Is solar worth it in Tasmania?

Why we usually recommend 13kW, not 6.6kW

6.6kW used to be the default, but for most Tasmanian homes we now point to around a 13kW system — about 13.3kW of panels on a 10kW inverter. Tasmania allows up to a 10kW inverter on a single-phase connection without export limits, so you don't need three-phase power to do it. Our cool climate also keeps panels running efficiently.

• A 13kW system in Hobart generates around 15,330 kWh a year (~42 kWh a day) — close to double a 6.6kW system's ~8,300 kWh.
• It needs roughly 50–60 m² of roof (30–35 panels) and costs about $10,000–$15,000 after the STC rebate, versus ~$5,500–$8,500 for 6.6kW.
• Pairing 13.3kW of panels with a 10kW inverter (the CEC's 133% rule) means a touch of midday "clipping", but more power in the mornings, afternoons and on cloudy days — where Tasmania spends much of its time.

What it costs — and when it pays back

After the STC discount, a 13kW system runs roughly $10,000–$15,000 and typically pays for itself in about 4–6 years, then keeps saving for the 20+ year life of the panels — provided you use the power. The return comes mostly from not buying grid power at 25–29 c/kWh, which is why self-consumption beats exporting at 8.782 c.

Why size up — even if 6.6kW would cover today

Homes are electrifying fast, and a 13kW system is built for where you're heading:

• Going all-electric — heat pumps and induction cooking replace gas and lift your power use.
• An EV adds roughly 2,500–3,000 kWh a year — a 13kW system can charge it from the sun for next to nothing.
• A battery needs plenty of surplus to fill; 13kW provides it, so you can run the evening peak off your own solar.
• Bigger households (pool, ducted heating, more people) cover more of their daytime load.

Adding a battery

A battery lifts self-consumption further by storing daytime solar for the evening peak. It adds cost, so the battery portion's payback typically runs 7–12 years — though the federal Cheaper Home Batteries Program and rising bills can shorten that. A common path is a generous 13kW solar system now, battery next.

When solar might NOT be worth it (yet)

• Heavily shaded or small/awkward roofs with little usable north-facing area.
• Very low usage and no plans for a battery, EV or going all-electric — then even a big system mostly exports at 8.782 c/kWh, and a smaller one may suit. We'll tell you honestly.
• You’re about to move or re-roof — wait and do it once.

These are general 2026 figures (sources: Clean Energy Regulator, Tasmanian Economic Regulator, Aurora Energy, industry data). A proper quote on your roof and bill is the only way to know your real payback.