inverter. The
traditional solar inverter is a bit like the manual gearbox. When the engine speed increase, while the gearbox gear
don't increase at the same time, it will definitely affect the speed of the car. For traditional inverter speaking, the
parameter output power is been set in factory. It likes a car have been fixed set on fixed 1 gears, no matter how
powerfully you trample accelerator, the speed of a car is limited. While have the MPPT function it will be
different, it is automatically. It will automatically adjust the gears according to the engine’ speed, so it can make
cars in the most gears in a reasonable efficiency standard operation. It means the MPPT controller can track the
maximum power point of solar panels in real-time then express the biggest efficiency of solar panels. The higher
the voltage, the more power can be output through the MPPT. Thus improve the charging efficiency.
Theoretically speaking, using MPPT, the efficiency can be increased by 50% compared with the traditional
inverter. But due to environmental impact and various around energy loss, the ultimate efficiency can improve
20%-30% according to our actual testing.
GDV Grid Series
Parameter Table
SY-GDV Grid-series models
Recommend use solar panels
DC MAX input current
AC MAX output power
DC MAX Open-circuit input-voltage
DC input voltage range
MAX output power factor
DC input Reverse voltage protection
AC output voltage range
90~140VAC or 190V-260V(120V/230V)
AC frequency range
Output current total harmonic distortion
AC Phase
Islanding protection
Output short circuit protection
60KHz modulation,power line carrier-current communication(Is under development)
Communication way
Standby Power
Night Power
-25 ℃~65℃
Ambient temperature range
0~99%(Indoor Type Design)
Indoor Type Design
Electromagnetic Compatibility
Power System Disturbance
EN61000-3-2 EN62109
Network test
DIN VDE 1026
94 V0
Fire prevention level(PCB)
Packing and weight
Net weight
G weight
Size (L x W x H)
21 x 16.5 x5.3cm
Package (L x W x H)
Inner box:34x25x15.5CM
Big box:51x37x33CM(6units/CNT)
Wall hanging
AC power cord length
User Guide
GDV Grid Series
1、Installation Connection
1、Red terminal: Connect DC positive, black terminal: Connect DC negative. Show in Figure 1.
Figure 1
3、 AC socket: Connect to the mains. Put the side of the AC cord which has holes into the inverter with 3 foot
outlet and the other side of the AC cord to home 3PIN AC outlet. Show in Figure 2
Figure 2
3、Switch: Connect the connections in right way, then turn on the switch. The inverter starts to work.
GDV Grid Series
Figure 3
2、Grid tied inverter used in the wind and solar street lights.
Use this product, do not need to add solar panel controller, battery.
Connection Method 1 (Figure 4 below):
Figure 4
Connection Method 1: Wind energy, solar energy can supply to the grid at the same time, then achieve the highest
efficiency. First consider this connection method. Figure 4
3、Stack using
In order to achieve higher power use requirements, this product can be stacked, such as: 5 grid inverter300W
stacking can achieve 1500W.And the number of the stacking is unlimited. Used as shown in Figure 5:
Figure 5
GDV Grid Series
4、Input and output
1、DC input limit
 Input voltage range: 10.5V to 30V
Solar Panel: Recommend using the power more than 300W and the standard voltage of 18V PV panels.
Recommend using multiple solar panels. Solar panel in series will result in high-input voltage which will
exceed the working voltage range of the inverter.
2、AC output:
 Output 220V AC power inverter can be used in voltage: 190V - 260V, 50/60 Hz
 Output 110V AC power inverter can be used in voltage range: 90V - 140V, 50/60 Hz
5、LED Indicator:
1、Red LED:
1、Low-voltage protection (input DC voltage is less than 10.5VDC).
2、Over-voltage protection (Input DC voltage is greater than 30VDC).
3、Over-temperature protection (when the chassis temperature is above 75℃,
the temperature dropped about 2-10 minutes to restart automatically after cooling).
4、Fault Protection (when 110VAC or 220VAC power outage or shutdown).
5、Islanding protection: When the electric supply stop, the inverter automatically shut down output.
2、Green LED(horse race lamp):
The higher the power output, green LED scrolling flash the more quickly.
---Non-professionals do not disassemble. Only qualified personnel may repair this product.
---Please install inverter in the low humidity and well-ventilated place to avoid the inverter over-heating, and
clear around the inflammable and explosive materials.
---When using this product, avoid children touching, playing, to avoid electric shock.
---Recommended Maximum DC input 4AWG cable capable of handling more than 50A of the
cable size.
---Optimal length of the DC input line 1.8M or less, long cable will allow solar panels to the inverter
DC voltage drop caused by wear and tear.
---Connected to a power outlet to provide AC.
---Connected solar panels, battery or wind generators DC input DC power supply cable.
---Proposed wind power plant with its own charge controller and load dump.
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