Pure Sine Wave Inverter/Power Inverter 300W, DC 12V to AC 220V/230V STI 300

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Product Description:

 

Description

STI series is a sine wave power frequency inverter which can convert 12V or 24V DC to 220VAC or 230VAC 50Hz based on full digital and intelligent design. The inverter can be applied in many fields especially for solar photovoltaic power system.

 



Features:

·Complete isolation-type inverter technology, noiseless output
·Adoption of advanced SPWM technology, pure sine wave output
·Dynamic current loop control technology to ensure inverter reliable operation.
·Wide DC input voltage range
·Excellent EMC design
·Low output harmonic distortion(THD≤3%)
·LED indicators display input voltage range, load power range, normal output & failure state
·Optional energy saving mode
·Wide working temperature range (industrial level)
·Continuous operation at full power


Protections:

·Output Short Circuit protection
·Overload protection
·Input reverse polarity protection
·Input low voltage protection
·Input over voltage protection
·Inverter abnormal protection
·Overheating protection



Specification:

Model

STI300-12-220

STI300-24-220

STI300-12-230

STI300-24-230

Nominal battery voltage

12V

24V

Input voltage range

10.5~16V

21~32V

Consumption no load(ON)

≤5W

≤6W

Consumption no load (Saving)

≤2W

≤2W

Output voltage

AC220/230V±3%

Continuous power

300VA

Power 10sec

450VA

Power 1.5sec

600VA

Surge power

960VA

Output mode

Single Phase

Wave form

Pure Sine Wave

Frequency

50Hz±0.2%

Distortion THD

( resistive load)

≤ 3%

≤ 2%

Efficiency at rated power

≥81%

≥87%

Max. efficiency

≥90%

≥91%

Dimension

315*166*101mm

Net  weight

5.3kg

Working  

temperature

-20℃~ +50℃

Humidity

< 95%(non-condensation)

Altitude

< 5000m(Derating to operate according to IEC62040 at a height exceeding 1000 m)

 FAQ

 

 

Q1:Can we visit your factory?

A1:Sure,welcome at any time,seeing is believing.

 

Q2:Which payment terms can you accept?

A2:T/T,L/C,Moneygram,Paypal are available for us.



 

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Q:Installation and maintenance of photovoltaic grid - connected inverter
, any failure that affects the safety performance of the inverter must be immediately removed before turning on the inverter again.
Q:What is the difference between a grid-connected inverter and an off-grid inverter? What are the advantages of a hybrid inverter?
Off-grid inverter is equivalent to their own to establish an independent small power grid, mainly to control their own voltage, is a voltage source.
Q:What are the methods of photovoltaic grid-connected inverter control
Inverter main circuit need to have a control circuit to achieve, generally have square wave and sine wave two control methods, square wave output inverter power supply circuit is simple, low cost, but low efficiency, harmonic components. Sine wave output is the development trend of the inverter, with the development of microelectronics technology, there are PWM function of the microprocessor has also come out, so the sine wave output inverter technology has matured.
Q:PV grid-connected inverter can directly load it?
Grid-connected inverter is usually equipped with island protection function, can only receive the power grid, if the load directly, the output is disconnected.
Q:What is the difference between a PV grid-connected inverter and an off-grid inverter?
Off-grid inverter is equivalent to their own to establish an independent small power grid, mainly to control their own voltage, is a voltage source.
Q:What is the PV inverter starting voltage
sine wave becomes narrower and the voltage width in the center of the sine wave is widened and the switching element is always operated in a direction at a certain frequency in a half cycle, A pulse wave train (pseudo sine wave). Then let the pulse wave form a sine wave through a simple filter
Q:After the PV inverter, how to achieve the same period before the network?
When the voltage, frequency, phase does not meet the requirements, the automatic closing closing pulse.
Q:Grid-connected inverter is generally divided into photovoltaic power generation grid-connected inverter, wind power grid-connected inverter, power equipment and grid-connected inverter and other power generation equipment power generation inverter.
Grid-connected inverter is generally used with large-scale photovoltaic power plant system, a lot of parallel PV string is connected to the same set of inverter DC input, the general power of the use of three-phase IGBT power module, power
Q:The function of photovoltaic grid - connected inverter
After some additional voltage buffering, the left side of the bridge is usually 18 ~ 20khz switching frequency, the dc voltage is converted to ac voltage.
Q:Generally a large grid-connected photovoltaic power plant will have several inverters
, This method is simple to design, easy maintenance, but also for the power grid harmonics smaller, good power quality!

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