The Solar Comeback: Why Are Electricity Bills Returning After 8–10 Years?

Eight years ago, when the Johnson family first installed solar panels on their Adelaide home, it felt like a small revolution. Their monthly bills shrank to nearly nothing. They basked in the sunshine, knowing their system was so well-sized and efficient that they barely paid a cent to the grid. Friends and neighbours were jealous. They thought they had cracked the code on energy costs forever.

But now, almost a decade later, something’s changed.

Mrs Johnson opened her latest electricity bill and blinked twice. “How can this be a $150 monthly bill?” she asked. “We’re still using mostly solar!”

If this sounds familiar, you’re not alone. Many solar owners who were feeling invincible a few years ago are now scratching their heads — and paying again.

Let’s unpack why that’s happening — in a way that actually makes sense — and show some real data to help you connect the dots.

1️⃣ Increased Electricity Usage (The Most Common Reason)

Life in 2016 looks very different to life today.

Over the years, households have added:

• Reverse-cycle air conditioning

• Pool pumps

• Larger fridges

• Home offices

• Electric vehicles

• Extra family members

  
  

Even if your solar system is producing the same amount of energy, your household may be using much more than it did when the system was first designed.

Back then, your solar may have covered 90–100% of your usage. Today, it might only be covering 60–70%.

That gap? It comes from the grid — and grid power isn’t cheap.

2️⃣ Feed-in Tariffs Have Dropped Dramatically

When many systems were installed around 2010–2016, feed-in tariffs were generous. Some homeowners received 44–60¢ per kWh for exported solar.

Now look at 2025 average figures:

Year	NSW	VIC	QLD	SA
2010	60¢	60¢	44¢	44¢
2015	7¢	25¢	10¢	6.8¢
2021	6¢	6.7¢	8¢	6.8¢
2025	3¢	1¢	2¢	2¢

In some areas, exported solar is now worth as little as 1–3 cents per kWh.

Meanwhile…

3️⃣ Electricity Prices Have Increased Significantly

Current residential rates (approximate averages):

• NSW: 44.11¢ per kWh

• VIC (Peak): 38.37¢ per kWh

• SA (General Usage): 50.97¢ per kWh

• QLD (Peak): 49.99¢ per kWh

  
  

In South Australia and Queensland peak periods, power is close to 50 cents per kWh.

So the gap now looks like this:

• Export solar → earn 1–3¢

• Buy electricity → pay 38–51¢

  
  

That’s a massive difference.

Even a small increase in grid usage now creates noticeable bills.

4️⃣ Solar Systems Naturally Age

Solar panels don’t suddenly fail — but they do slowly decline.

After 8–10 years:

• Panels may produce 5–10% less than original output

• Inverters may be approaching replacement age

• Dust, weather exposure and heat reduce efficiency

  
  

If your usage has increased while output has slightly declined, your reliance on grid electricity naturally grows.

🔎 What’s Driving 2026 Electricity Prices?

Estimates show electricity costs could rise by around ~20–24% in 2026 compared with previous levels as subsidies end and raw costs flow through to consumers. For the average household, that could mean hundreds of dollars more per year.

Beyond your own solar system, broader market forces are also influencing bills.

Here are the key factors affecting 2026 prices:

🔹 End of Government Subsidies

Energy bill rebates that helped keep costs down for many households finished at the end of 2025.

Without these rebates, households are facing noticeable increases from late 2025 into 2026 — even if their actual electricity usage hasn’t changed.

🔹 Wholesale Market Dynamics

Wholesale electricity prices in the National Electricity Market (NEM) can be highly volatile.

In late 2025, short-term price events exceeded $5,000 per MWh during periods of high demand and limited generation availability.

While these spikes don’t immediately show up on your bill, sustained volatility can feed into retail pricing structures over time.

🔹 Renewable Energy Growth

Australia’s renewable generation continues to grow rapidly.

In Q4 2025, renewables supplied over 50% of electricity in the NEM. When renewable output is strong, it places downward pressure on wholesale prices.

However, while this helps stabilise the market long term, the immediate impact on 2026 retail bills is softened by:

• Removal of subsidies

• Network cost increases

• Retail pricing adjustments

  
  

🔹 Inflation & Network Costs

Electricity bills aren’t just about generation.

A large portion of your bill goes toward:

• Poles and wires

• Transmission infrastructure

• Maintenance and upgrades

  
  

These network costs generally rise over time and continue to apply upward pressure on retail electricity prices.

🔹 Global Energy Markets

Geopolitical events affecting global gas and oil markets — such as tensions in the Middle East — can influence Australian gas prices.

Gas-fired generation still plays a key role in the electricity mix, particularly during winter peaks. When global gas prices rise, electricity prices often follow.

📊 The Big Picture

What we’re seeing in 2026 is the result of multiple forces working together:

• 🔻 Feed-in tariffs have dropped to 1–3¢

• 🔺 Retail electricity rates are 38–51¢ per kWh

• 📈 Government rebates have ended

• ⚡ Wholesale volatility remains

• 🏗 Network costs continue rising

  
  

Your solar system didn’t suddenly stop working.

The energy market evolved.

Is Solar Still Worth It?

Absolutely.

But savings today depend on strategy:

✅ Increase daytime self-consumption ✅ Shift usage to solar hours ✅ Consider adding a battery ✅ Review your electricity plan regularly

For homeowners who installed solar 8–10 years ago, this isn’t the end of savings.

It’s simply the next stage of the solar journey.