Solar inverter replacement in Traralgon

When a solar inverter starts throwing error codes or stops producing on sunny days, the usual fix is to replace it, either with a similar string inverter or with a hybrid model that can run a battery later. The choice comes down to the age of the rest of the system and whether a battery is likely in the next few years. A local electrical business that holds the licence quotes and carries out the replacement once you enquire; this site’s part ends at the referral, as the about page describes.

How do I know my inverter is failing?

Why Solar names inverter failure as the most common solar fault, and lists the symptoms (Why Solar repair guide):

• Error or fault codes on the screen or in the monitoring app.
• Flashing red lights or a red status light that does not clear.
• No output on a clear, sunny day.
• The inverter switching itself off during the day.

There is also a quieter sign. Energy Matters says an ageing inverter can produce 10 to 15% less before it fails outright, so a slow slide in output over a year or two can point to the inverter rather than the panels (Energy Matters on inverter replacement). Compare your generation with the same month in earlier years before deciding.

Not every fault means a new inverter. A tripped isolator, a loose connection or a wiring fault can produce the same symptoms, and those are covered on the solar repairs page. A good provider rules them out before quoting a replacement.

How long does a solar inverter last?

Why Solar puts the typical life of a string inverter at 5 to 12 years, which means most systems will need at least one replacement over the life of the panels. So a dead inverter on a system with sound panels is a maintenance item. It does not mean the whole system has reached the end of its life.

Should I replace like for like or upgrade to a hybrid?

Option	What it suits	Energy Matters price band (5 to 6.6 kW system)
Like for like string inverter	Panels are in good shape, no battery planned, you want the cheapest return to full output	$1,500 to $3,000
Hybrid inverter (battery ready)	You expect to add a battery, or you want the option of backup later	$2,500 to $4,500

A hybrid unit costs more now, but it can save fitting a second inverter if a battery goes in later. If a battery is a real prospect, the home battery installation page explains how an existing hybrid inverter changes that job. If it is unlikely, a like for like swap is usually the sensible choice. The Traralgon cost guide places these bands next to the rest of the site’s figures.

Questions that help decide:

1. How old are the panels, and are any damaged or underperforming?
2. Is the existing inverter undersized or oversized for the panels on the roof?
3. Will a battery go in within five years or so?
4. Do you want the house to keep some power during outages?

If you are unsure which way to go, add your answers to a solar inverter enquiry and a provider can quote both options.

What happens if my installer has gone out of business?

This is common. Energy Matters, citing CHOICE, puts the number of orphaned solar systems at about 600,000, roughly 31% of the 1.9 million installed, and notes more than 700 solar companies have closed since 2011, a figure from the Consumer Action Law Centre.

If the business that sold your system has closed, there is no retailer to lodge a warranty claim through. Before paying for a replacement, ask the provider to:

• Read the serial number and installation date from the inverter label.
• Check whether the inverter manufacturer still trades in Australia and accepts claims directly from owners.
• Tell you whether the fault looks covered, and what a manufacturer claim would involve.

Ask what manufacturer warranty comes with the replacement and who you would claim through if it fails, and keep the paperwork with your Certificate of Electrical Safety.

What does the network require of a new inverter?

On AusNet’s network, which covers Traralgon, a new inverter on a system under 30 kW must be on AusNet’s approved inverter list, support emergency backstop through a CSIP-Aus compliant connection, and have volt-var and volt-watt response settings turned on (AusNet connections up to 30 kW). Without an internet connection the inverter cannot receive backstop signals, so ask the provider how that will be handled at your address. The AusNet export limits guide explains what backstop and the export limit mean in practice.

The inverter must also meet AS/NZS 4777.2, the standard for grid connected inverters, and be on the Clean Energy Council approved list. Swapping an inverter counts as electrical work under the Electricity Safety Act 1998. Only a licensed electrician may disconnect the old unit and wire in the new one, and once the swap is complete the owner is entitled to a copy of the safety certificate covering it.

Two things are worth checking on the quote itself. First, whether the price includes reconnecting monitoring and setting up the app on your phone, since some quotes treat that as an extra. Second, whether the manufacturer expects the new unit to be registered for warranty, and whether the provider or you will do that.

How long does an inverter swap take?

Why Solar says a straightforward swap takes 2 to 4 hours. Allow a full day if the job is a hybrid inverter or includes a battery, because there is more wiring and more commissioning. The steps usually run in this order:

1. Shut the system down using the displayed procedure and confirm it is isolated.
2. Remove the old inverter and check the DC and AC cabling, isolators and mounting.
3. Mount the new inverter, connect it and set the network settings AusNet requires.
4. Connect monitoring to your home internet so backstop and reporting work.
5. Test and commission, then show you the new screen or app.
6. Arrange the paperwork, including your certificate.

Where should the new inverter go?

Usually in the same place as the old one, but a replacement is a good moment to ask whether that spot is right. Energy Safe Victoria advises keeping wood piles, paint and flammable liquids away from inverters and batteries. Ask whether the new unit needs more clearance than the old one, and whether the cable run allows for a battery next to it later.

Which local systems are due for a new inverter?

If your system went on in the early rebate years, check the installation date on the inverter label against the 5 to 12 year range above. Owners across the Valley run into the same choice, and the Morwell area page looks at what is different there.

Next step: details that speed up an inverter quote

Before you book an inverter replacement quote, gather:

• A clear photo of the inverter label showing the brand, model and serial number.
• A photo of the screen, and the exact error code if one is shown.
• The age of the system, from your paperwork or the installation date on the label.
• Whether you want like for like or a hybrid, and your suburb.

Send a job enquiry