A solar inverter is a key component in a photovoltaic (PV) system, converting direct current (DC) electricity from the PV panels into alternating current (AC) that household appliances and equipment can use. Solar inverters are crucial in making solar energy systems compatible with the grid.

In addition to connecting the PV panels to the electrical grid, solar Inverters have other important functions. For example, many solar inverters are also equipped with maximum power point tracking (MPPT), which helps optimise the output of the PV system by ensuring that the panels are operating at their maximum efficiency.

There are many brands of solar inverters, but people often buy SMA inverters or Solaredge inverters because they are well-liked in Australia and provide exceptional quality and reliability.

Let’s look at the different types of solar inverters available in the Australian market and which is best for you.

Types of Solar Inverters

#1. String Inverters

String solar inverters connect multiple PV modules in series to form what is known as a "string." The main advantages of string inverters over other types of solar inverters are their scalability and redundancy.

String solar inverters can be easily added to PV systems as they grow, and if one module in a string fails, the system can continue to operate with reduced output using the remaining modules. If you want to buy string inverters, then one of the best residential and commercial PV systems options you can buy is SMA string inverters.

#2. Microinverters

Microinverters are extremely small (about the size of a textbook). A microinverter's advantage includes optimising each solar panel separately, providing more energy.

Solar micro-inverters are smaller versions of grid-tie inverters and are attached to each solar panel rather than being centralised like a grid-tie inverter. Solar micro-inverters maximise energy production by converting direct current (DC) from each solar panel into alternating current (AC).

#3. Power Optimiser Inverter

Solar power optimiser inverters are devices that help increase the efficiency of solar panels by regulating the flow of electricity. They work by monitoring the output of each solar panel and adjusting the voltage as needed to ensure that all panels operate at their maximum efficiency.

This can significantly improve the overall performance of a solar system and can help to improve its return on investment. Power optimiser inverters are used in conjunction with other string inverters.

#4. Hybrid Inverters

A hybrid solar inverter is an inverter that converts solar energy into electrical power and can also connect to the grid to sell excess power back to the utility company. They are generally more expensive than regular solar inverters. But they offer several benefits, including the ability to provide backup power in case of a power outage and sell excess power back to the utility company.

#5. Central Inverters

A central inverter is used for systems that need hundreds of kilowatts (or often megawatts) of volume. They are like enormous metal cabinets and are not intended for home use. Each "cabinet" can manage about 500 kW of power. They are typically employed commercially for large-scale installations. Most businesses buy Solaredge inverters because of their efficiency and reliability.

How to choose the best Inverter?

Following are a few things you should consider when choosing an inverter:

• * You should check the size of your solar system and whether the inverter has the capacity to generate the power supply you need.

• * Check the type of solar panels you're using and understand if your inverters will be compatible with your solar panels.

• * Your budget - inverters come at various price ranges, so first, fix your budget, then search for the ideal inverters that fit your budget.

• * The minimum period of an inverter warranty should be at least five years and preferably ten years. Also, check if you can purchase an extended warranty later, which can last up to 20 years.

Once you've considered these factors, you will be able to find the best inverter for your needs. You can also ask friends and family for recommendations, or better yet, visit a specialist solar retailer.

Conclusion

It's important to consider the brand of the inverter you're purchasing. Some brands are more reputable than others, and you can often find reviews online from people who have purchased these products.

Experts advise buying Solaredge inverters or SMA inverters since they are better, cost-effective, and more trustworthy solar inverters with a basic 12-year guarantee that may be extended to 20 or 25 years.