Wynnum Solar Upgrade: From 1.76kW to 10kW New System

Most people don't think about their solar panels until something goes wrong. For this Wynnum family, the sign was right there on the roof — scratched, worn panels that had been working harder than they should for years.

We removed their old 1.76kW system last week and installed a brand new 10kW setup. Here's what the job involved and what it means for their power bills going forward.

The Problem: Scratched Panels and a System Past Its Prime

The old system had done its job but it was time to go.

Scratches on solar panels aren't just cosmetic. Every scratch, chip, or mark on the panel surface interferes with how light reaches the solar cells underneath. The more damage on the glass, the less energy your system produces — and older budget panels were more prone to this kind of surface wear than what's available today.

When we inspected the existing setup, it was clear the panels had lost significant efficiency. Combined with the age of the system and the family's growing energy needs, keeping the old 1.76kW system running didn't make sense anymore.

What We Installed

We replaced the old system with:

• 22 × 475W solar panels — high-efficiency monocrystalline panels

• New inverter — matched to the upgraded system size

• Total system size: 10kW

The new panels are installed clean, correctly positioned, and built to current Australian standards. No scratches, no degraded cells — just a fresh system designed to last.

The Difference Between 1.76kW and 10kW

Here's where it gets interesting.

A 1.76kW system was a reasonable starting point when smaller systems were the norm — but it was never going to keep up with a modern household. An average Brisbane home uses between 15 and 25 kWh per day. A 1.76kW system in Queensland might generate around 7–8 kWh on a good day.

A 10kW system? On a clear Brisbane day, that same household could generate 35–40 kWh — enough to cover most of their daily use and push the excess back to the grid.

That's not a small improvement. That's a completely different relationship with your power bill.

Signs Your Solar System Might Be Due for an Upgrade

This Wynnum job is a good reminder that solar panels don't last forever — and an ageing system can quietly cost you more than you realise.

It's worth getting your system looked at if:

• Your panels are 10–15 years old or more

• You've noticed scratches, discolouration, or physical damage on the panels

• Your power bills have crept back up despite having solar

• Your household's energy use has grown (EV, pool pump, more people at home)

• Your inverter has started throwing error codes or shutting down

• 
  

Regular solar panel maintenance even just an annual check can catch these issues before they cost you. And if the system has passed its useful life, replacing it now means you stop losing money on an underperforming setup.

If your solar system is getting on in years — or if you're not sure whether it's still performing the way it should — we're happy to take a look.

DJ Edwards Solar & Electrical is a CEC-accredited solar energy company based in Brisbane, with 25 years of experience and a team that does every job themselves no subcontractors.

Call us on 0400 571 610 or get in touch online to book a solar inspection for your home. We'll give you a straight answer on whether your system still has life in it, or whether an upgrade makes sense.