Solar Inverters

How they work and why they matter

Solar panels often get most of the attention, but the inverter is a crucial part of any solar system. While panels generate electricity from sunlight, the inverter converts it into usable power for your home. Without an inverter, the energy from your solar panels could not safely power your appliances, lighting, air conditioning, or household devices. A quality inverter helps manage system performance, monitor solar generation, and support future upgrades like battery storage or electric vehicle charging. Understanding what an inverter does, the types available, and how it affects your solar setup can help you make a more informed decision when comparing systems.

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How Do Solar Inverters Work?

Solar panels generate electricity as direct current (DC) power. While this electricity is well-suited to solar generation, most Australian homes use alternating current (AC) power. The inverter connects your solar panels to your home, converting DC electricity into AC electricity your household can safely use.
As your solar system generates energy during the day, the inverter continuously monitors production and adjusts to maximise efficiency. It directs solar energy to your home first, letting appliances run on power from your roof. If your system produces more electricity than needed, the excess may be exported to the grid or stored in a compatible battery.

BModern solar inverters do far more than simply convert electricity. Many provide real-time performance monitoring through smartphone apps, detect faults within the system, track energy production and help optimise overall system performance. Depending on the type of inverter installed, they may also support battery storage, backup power functionality and future energy technologies such as electric vehicle charging.

For most homeowners, the inverter is often described as the "brain" of the solar system. While solar panels generate the energy, the inverter controls how that energy is converted, managed and delivered throughout your home, making it one of the most important components in any solar installation.

Inverter Types & Selection Guide

Types Of Solar Inverters & Which One Suits Your Home?

Different inverter types suit different homes. The right choice depends on your roof layout, shading, battery plans, future energy needs and whether your system is designed for simple grid-connected solar or a more advanced setup.

Inverter Type	Best For	Key Advantage	Common Recommendation
String Inverter	Standard residential roofs with good sunlight and simple panel layouts.	Cost-Effective	Best for many standard homes where panels face similar directions and shading is limited.
Hybrid Inverter	Homes installing solar and battery storage, or planning to add a battery later.	Battery Ready	Best for households wanting future flexibility, battery compatibility or energy independence.
Microinverters	Complex roofs, split orientations or systems needing panel-level optimisation.	Panel-Level Control	Best for roofs with multiple faces, varying panel positions or performance monitoring needs.
Power Optimisers	Partially shaded roofs or systems where individual panel performance may vary.	Shade Support	Best when some panels may be affected by trees, chimneys, antennas or neighbouring structures.
Off-Grid Inverter	Remote homes, standalone systems and properties not relying on grid electricity.	Independent Power	Best for rural, remote or off-grid properties requiring a dedicated standalone energy system.

Which Inverter Is Best For Most Homes?

For many standard residential solar systems, a string inverter is a practical and cost-effective choice. If you are planning battery storage, future EV charging or want a more flexible energy setup, a hybrid inverter may be a better long-term option. Complex or partially shaded roofs may benefit from microinverters or optimisers.

Inverter Lifespan & Upgrade Guide

How Long Do Solar Inverters Last & When Should You Upgrade?

Solar inverters generally do not last as long as solar panels, which means many households will need to replace or upgrade their inverter during the lifetime of their solar system. The right time to upgrade depends on age, performance, compatibility and future energy plans.

Typical Solar Component Lifespans

Lifespans vary by brand, installation quality, environment, maintenance and system design, but these estimates are a useful general guide.

Solar Panels

25–30+ Years

String Inverter

10–15 Years

Hybrid Inverter

10–15 Years

Microinverters

20–25 Years

Battery System

10–15 Years

Your Inverter Is Over 10 Years Old

Older inverters may be closer to the end of their expected service life, especially if performance has started to decline or monitoring is no longer reliable.

You Are Planning Battery Storage

Some older inverters are not compatible with modern battery systems. Upgrading to a hybrid inverter may make sense if battery storage is part of your future plan.

You Keep Seeing Fault Codes

Frequent inverter errors, shutdowns or communication issues can be signs that the inverter needs inspection, repair or replacement.

You Want To Expand Your Solar System

Your existing inverter may not support additional panels, higher capacity or a new system configuration, especially if your energy usage has increased.

You Are Planning EV Charging

Future electric vehicle charging can significantly change household energy demand, so your inverter and solar system design may need to be reviewed.

Should You Replace Or Upgrade Your Inverter?

If your inverter is still working well, replacement may not be urgent. However, if it is older, unreliable, incompatible with batteries or limiting your ability to expand the system, an inverter upgrade can improve performance, monitoring and future flexibility.

Inverter Problems & Final Checks

Common Solar Inverter Problems & What They May Mean

Inverter issues can affect solar performance, monitoring and energy savings. Some problems are simple communication faults, while others may indicate a system, grid or electrical issue that needs professional attention.

No Power Output

This may be caused by a grid outage, inverter shutdown, electrical fault or system protection mode.

Check Promptly

Low Solar Production

Reduced output may be linked to shading, dirty panels, panel faults, inverter issues or seasonal conditions.

Performance Issue

Error Codes

Error messages can point to communication faults, grid voltage issues, system faults or inverter protection events.

Needs Diagnosis

Wi-Fi Monitoring Not Working

This is often caused by router changes, weak signal, app issues or lost communication between the inverter and monitoring portal.

Common Fault

Inverter Not Turning On

The inverter may not start if there is an electrical fault, isolation issue, DC/AC supply problem or internal failure.

Professional Check

Frequent Shutdowns

Repeated shutdowns may be caused by grid voltage issues, overheating, system faults or inverter age.

Investigate

Final Tip: Don't Ignore Inverter Warnings

Your inverter is one of the first places solar problems show up. If monitoring drops out, production changes suddenly or fault codes keep appearing, it is worth having the system checked. Catching inverter issues early can help protect solar performance, safety and long-term savings.

Before Booking An Assessment

✓

Check the inverter screen or app for error messages, warnings or unusual production drops.

✓

Note when the issue started and whether it happens at certain times of day.

✓

Compare recent solar output with previous days, months or similar weather conditions.

✓

Avoid opening electrical equipment yourself. Solar systems should only be inspected by qualified professionals.

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What our customers say

“I am saving money with my panels, I’m very excited to say. The quoting process was so easy, and no pressure. Price-wise they were the most competitive, and not only are the panels and inverters great and really high-quality, but the team was so great to work with that I have no hesitation in recommending them.”

— Kavina

“The speed that they got a quote to me – and had the system erected – was super-fast. They were straight to the point, legitimate; I could get them on the phone, and not beat around the bush with a salesperson. They were polite and enjoyable to have around. Get Stag to do it – I’d recommend them any day of the week.”

— Ian

“The enquiry and quoting process was very easy. We were very happy with [the quote] and accepted it straight away. We’re saving a lot of money with the solar panels. The total experience with Stag was one that left us feeling very good, very satisfied, and we’d be happy to recommend them to anyone – I don’t think you could do any better.”

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Platinum Warranty Package

We pride ourselves on delivering exceptional products and services, which is why we offer our comprehensive 25-year Platinum Warranty. This industry-leading warranty goes above and beyond standard workmanship warranties, covering various components not typically included in manufacturer warranties.

With our Platinum Warranty, you can rest assured that your solar investment is well protected, giving you complete peace of mind as you enjoy the benefits of clean, renewable energy.

Workmanship (lifetime)*

Broken Tiles Repaired/Replaced*

Property Damage*

Wiring & Conduits

AC & DC Isolators

Excessive Broken Tiles*

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Express Warranty Claims

Any At-Fault Damage Not Under Warranty

Racking, Railing, Brackets, and Clamps

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Frequently Asked Questions: Solar Inverters

Talk to a Verified Installer No pressure! Just expert advice

What Does A Solar Inverter Do?

A solar inverter converts the DC electricity produced by solar panels into AC electricity that can be used by your home. It also helps manage energy flow, monitor system performance and detect potential faults.

Do Solar Panels Need An Inverter?

Yes. Solar panels produce DC power, but most Australian homes use AC power. An inverter is needed to convert solar energy into electricity your appliances, lighting and household devices can safely use.

What Is The Difference Between A Solar Inverter And A Battery?

A solar inverter converts and manages electricity, while a solar battery stores excess solar energy for later use. The inverter is essential for most solar systems, while a battery is an optional upgrade.

What Type Of Solar Inverter Is Best?

The best inverter depends on your roof layout, shading, budget and future plans. String inverters suit many standard homes, hybrid inverters are useful for battery-ready systems, and microinverters or optimisers may suit complex or shaded roofs.

How Long Do Solar Inverters Last?

Many string and hybrid inverters last around 10 to 15 years, while microinverters may last longer. Lifespan can vary depending on brand, installation quality, heat exposure, maintenance and system design.

When Should I Upgrade My Solar Inverter?

You may need to upgrade your inverter if it is over 10 years old, showing frequent fault codes, no longer monitoring properly, limiting system expansion or not compatible with battery storage.

Can I Add A Battery To My Existing Inverter?

It depends on the inverter type and system design. Some existing systems can support battery storage, while others may require a hybrid inverter or additional equipment to become battery compatible.

Why Is My Solar Inverter Showing An Error Code?

Inverter error codes can be caused by grid voltage issues, communication problems, system faults, shutdowns or internal inverter issues. If errors continue, the system should be inspected by a qualified professional.

Why Is My Solar Inverter Not Producing Power?

No power output may be caused by a grid outage, inverter shutdown, electrical fault, isolation issue or system protection mode. It is best to have the system checked if production does not return to normal.

Can A Solar Inverter Support EV Charging?

Some modern solar systems can be designed with EV charging in mind. If you plan to add an EV charger, your inverter, solar system size and household energy usage should be reviewed before installation.

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