Maximising Self-Consumption: The Real Key to Solar Savings Explained Simply

Going solar in Tasmania is a little different from the mainland. Our power is relatively affordable, our sunshine is modest, and our regulated feed-in tariff — 9.276 c/kWh from 1 July 2026, up from about 8.9 c — sits well below the roughly 28–30 c/kWh most households pay for grid power. That gap is the whole story: the real savings from solar come from using your own power, not selling it. This guide explains how to make that work for your home.

What is self-consumption, and why does it matter in Tasmania?

Self-consumption simply means using the electricity your panels generate, in your own home, at the moment it’s made. Every unit you use yourself avoids buying power at around 28–30 c/kWh, while every unit you export earns only the modest feed-in tariff — so the power you use yourself can be worth roughly three times the power you sell.

That’s why the old mindset of “sell power back to the grid” doesn’t stack up here. The households who save the most are the ones who shape their day around their sunshine.

How much better is using solar than exporting it?

Here’s the basic maths every Tasmanian solar owner should understand:

What happens to a unit of solar	Approximate value to you
You use it in your home	Avoids ~28–30 c/kWh of grid imports
You export it to the grid	Earns the 9.276 c/kWh regulated feed-in tariff (from 1 July 2026)
You store it in a battery for later	Avoids grid imports later, minus some round-trip losses

The exact benefit depends on your own tariff, usage pattern and system, but the principle holds everywhere: shifting one unit of consumption into daylight hours is generally worth far more than exporting it.

How can I use more of my own solar power?

The good news is that lifting self-consumption rarely requires new gadgets — mostly it’s timing. Practical moves that suit Tasmanian homes include:

Run the dishwasher, washing machine and dryer late morning to mid-afternoon, when panels are producing. Most modern appliances have delay-start timers.
Put your hot water on a timer or solar diverter. An electric hot water cylinder is effectively a thermal battery — heating it with solar can soak up a big chunk of surplus.
Pre-heat or pre-cool with your heat pump while the sun’s out, rather than fighting the evening chill on grid power.
Charge an EV during the day when you can, even at lower amps — daytime charging is where an EV and solar really sing together.
Cook with induction or the oven earlier where life allows, and stagger big loads so they don’t all run at once and spill back onto the grid.

Even shifting a few of these habits can meaningfully change how much of your solar you keep.

What size solar system should a Tasmanian home get?

For most homes planning to electrify over time — an EV, a heat pump, induction cooking — a system of around 13 kW of panels on a 10 kW inverter has become the sensible default, replacing the old 6.6 kW standard. This uses the 133% inverter oversizing rule, and because TasNetworks allows a 10 kW inverter on single-phase in Tasmania, most homes don’t need an expensive three-phase upgrade.

A larger system costs more upfront, but the federal STC rebate under the Small-scale Renewable Energy Scheme discounts the cost (Tasmania sits in STC Zone 4), and extra panel capacity keeps paying off as your home electrifies. Panels are the cheap part of a system; labour, scaffolding and the inverter are not — so sizing up once is often smarter than expanding later.

Honesty check: a larger system is not automatically right for everyone. If your household uses very little power, has no battery, EV or electrification plans, and is out most days, a smaller system may suit you better. The right size depends on your usage, roof, budget and plans — not a one-size-fits-all number.

Is a home battery worth it in Tasmania?

A battery can make sense in Tasmania, but it usually pays back more slowly here than on the mainland — our relatively cheap grid power and fair feed-in tariff mean the gap a battery works against is smaller. For a typical household on a standard Aurora tariff, a battery’s value is mostly extra self-consumption plus blackout backup, rather than a quick financial win.

A few useful things to know:

The federal Cheaper Home Batteries Program (from 1 July 2025) takes roughly 30% off an eligible battery — around $250 per usable kWh at the full 2026 rate for the first 14 kWh, stepping down for larger capacities (up to a 50 kWh cap). The discount tapers each year to 2030, the battery must be paired with solar, and eligibility is subject to the program’s rules.
There is no separate Tasmanian state battery rebate.
No vendor or retail VPP program currently operates in Tasmania. However, spot-price-passthrough retailing does exist, and automated battery control can charge when wholesale prices go negative and avoid peak imports — an approach Solar Generation runs on its own systems.
A rough rule of thumb is that the battery portion of a system may take somewhere in the 7–12 year range to pay back, versus solar panels alone — though this varies widely with your tariff, usage and how the battery is controlled.

If blackout protection matters to you — storms, rural fringes, medical equipment — a battery can be worth it for resilience alone. Just go in with clear eyes about the payback.

How long does solar take to pay for itself in Tasmania?

A commonly cited rule of thumb is that solar panels alone may pay back in roughly four to six years for many Tasmanian households, with batteries taking longer. That’s a general guide, not a promise — your actual payback depends on your system cost, tariff, self-consumption rate and how your usage evolves.

The single biggest lever you control is that self-consumption rate. Two identical systems on identical roofs can deliver very different results depending on whether the household runs its life on sunshine or on the evening peak.

The takeaway

In Tasmania, solar rewards the household that uses what it makes. Get the sizing right for where your home is heading, shift your big loads into daylight, treat exports as a bonus rather than the plan, and weigh a battery on self-consumption and backup value rather than hype. Do that, and the savings tend to look after themselves.

This guide is written by the Tasmanian solar team at Solar Generation Tasmania as a free community resource — if you’re ever puzzling over your own setup, we’re always happy to help answer questions.

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Published by Solar Generation Tasmania. General information current as at publication — rebates, tariffs and prices change, so confirm current figures before deciding.