Home > News > LATEST NEWS > How Does A Pure Sine Wave Inve.....
Hot Products
Latest News

Several Common USB Interface Types

The full name of USB is Universal Serial Bus, which is a serial bus standard and a technical specification for input and output interfaces. It is wide...

Tips For Successful Camping

After the global pandemic hit the Global in 2020, the proportion of first-time campers across the U.S. grew five-fold, with nearly half saying they pl...

Staying Safe During a Heat Wave

We are seeing record-breaking temperatures throughout the country this summer. Are you prepared for the next heat wave? Certain areas of the country a...

How to Install a Pure Sine Wave Inverter at Your Home?

Successfully installing a pure sine wave inverter depends largely on the quality of materials used for the installation. To get this right, we assume ...

How Does A Pure Sine Wave Inverter Work ?

Inverters in Renewable Energy Inverters are a very important part of the transition to renewable energy. They are necessary because solar panels give ...

Why Choose Pure Sine Wave Power Inverter ?

Let us first understand the basics before you choose an inverter for your specific requirement. You buy an inverter as a substitute for the grid power...

Portable Lithium Power Station VS Portable Gasoline Generator

Currently backup power is becoming a necessity for people everywhere. Gasoline and propane generators have been a mainstay in the backup power space f...

Benefits of Portable Power Stations

1.What is a Portable Power Station? A portable power station is a battery-powered rechargeable generator. They will power up all kinds of gear from sm...

What are inverters and do I need them?

What are inverters and do I need them? Inverters turn the DC output collected from your solar panels into alternating current (AC), which is the stand...

How to Maintain Battery Life of Inverter system ?

When using Inverter power supply system, people tend to unilaterally believe that there is no need to maintain batteries. However, the data show that ...

Precautions for using the inverter

1.The DC voltage must be consistent Each inverter has a DC voltage value such as 12V, 24V, etc. It is required that the battery voltage selected must ...

Can a Modified Sine Wave Inverter Damage Electronics?

If you enjoy camping, having a pure sine wave inverter for your camper is quite useful so you can run your electronics while you are in the wild. Modi...

Frequency FAQ of power inverter

As a beginner to the inverter, you may have a lot of questions about this product and how to choose it. Here are some frequency FAQ we have summarized...

Portable Power Station VS Gas Generators

Today let’s talk about portable lithium power station and gas generator which one is better for outdoor camping? And which one is more cost-effective...

Portable power station for outdoor travel and home

Portable power station , also called portable emergency power supply, outdoor power supply, etc.It can be defined many names according to different ap...

BRIDNA New Arrival PPS500-4 Solar Power Stations

An extraordinary amount of research, design, technology, and innovation goes into the creation of every product, from the earliest PCBA to the final p...

Why is it worth investing in a Pure Sine Wave Inverter?

The power inverter is used to convert direct current into alternating current, thus enabling the use of mains-powered devices. It is perfect for vehic...

What is Portable Power Station?

A Portable power station is a rechargeable battery-powered generator,which built-in lithium ion battery and equipped with AC outlet, DC port and USB c...

About the self-discharge of portable power station’s lithium batteries

The consistency of the self-discharge is one of the important part of the effect factor,the SOC of battery with inconsistency self-discharge will have...

Learn more about portable power station

Portable Power Station built-in lithium-ion battery, which can store electric energy and has an AC output. It’s lightweight, high capacity, high powe...
Contact us
Address:Room 201,Unit 3,Jinhuwan Industrial Park NO.23,Fucheng Street, Longhua New District, Shenzhen,China
Contact:Christal Chu
Contact Now


How Does A Pure Sine Wave Inverter Work ?

Inverters in Renewable Energy

Inverters are a very important part of the transition to renewable energy. They are necessary because solar panels give a direct current (DC) power output, which basically means the current flows one way. However, nearly all of our homes and businesses use alternating current (AC) power, where the current flows in both directions at a given frequency. Inverters sit between the solar array and the house or business, converting the DC output from the solar panels into useable AC output.

Development of inverter technology has been a key part of the explosion in renewable energy. Early inverters were expensive, inefficient (throwing power away and heating up) and problematic. Even now, problems with inverters are the most common type of problem experienced by owners of solar arrays. Modern inverters are more efficient, cheaper, smaller, smarter and much more reliable than their earlier counterparts.

DC Power vs AC Power

DC power is pretty self-explanatory. The current runs one way only. In the case of solar cells, the current will vary fairly slowly through the day as the suns’ intensity changes, but the current will always flow the one way. If we plot current vs time, we get the DC graph shown below.

AC power is different. The current not only flows both ways, but it’s intensity changes rapidly. When current is plotted against time, the curve forms a ‘wave’. There are all sorts of different types of waves for AC power. However the type of wave that we use in our homes and businesses is called a ‘sine wave’. The AC curve in the figure below is a sine wave.

The inverter’s job is to take the DC power and convert it to an AC power curve.

Converting DC Power to AC Power

Early inverters used mechanical switches to create simple versions of AC power, and there are some (cheap) inverters using mechanical switches still available today. The simplest version just switches on and off, producing the ‘chopped’ waveform shown below. For higher frequency, the switch turns on and off more rapidly.

dc to ac inverter pure sine wave

The next step up is instead of turning the current off, the switch is more complex and actually reverses the current. This converts to the DC current to an alternating ‘square wave’ current. Again, the frequency can be adjusted by changing how fast the switch operates.

dc to ac 220v inverter pure sine waves

Some types of equipment without sensitive electronics can run on this type of power. However homes and businesses need their AC power to be more like a sine wave.

Sine Wave Inverters

Changing DC current to sine wave AC current requires more complex electronics. The figure below is a circuit diagram for a ‘do-it-yourself’ sine wave inverter.

pure sine wave solar dc to ac power inverter

Sine wave inverters work in three stages: the oscillator stage, the booster or amplifier stage, and finally the transformer stage.

The oscillator stage does what the title says it does: changes the DC current to an oscillating AC current. The oscillating current can be set to a particular frequency: for the United States the frequency is 60 Hz. This means there are 60 full waves per second. The DC current is converted to this type of AC current using integrated circuits. However at this stage the oscillations, or wave heights are quite small, too small to power anything useful. The wave heights need to be increased, hence the next stage.

The booster stage simply takes the signal from the oscillator stage and amplifies it. This creates waveforms with much higher wave heights, high enough for useful power. However there is one thing left to get right before the power can go to a home or business: the voltage.

The final transformer stage gets the voltage right. A typical residential array may have DC voltages up to about 600V. Commercial arrays can have even higher voltages, for example 1000V or even higher. In the United States, AC power is delivered at 120 V. Stability of this voltage is very important for stability of the grid and equipment that runs off the grid. Hence voltage control is a very important part of an inverter.