Solar and battery rebates in Cairns: what you can claim in 2026

Written and checked by the Energy Merchants desk · Reviewed 3 October 2026

This is the Cairns guide. For every scheme in the state, see the Queensland rebates guide.

Solar rebate in Cairns

Cairns shares Townsville’s zone 3 rating and cyclone exposure, but with a wetter climate and a rooftop market tied to tourism, rentals and tropical weather. The zone rating, not the rainfall, decides the certificate count.

Cairns (postcode 4870) is in STC zone 3, rated 1.382. Under the 5-year deeming period for 2026 installs, a 6.6 kW system earns 45 certificates (6.6 x 1.382 x 5, rounded down). At the roughly $38 to $40 spot range at the time of writing that is about $1,710 to $1,800 before any trader’s rate, and the deeming period falls to 4 years in 2027 and 1 year in 2030, with the scheme ending on 31 December 2030. Run your own size and postcode through the STC calculator, and confirm the zone for each street, since a few postcodes in Far North Queensland sit in different bands.

Battery rebate in Cairns

The federal Cheaper Home Batteries Program covers CEC-approved, VPP-capable batteries from 5 to 100 kWh usable, with up to 50 kWh eligible, one per property, on new or existing solar. The STC factor is 6.8 per kWh at the time of writing, stepping down to 5.7 on 1 January 2027 and 5.2 on 1 July 2027. Since 1 May 2026 the first 14 kWh earns 100% of the factor, 14 to 28 kWh earns 60% and 28 to 50 kWh earns 15%, so a 10 kWh battery earns 68 certificates and a bigger battery earns less per extra kilowatt-hour. Queensland’s Battery Booster is closed, so the federal discount is the only battery incentive open at the time of writing. Use the battery STC calculator and the battery STC pillar for the maths and the evidence rules.

What Queensland adds

Queensland has no live state solar or battery rebate at the time of writing. The Battery Booster closed to new applications in 2024 and has not been replaced, so any quote still showing a state battery line is out of date. For hot water, federal STCs apply to eligible heat pumps, and third-party sites list Queensland Government energy offers that we could not confirm, so check the Queensland Government’s energy pages before promising a state amount. The Queensland page holds the state detail. Federal STCs apply to eligible heat pump hot water. See the hot water STC page.

Network, export and approvals

Ergon Energy Network serves Cairns and Far North Queensland. Third-party guides report that a basic residential connection has a 5 kW per phase export limit, with dynamic connections able to export up to 10 kW per phase where offered. Ergon’s network opportunities map shows hosting capacity by feeder, and constraints vary by location, so confirm on the connection offer rather than assuming the standard limit.

Climate, roofs and typical systems

Cairns has a wet tropical climate: hot, humid and cloudy through the summer wet season, with a sunnier, drier winter. Cyclone loading is the first design issue, so mounting must suit the site’s wind region and photos should show the fixings. Humidity and salt corrode cheap hardware, so stainless or coated components are worth the extra. Roofs are largely steel sheet on elevated timber and modern slab homes, and shading from mature tropical trees is common in older suburbs such as Edge Hill and Bayview Heights. Typical systems run 6.6 kW to 10 kW. Because wet-season cloud cuts output, customers looking at a battery should ask for a realistic estimate of winter and summer self-supply.

Local and council programs

We did not find a Cairns Regional Council rebate on solar or batteries that we could confirm at the time of writing. Check the council’s current offers, and do not promise a local amount without evidence.

Timing a job in Cairns

Customers weighing this year against next should know the solar deeming period steps down to 4 years in 2027 and the battery factor drops to 5.7 on 1 January 2027 and to 5.2 on 1 July 2027, so a pre-wet-season install earns more than the same system installed after the new year. The January 2027 explainer covers what changes, and the installer guide to the battery program covers the paperwork. For the mechanism behind certificates, see the STC trading pillar, and for the wider picture start at the rebates hub.

Nearby pages

For the capital, see the Brisbane page; for Queensland’s other northern centres, see Townsville and Mackay. For the state rules, see the Queensland page.