High quality Indoor design 500w Solar Micro Grid Tie Inverter for small Solar Power System

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Quick Details
Place of Origin:
Zhejiang, China (Mainland)
Brand Name:
Model Number:
SP-GTI500W 10.5-28V
Output Power:
Output Type:
Input Voltage:
10.5- 28V DC
Output Voltage:
110V 120V or 220v 230v optinal)
On grid Inverters
Output Frequency:
50/ 60Hz
Output Current:
Max 5.50A
Volt. of PV Panel recommended:
Vmp18-21V, Voc20-24V
Peak Inverter efficiency:
AC Power Plug (EU/ UK/ USA/ AU) optional
Wall hanging
1 Year
Working like:
15 Years

High efficiency indoor design 500w Solar Micro Grid Tie Inverter Input 10.5-28V DC for Small solar Power System  



directly connected to the solar panels (do not need to connect the battery)

Using precise 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.


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.

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.

Pure Sine Wave Output
Use SPWM directly to make pure sine wave output.


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.


Power Automatically Locked (APL)
In different current fluctuations, we should use the MPPT function. When the MPPT function adjusted to the maximum power point, the product automatically powers locked in maximum power point, then made the output power more stable.

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.

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.


Parameter Table

Grid-series models200W300W400W500W600W800W1000W
Recommend use solar panels320Wp420Wp520Wp620Wp720Wp1050Wp1250Wp
DC Maximum Input Power300W400W500W600W700W900W1200W
DC maximum voltageVpvDC30.2VDC
DC voltage rangeVpv 10.5V~28VDC
Maximum output power factor99%
Maximum input current15A20A25A30A40A45A65A
AC output power200W300W400W500W600W800W1000W
AC maximum output power200W300W400W500W600W1000W
Anti-voltage protectionFuse
AC standard voltage range90V-140/180~260VAC
AC frequency range55Hz~63Hz/ 45Hz-53Hz
Output current totalTHDIAC <5%
harmonic distortion
Islanding protectionVAC;f AC
Output short circuit protection Current-limiting
Show LED
Standby Power<2W
Night Power<1W
Ambient temperature range-25 °C~60°C
Humidity0~99%(Indoor Type Design)
WaterproofIndoor Type Design
Electromagnetic CompatibilityEN50081.part1   EN50082.part1
Power System DisturbanceEN61000-3-2  EN60950-1
Network testDIN VDE 1026


Easy installing & Multiple Stacking



In order to achieve higher power use requirements, this product can be stacked, such as: 4 grid inverter 500W stacking can achieve 2000W.And the number of the stacking is unlimited.


Single Phase & Three Phase Electrical Schematics




System Block Dragram & Application



Input and output
(1) DC input limit


Input voltage range: 10.5V to 28V

Solar Panel: Recommend using the standard voltage  of 17.5V PV panels or 24V Battery.
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.
Wind turbine system: Rated voltage 24VDC, maximum voltage 28VDC.

(2) AC output:

Voltage range of the inverter whose output is 220V AC.: 170V - 260V

Voltage range of the inverter whose output is 110V AV.: 90V - 160V


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 28.5VDC).
3,Over-temperature protection (when the chassis temperature is above 75°C,
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:
1,Green LED flashing: The inverter is adjusting power output. MPPT is in working condition.
2,Green LED long in time: The inverter is in working condition with the maximum output power.



---Please pay attention of the voltage when use the product. The voltage is from 10.5—28V, if is not these voltage the product may broken.
---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 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.

Accessories for product
One standard AC wire, one warranty card, one user manual and one certificate of quality.





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