The "Sun Tax" Is Here — But It's Not What the Headlines Want You to Think

If you've got solar panels, you've probably heard the term "sun tax" thrown around. It sounds ominous — like the government is about to start charging you for daring to own panels.

Here's the short version: yes, some solar owners in NSW and SA are now paying a small network charge for exporting power during the middle of the day. But for the typical household, we're talking about **six to fourteen dollars a year**. The name is dramatically worse than the reality.

Let's unpack what's actually happening, state by state.

What actually is the "sun tax"?

It's not a government tax at all. The official name is two-way pricing — a network tariff reform approved by the Australian Energy Market Commission (AEMC) back in August 2021.

The problem it's trying to solve is real: Australia has the highest rooftop solar uptake in the world. On sunny days, the grid gets absolutely flooded with solar exports between 10am and 3pm. Too much supply, not enough demand. That causes voltage instability, forces the network operator to curtail (switch off) solar systems, and pushes up infrastructure costs for everyone.

The solution: a small stick and a small carrot.

• **Stick**: A charge of ~1.2 cents per kilowatt-hour for exports during the midday glut (10am–3pm)
• **Carrot**: A reward of ~2.3 c/kWh for exports during the evening peak (4pm–9pm), when the grid actually needs power
• **Safety net**: A free export threshold — roughly 6.4–6.8 kWh per day (192–212 kWh per month) — below which you're not charged anything

The idea is to nudge solar owners toward self-consuming their power at midday (run the dishwasher, charge the EV, heat the water) and exporting later when it's valuable.

State-by-state: where does it apply?

If you're in VIC, QLD, or TAS: you can stop reading now. This doesn't affect you.

What does it actually cost?

Ausgrid's own modelling says a typical 5kW solar household will see an annual bill impact of $6.60. EcoFlow's analysis puts it at $6–$14 per year. For context, that's roughly the cost of one takeaway coffee.

Even for larger systems (10kW+), the impact tops out around $30–50/year — still a rounding error compared to the $800–$1,500 a typical solar household saves annually by avoiding grid electricity.

The free threshold does most of the heavy lifting. If you export less than ~192 kWh per month during the charge window — which most 5kW systems don't exceed — you pay nothing.

Why the headlines are worse than the bill

The "sun tax" label is masterful clickbait but terrible consumer information. It implies: - A new government tax (wrong — it's a network pricing reform) - That solar is suddenly being punished (wrong — the numbers are tiny) - That solar owners are being singled out (half-right — but non-solar households have been paying for grid infrastructure all along)

The real story isn't the sun tax. It's that feed-in tariffs have been falling for a decade, from the glory days of 44–60c/kWh premium FiTs to today's 0–10c/kWh. That decline has already happened. The sun tax is a rounding error on top of it.

What should solar owners actually do?

1. Self-consume more at midday Run your dishwasher, washing machine, pool pump, and EV charger between 10am and 3pm. Every kWh you use yourself is a kWh you don't buy from the grid at 25–40c/kWh — that's where the real savings live.

2. Consider a battery — but do the maths first A battery lets you store midday solar and use it in the evening, avoiding both the export charge AND peak grid prices. The federal Cheaper Home Batteries Program offers roughly $311 per kWh of usable battery capacity — about $3,000 off a 10kWh battery. But even with the rebate, batteries have 7–10 year payback periods for most households. They're a long-term play, not a knee-jerk reaction to a $6 charge.

3. Compare your energy plan regularly This is the one most people miss. **How your retailer handles the two-way tariff matters.** Some may reduce your headline feed-in tariff to absorb the network charge. Others may pass it through as a separate line item. Some might not pass it through at all.

The difference between the best and worst solar plan in your area can be $200–$400 a year — orders of magnitude more than the sun tax itself.

4. Don't let the "tax" talk you out of solar If someone tells you "solar isn't worth it anymore because of the sun tax," they're either misinformed or selling something. Solar is still one of the best household investments in Australia. A 6.6kW system in Sydney pays for itself in 3–5 years and generates tax-free savings for 20+ years beyond that. A $6.60 annual charge doesn't change that equation.

The bottom line

The sun tax is real, but it's been wildly overhyped. For the vast majority of solar households, the financial impact is somewhere between "negligible" and "didn't notice."

The bigger risk to your solar savings isn't a 1.2c export charge. It's sitting on a lazy energy plan with a terrible feed-in tariff, paying more than you need to for the grid electricity you still buy at night.

Compare. Switch. Repeat. That's been the advice for a decade — and the sun tax doesn't change it.