What are solar inverters?
solar inverters are some of the most important pieces of equipment in a solar power system. It is a device that converts direct current (DC) electricity, which is generated by a solar panel, into alternating current (AC) electricity, which is used by the electrical grid. In DC, electricity is held at a stable voltage in a single direction. In AC, electricity moves in both directions in the circuit as the voltage shifts from positive to negative. Inverters are just one example of a class of devices called power electronics that regulate the flow of electrical energy.
Fundamentally, solar inverters accomplish DIRECT CURRENT to ALTERNATE CURRENT conversion by changing the direction of a DIRECT CURRENT input from one side to the other very quickly. Consequently, the DIRECT CURRENT input turns into an ALTERNATE CURRENT output. Additionally, filters and other electronic components can be used to produce a voltage that varies as a clean, repetitive sine wave that can be injected into the electrical grid.
The sine wave is a shape or pattern that voltage makes over time, and it is the pattern of power that the grid can use without damaging electrical equipment, which is designed to operate at certain frequencies and voltages.
The first inverters were built during the 19th century and were mechanical. A rotary motor, for example, would be used to continuously switch whether the DIRECT CURRENT source was connected forward or reverse.
Today we make electrical switches with transistors, solid-state devices with no moving parts. Transistors are made from semiconductor materials such as silicon or gallium arsenide. They administer the flow of electricity in accordance with external electrical signals.
If you have a residential solar system, your inverter probably carries out several functions. In addition to converting your solar power to ALTERNATE CURRENT power, it can monitor the system and provide a portal for communication with computer grids. Solar and battery storage systems rely on the best solar inverters to operate without grid support in case of outages if they are designed to do so.
Uses of solar inverters
Essentially, it is possible to convert Direct Current (DC) output into an Alternating Current (AC) with a solar inverter. Known as PV Inverters in Dubai, these devices are capable of converting DC current from sources such as photovoltaic panels into AC current for distribution within an electrical grid or for use locally.
Solar inverters and electrical grid
Historically, electrical power has predominantly been generated by burning fuel and creating steam, which then spins a turbine generator, which generates electricity. The motion of these generators produces ALTERNATE CURRENT power as the device rotates, which also sets the frequency or number of times the sine wave repeats. Grid frequency is an important indicator for monitoring the health of the power grid.
For example, if there is too much load (too many devices consuming power), power is removed from the grid faster than it can be supplied. As a result, the turbines will slow down and the ALTERNATE CURRENT frequency will drop. Because turbines are massive, rotating objects, they resist changes in frequency just as all objects resist changes in their motion, a property known as inertia.
As more solar systems are added to the grid, more inverters are connecting to the grid than ever before. Inverter-based generation can produce power at any frequency and does not have the same inertial properties as the steam-based generation, because there is no turbine involved.
As a result, the transition to a power grid with more inverters requires building the best solar inverters that can respond to frequency changes and other interruptions that occur during grid operations, and help stabilize the grid against those interruptions.
Grid services and solar inverters
Grid operators manage the supply and demand for electricity in the electricity system by providing a range of grid services. Grid services are activities performed by grid operators to maintain balance throughout the system and better manage electricity transmission.
Smart inverters can react in a number of different ways when the grid ceases to function as planned, such as when there are variations in voltage or frequency. Normally, the standard for small inverters, such as the type connected to a residential solar energy system, is to stay on during or through short fluctuations in voltage or frequency, and if the interruption lasts a long time or is larger than normal. , they will be disconnected from the grid and turned off.
Frequency response is especially important because a drop in frequency is associated with generation unexpectedly switching off. In response to a change in frequency, the inverters are set to change their power output to restore the standard frequency. Inverter-based resources can also respond to signals from an operator to change their power output as other supply and demand in the electrical system fluctuates, a grid service known as automatic generation control.
To provide grid services, inverters must have power sources that they can control. This could be generated, such as a solar panel that currently produces electricity, or storage, such as a battery system that can be used to provide power that was previously stored.
Another grid service that some of the best solar inverters can provide is grid formation. Grid-forming inverters can start a grid if it fails, a process known as a black boot. Traditional “grid follow” inverters require an external signal from the utility grid to determine when switching will occur to produce a sine wave that can be injected into the utility grid.
In these systems, power from the grid provides a signal that the inverter tries to match. Some of the top 10 solar inverters can generate the signal themselves. For example, a grid of small solar panels might designate one of its inverters to run in grid-forming mode while the rest follow suit, like dance partners, forming a stable grid without any turbine-based generation.
Reactive power is one of the most important grid services that solar inverters can provide. In the grid, voltage, the force that pushes electric charge, is always changing back and forth, as is current, the movement of electric charge. Electrical power is maximized when voltage and current are in sync. However, there may be times when the voltage and current have delays between their two alternating patterns, such as when a motor is running. If they are not in sync, some of the power flowing through the circuit cannot be absorbed by connected devices, resulting in a loss of efficiency.
It will take more total energy to create the same amount of “real” energy: the energy that the charges can absorb. Utility companies provide reactive power to offset this, which synchronizes voltage and current and facilitates the use of electricity. This reactive power is not used by itself but makes other power users.
Many of the top 10 solar inverters can provide and absorb reactive power to help grids balance this important resource. Also, because reactive power is difficult to transport over long distances, distributed energy resources, such as rooftop solar, are especially useful sources of reactive power.
Are there different sizes of solar inverters?
There are several different sizes available for solar inverters. The size needed depends on the size of the solar panels and the solar structure. For example, a 5.0 kW solar power system would require a similar or larger-capacity solar inverter. At its most basic level, an inverter must be equipped to handle the maximum amount of power a solar system could feasibly generate.
Aesthetically, all solar inverters can look very different and are available in a wide range of sizes. The smallest solar inverters are about the size of a business suitcase, while the largest inverters are more like large foreign travel bags.
How do solar inverters work?
A solar inverter works by taking the variable direct current, or ‘DC’ output, from your solar panels and transforming it into 120V/240V alternating current, or ‘AC’ output. The appliances in your home run on AC, not DC, so the solar inverter must switch the DIRECT CURRENT output your solar panels collect.
To get a little more technical, the sun shines on your solar panels (or photovoltaic (PV) cells), which are made from semiconductor layers of crystalline silicon or gallium arsenide. These layers are a combination of positive and negative layers, which are connected by a junction. When the sun shines, the semiconductor layers absorb the light and send the energy to the photovoltaic cell.
This energy circulates and the electrons lose beats, and move between the positive and negative layers, producing an electrical current known as direct current (DC). Once this power is produced, it is either stored in a battery for later use or sent directly to an inverter which depends on solar inverters types.
Solar system energy production
When the power is sent to the inverter, it is in DIRECT CURRENT format, but your home requires AC. solar inverters take the power and pass it through a transformer, which then spits out an ALTERNATE CURRENT output.
The inverter essentially ‘tricks’ the transformer into thinking the DIRECT CURRENT is AC, forcing it to act similar to AC: the inverter runs the DIRECT CURRENT through two or more transistors that turn on and off vrey fast. and feed two variable sides of the transformer.
The different types of Solar Inverters
There are many different types of solar inverters but they all work in the same way. They convert DC electricity into AC current so it can be used around your home or office. But how do you know which one to choose? Read on to find out about the four main kinds: string inverters, micro-inverters, hybrid inverters and power optimisers. You’ll also learn about some of their benefits and disadvantages so that selecting an appropriate inverter for your needs is easy as pie.
Several solar inverters types can be installed as part of a solar system. In a large-scale utility plant or medium-scale community solar project, each solar panel may be connected to a single central inverter. String inverters connect a set of panels, a string, to an inverter. That inverter turns the solar energy generated by the whole string into an alternate current. Although cost-effective, this configuration results in reduced power output on the string if any individual panels experience problems, such as shadows. Once you take a look at our solar inverters price list, you’ll realize you don’t need to worry about the price. We also offer solar inverters for sale.
Microinverters are smaller inverters placed in each panel. With a microinverter, shading or damage to one panel won’t affect the power that can be drawn from the others, but microinverters can be more expensive. Both types of inverters can be assisted by a system that controls how the solar system interacts with the attached battery storage. Solar energy can charge the battery directly on DIRECT CURRENT or after conversion to Alternate Current.
Now that you know what a solar inverter is and how it works, it’s time to look at the different types of inverters. There are 5 different types of solar inverters, which can be found at any solar inverters sale, all with different benefits:
A battery inverter is the best option if you need to retrofit a battery to your solar system or want to keep your battery separate from your solar panels and run it through a different inverter. A battery inverter converts your battery power to 230VALTERNATE CURRENT and feeds it to your distribution board (rather than the utility grid) whenever possible.
A central inverter is huge and is what is used for systems that require hundreds of kilowatts (or sometimes even megawatts) of volume. They are not for residential use and resemble a large metal cabinet, each ‘cabinet’ can handle around 500kW of power. They are typically used commercially for large-scale installations or large-scale solar farms.
Hybrid solar inverters
If you are installing a new Solar PV system with storage, then a hybrid inverter is well worth considering. As solar panels generate DC electricity, we know that an inverter must convert the energy into AC electricity in order to power your home’s appliances. However, solar batteries store electricity in DC form.
A hybrid solar inverter is capable of converting the incoming DC into AC, while also sending any surplus DC power to store in a solar battery, or to be sold to the grid.
Hybrid inverters, also known as “multimode inverters”, are quite uncommon in Australia and allow you to connect batteries to your solar system. It connects with the connected batteries via ‘DIRECT CURRENT coupling’ (when both the solar power and the batteries use an inverter and the DIRECT CURRENT from the solar panels charges the batteries via a DIRECT CURRENT charger) and its electronics organize the charging and battery discharge. At Pas Solar, you can find hybrid inverters for sale at the best price in Dubai.
As the name suggests, microinverters are super small (the size of a book!) and the ratio of solar panels to microinverters is 1:1. The benefit of a microinverter, among others, is that they optimize each solar panel individually, thus offering more power (especially in shady conditions).
Micro inverters are a relatively new technology, becoming a popular choice amongst home solar PV systems. Whereas as solar panel system on a string inverter is impacted by a fault or shading on a single panel, a micro inverter system solves this problem. This is because in a micro inverter system each individual solar panel has an inverter to itself, therefore isolating any issues. As a result, micro inverters are often considered as the way to install more solar panels onto a roof.
Last but not least are the string inverters. String inverters are the most common inverter option for residential use, and there is typically 1 string inverter per solar installation. These are known as string inverters because a “string” of solar panels is linked to them. A ‘string’ is a chain of solar panels that are arranged into groups or rows, connected in series. In order for a string inverter to work efficiently all the panels in a string must be at the same pitch and orientation.
Multiple strings can be connected to a single inverter, in fact many string inverters have 2 or even 3 MPPTs (Maximum Power Point Tracking). This means that you can have a different string of solar panels on each MPPT. This is ideal for an east/west set up, where the two strings of panels will have an unmatched solar generation.
Offering many of the same benefits as micro-inverters, power inverters are also located on each individual panel. Also known as DC power optimizers, power inverters offer panel-level optimization and performance monitoring. Unlike a micro-inverter system, instead of directly converting DC to AC at roof level, the optimizer moves the DC power through to a string inverter. Which is likely fitted next to your battery storage system. As they are at module-level they are often a cheaper alternative to micro-inverters.
What makes a good solar inverter?
When considering the many different solar inverters brands, types of solar inverters, and sizes of inverters, there are a few things you can keep in mind if you want to buy solar inverters. These include:
Are solar inverters CEC approved?
The Clean Energy Regulator has a list of CEC-approved inverters, which is very important to review. Being CEC approved means that it is suitable and approved for Australian climates by the relevant Australian standards, and is of good quality. It’s also worth taking a look at the company itself, its history, and how long it’s been in business. Are they experts in this field, or are they specialists in another area?
What size solar inverter is best?
This is a question that many people get confused with as they want to purchase solar inverters. To get the best clarification we can provide, it is best to get an inverter that can handle the maximum power a solar power system can produce. For example, if you are looking for a 3kW solar power system, you will need a 3kW panel and a 3kW solar inverter. Now, there are exceptions to this rule, but we won’t go into them here (and they’re pretty confusing too!).
Make sure your inverter’s kilowatt rating is equal to or greater than the output of your solar panels.
Is the solar inverter weatherproof?
This is one of the most important to keep in mind when looking for where your investor will be located. If it’s weatherproof, this gives you a bit more flexibility when it comes to placement, but, if it’s not, you may need to consider getting a weatherproof cage for protection (but you’ll have an additional cost).
The general rule of thumb is that the more protected your solar inverter is, the longer it will last and the better it will perform. Check the specifications of the solar inverters you are interested in and talk to the solar installation company to find out where they plan to install the inverter.
Solar inverter display
Take a look at the solar inverter screen and see how much information is available to view directly on your inverter, or if there is an option for remote monitoring (eg from a console in your home). Some of the information that may be contained on the screen includes:
- How many hours the system has been producing power
- The number of kilowatts (kW) the system is currently producing
- The amount of energy (kilowatt hours) the system produces daily
- The amount of electricity (kilowatt hours) the system has produced since installation
There are even remote options for your mobile devices or computers, so it depends on your budget and your requirements when it comes to displaying.
Make sure you read the classification of solar inverters carefully: they are classified in terms of ‘DIRECT CURRENT input’ and ‘ALTERNATE CURRENT output’, so make sure you choose a system that suits your needs.
Solar inverter warranty
This is critical. Most grid-tied solar inverters typically last 10-20 years and (realistically) they should all last 10 years minimum. Depending on the inverter, and the solar inverters price in Dubai, warranties typically last around 5-12 years with some extension options for an additional cost. Take a look at the inverter you’d like and its features, and assess the need for a longer warranty than is offered; Always remember that the longer the warranty, the more protection you will have. Check the on-grid solar inverters Dubai price and get an extended warranty from Pas Solar.
Is it possible to expand the solar inverter?
This is a consideration if you want to expand your solar system in the future. It’s best to talk to a solar electrician about this, as what you need will depend on a lot of different factors (too many to list here!). You need to be aware of the solar inverter price in Dubai, which we can help you know.
Will you be connected to the grid?
If you are going to be grid-connected (where the power from your solar panels goes to your home or the main power grid), be sure to check out solar inverters with an efficiency of at least 93% (transformer based) or 95% (transformer based). without transformer). These are the expected efficiency levels for most good inverter options.
How much should you pay?
This is the most complicated question of all, and we cannot give an exact answer. It depends on the solar inverter price in Dubai, and your requirements as to how much you will have to pay, with prices ranging from $800.00 to $5,000.00 or more, but you can check our solar inverters price list for more information. Pas Solar is an official distributor and solar shop in middle east. The only thing we can tell you is this: if you are planning to buy solar inverters, never buy the cheapest option.
They don’t last, and you’ll buy another inverter much sooner than you should by buying the cheapest option. You can simply buy tier 1 solar inverters for sale from Pas Solar. We guarantee that the inverters you buy from Pas Solar are all among the top 10 solar inverters.
Frequently Asked Questions about solar inverters
How long will deep cycle batteries power solar inverters?
This completely depends on the amount of charge and the capacity of the battery. It can vary a lot. You can increase the power time by adding extra batteries if you don't have enough power for your needs.
How long do solar inverters last?
While solar panels have no moving parts and can be expected to continue to function after 25 years, inverters are arguably the part of the solar panel system most likely to fail. Depending on the brand, they need regular replacements every 5 to 10 years.
What happens when the solar inverter overloads?
Oversizing the inverter also causes the inverter to run at high power for longer periods, affecting its lifespan. Operating at higher power also increases the heating of the inverter and can heat its surroundings. Inverters will lower their peak power production due to overheating.