Frequently Asked Questions

The Cheaper Home Batteries Program has run since 1 July 2025. The discount comes through small-scale technology certificates (STCs), which your installer applies to your quote so you pay less upfront.

Since 1 May 2026 the full certificate rate applies to the first 14kWh of usable capacity, 60% of it to the next 14kWh (up to 28kWh) and 15% of it from 28kWh to 50kWh. The certificate factor is 6.8 per kWh for installs from May to December 2026, then 5.7 from 1 January 2027 and 5.2 from 1 July 2027. The discount keeps stepping down until the program ends in 2030.

Eligible batteries are between 5kWh and 100kWh and must be approved products fitted by an accredited installer. Other conditions apply, so we check them against your home during your Energy Assessment.

Queensland’s own Battery Booster scheme closed once its funding was allocated, and no replacement has been announced.

Other states differ. New South Wales has replaced its battery rebate with a Virtual Power Plant (VPP) incentive with no fixed dollar amount. Western Australia offers a state rebate of up to $1,300 for Synergy customers and up to $3,800 for Horizon Power customers. Tasmania has no state battery rebate that we could confirm. The federal program applies in all four states.

Figures checked in November 2026 against the Clean Energy Regulator and industry price data. Rebates and prices change, so we confirm current amounts when we quote.

Book a free Energy Assessment and we will work this out for your home.

The old NSW battery installation rebate ended on 30 June 2025. Since 1 July 2025 the state incentive is paid through the NSW Peak Demand Reduction Scheme when you connect an eligible battery to a Virtual Power Plant.

NSW does not publish a fixed dollar amount. It depends on your VPP provider and contract, it is paid on the first 28kWh of usable capacity, and it is a one-off payment for each electricity meter. From 1 July 2026 batteries up to 50kWh are eligible.

The federal Cheaper Home Batteries Program also applies in NSW, and the two can be combined for new installs, but the rules are detailed so we check them for your home during your Energy Assessment.

Compared with Queensland, which has no state battery rebate at the moment, NSW adds a state incentive, but it comes with a VPP commitment.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Book a free Energy Assessment and we will work this out for your home.

The WA Residential Battery Scheme had applications open as of October 2026 and runs until the planned 100,000 rebates are used. The caps are based on 10kWh of usable capacity, and larger batteries receive the same maximum.

To qualify the battery must be new and on the approved list for your area, it must be installed by an accredited installer, and you must commit to a Virtual Power Plant (VPP) product offered by your retailer.

Eligible households with a combined income under $210,000 can also apply for an interest-free loan of up to $10,000, repaid over up to 10 years.

Compared with Queensland, which has no state battery rebate at the moment, WA currently offers one, with a VPP commitment.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Book a free Energy Assessment and we will work this out for your home.

The federal program works the same way in Tasmania as elsewhere. The discount comes through small-scale technology certificates (STCs), which your installer applies to your quote so you pay less upfront. The certificate factor falls from 6.8 to 5.7 per kWh on 1 January 2027.

Tasmania does not currently run a state rebate or loan for home solar or batteries. State programs come and go, so we check before you buy.

The regulated minimum feed-in tariff in Tasmania is 9.276c/kWh for 2026-27, and retailers can offer more, which matters when you decide how much solar to store or export.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Book a free Energy Assessment and we will work this out for your home.

Eligible rooftop systems up to 100kW earn STCs, and the same rules apply in Brisbane, the Gold Coast and regional Queensland. The number of certificates depends on your system size, your postcode’s solar zone and the deeming period. The deeming period is 5 years for 2026 installs and 4 years for 2027, so the discount drops each 1 January.

The dollar figures above are SolarQuotes estimates for a typical 6.6kW system. Certificate prices move, so your actual discount may differ.

Landlords may also be able to claim up to $3,500 through the Queensland Government’s Solar for Renters program, if they meet its conditions.

The federal discount works the same way in New South Wales, Western Australia and Tasmania, but your solar zone changes the certificate count. Brisbane, Sydney and Perth are zone 3 (rating 1.382), Mount Isa is zone 2 (1.536) and Hobart is zone 4 (1.185), which earns about 14% fewer certificates than zone 3 for the same system.

Figures checked in November 2026 against the Clean Energy Regulator and industry price data. Rebates and prices change, so we confirm current amounts when we quote.

Book a free Energy Assessment and we will work this out for your home.

Eligible rooftop systems up to 100kW earn STCs. The number depends on your system size, your postcode’s solar zone and the deeming period, which is 5 years for 2026 installs and 4 years for 2027, so the discount drops each 1 January.

Sydney postcodes are in zone 3, the same rating as Brisbane. Other NSW postcodes can sit in a different zone, so your exact figure depends on where you live.

Compared with Queensland, the panel rebate works the same way. State differences are mainly in battery programs and feed-in rates.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Book a free Energy Assessment and we will work this out for your home.

Eligible rooftop systems up to 100kW earn STCs. The number depends on your system size, your postcode’s solar zone and the deeming period, which is 5 years for 2026 installs and 4 years for 2027, so the discount drops each 1 January.

Perth postcodes are in zone 3, and so is Kalgoorlie, the same rating as Brisbane. Other WA postcodes can sit in a different zone.

Compared with Queensland, the panel rebate works the same way. WA’s state support is for batteries rather than panels.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Book a free Energy Assessment and we will work this out for your home.

Eligible rooftop systems up to 100kW earn STCs. The number depends on your system size, your postcode’s solar zone and the deeming period, which is 5 years for 2026 installs and 4 years for 2027, so the discount drops each 1 January.

Hobart is in zone 4 (rating 1.185), while Brisbane, Sydney and Perth are in zone 3 (1.382). That means about 14% fewer certificates for the same size system, so the discount is smaller in Hobart.

Compared with Queensland, the scheme is the same, but the zone rating and the higher installed price in Hobart both change what you pay.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Book a free Energy Assessment and we will work this out for your home.

Solar panels: the federal Small-scale Renewable Energy Scheme discount, applied to your quote. Batteries: the federal Cheaper Home Batteries Program, because Queensland’s Battery Booster has closed.

Landlords: Solar for Renters offers up to $3,500, tiered by system size, and conditional approval is needed before installation.

Loans: we could not confirm a current Queensland Government solar loan. Check the Queensland Government website for anything new, or ask us.

Existing households: the 44 cent Solar Bonus has closed to new applicants.

Other states differ: New South Wales has a VPP battery incentive, Western Australia has a state battery rebate and an interest-free loan, and Tasmania has no state rebate or loan that we could confirm. See the questions for each state.

Figures checked in November 2026 against the Clean Energy Regulator and industry price data. Rebates and prices change, so we confirm current amounts when we quote.

Book a free Energy Assessment and we will work this out for your home.

Solar panels: the federal Small-scale Renewable Energy Scheme discount, applied to your quote. Batteries: the federal Cheaper Home Batteries Program, plus the NSW VPP incentive when you connect an eligible battery to a Virtual Power Plant.

Loans: NSW launched an interest-free Home Energy Saver loan of up to $15,000 for energy efficiency upgrades in June 2026. We could not confirm whether it covers solar or batteries, so check before you rely on it.

Hot water: NSW has offered a Hot Water Upgrade Incentive, but we could not confirm it is currently open.

Compared with Queensland, NSW adds a state battery incentive. Queensland has Solar for Renters for landlords.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Book a free Energy Assessment and we will work this out for your home.

Solar panels: the federal Small-scale Renewable Energy Scheme discount, applied to your quote. Batteries: the federal Cheaper Home Batteries Program, plus the WA Residential Battery Scheme rebate of up to $1,300 for Synergy customers or up to $3,800 for Horizon Power customers.

Loans: households with a combined income under $210,000 can apply for an interest-free loan of up to $10,000, repaid over up to 10 years.

The state battery scheme requires an approved battery, an accredited installer and a commitment to a Virtual Power Plant product from your retailer.

Compared with Queensland, WA has a state battery rebate and loan that Queensland does not currently offer.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Book a free Energy Assessment and we will work this out for your home.

Solar panels: the federal Small-scale Renewable Energy Scheme discount, applied to your quote. Batteries: the federal Cheaper Home Batteries Program.

Tasmania does not currently run a state rebate or loan for home solar or batteries. State programs come and go, so ask us for the latest before you buy.

Feed-in: the regulated minimum feed-in tariff is 9.276c/kWh for 2026-27, and retailers can offer more.

Compared with Queensland, Tasmania has no equivalent of Solar for Renters that we could confirm.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Book a free Energy Assessment and we will work this out for your home.

Under current rules the number of years counted in your certificate calculation (the deeming period) falls by one each year, from 5 in 2026 to 1 in 2030. From 1 January 2031, new systems receive no federal solar support.

Batteries follow a similar path. The certificate factor falls from 6.8 to 5.7 on 1 January 2027, then to 5.2 on 1 July 2027, and keeps stepping down until the program ends in 2030.

These are current settings and governments can change them, so treat any end date as a guide and confirm before you buy.

The same federal dates apply in New South Wales, Western Australia and Tasmania. State battery schemes run on their own timing, for example WA’s rebates are available until the planned 100,000 rebates are used, so check each one before you buy.

Figures checked in November 2026 against the Clean Energy Regulator and industry price data. Rebates and prices change, so we confirm current amounts when we quote.

Book a free Energy Assessment and we will work this out for your home.

When an eligible system is installed, small-scale technology certificates (STCs) are created. You can assign them to your installer in exchange for an upfront discount, or sell them yourself. Assigning them is the simpler option because the discount shows on your quote.

Nexa Solar offers customers a point-of-sale discount when they choose to assign their STCs to the company.

The value depends on your system size, your postcode’s solar zone, the installation year and the market price of certificates.

Book a free Energy Assessment and we will work this out for your home.

Eligible customers keep the 44 cent rate until the scheme concludes. Everyone else receives a feed-in tariff set by their electricity retailer.

Energex advises that increasing your inverter capacity beyond the originally approved size ends 44 cent eligibility, and a change to the account name can also remove it, except between spouses. If you are on the scheme, talk to Energex or Ergon before changing your system.

This was a Queensland scheme. Feed-in rates differ by state: Tasmania’s regulated minimum for 2026-27 is 9.276c/kWh. Check your retailer for what you are paid today.

These are indicative Brisbane prices after the STC discount, including GST, from industry pricing data for October 2026. Regional locations, steep or tile roofs, three-phase power and brand choices can all move the price.

As a rule of thumb, the 2026 rebate takes roughly $1,600 off a 6.6kW system.

Compare quotes on more than price. Check the panel and inverter brands, the warranties and what is included. We give a tailored quote after reviewing your power bill during your free Energy Assessment.

Prices differ by state. See the questions for New South Wales, Western Australia and Tasmania.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

Book a free Energy Assessment and we will work this out for your home.

These are indicative Sydney prices after the STC discount, including GST, based on installer offers in the Solar Choice price index for October 2026. Regional locations in New South Wales can cost more than Sydney. Steep or tile roofs, three-phase power and brand choices can all move the price.

Compare quotes on more than price. Check the panel and inverter brands, the warranties and what is included. We give a tailored quote after reviewing your power bill during your free Energy Assessment.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

Book a free Energy Assessment and we will work this out for your home.

These are indicative Perth prices after the STC discount, including GST, based on installer offers in the Solar Choice price index for October 2026. Regional and remote locations in Western Australia can cost more than Perth. Steep or tile roofs, three-phase power and brand choices can all move the price.

Compare quotes on more than price. Check the panel and inverter brands, the warranties and what is included. We give a tailored quote after reviewing your power bill during your free Energy Assessment.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

Book a free Energy Assessment and we will work this out for your home.

These are indicative Hobart prices after the STC discount, including GST, based on installer offers in the Solar Choice price index for October 2026. Hobart was the highest of the four capital cities in this data, and locations outside Hobart can cost more again. Steep or tile roofs, three-phase power and brand choices can all move the price.

Compare quotes on more than price. Check the panel and inverter brands, the warranties and what is included. We give a tailored quote after reviewing your power bill during your free Energy Assessment.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

Book a free Energy Assessment and we will work this out for your home.

That is a rough rule of thumb from October 2026 industry data, where a 10kW system costs a little under $1 per watt and smaller systems a little over.

A good quote lists the panels, inverter, mounting, installation, electrical work, grid connection paperwork and the STC discount as separate lines, so you can see what you are paying for.

Other states, using the same October 2026 index, a 10kW system works out to about $0.82 per watt in Perth, $0.88 in Sydney and $1.15 in Hobart after the rebate.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

Book a free Energy Assessment and we will work this out for your home.

A 6.6kW system is a very common size for Queensland homes. October 2026 pricing data puts 6kW at around $6,200 in Brisbane and $6,350 nationally after the STC discount. Published pricing is usually quoted for 6kW, so treat this as a guide.

Payback is commonly estimated at 3 to 7 years depending on your usage and tariffs.

Prices differ by state. For a 6kW system after the STC discount, the Solar Choice index for 1 October 2026 shows about $5,750 in Sydney, $5,030 in Perth and $6,950 in Hobart. A 6.6kW system costs a little more.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

Book a free Energy Assessment and we will work this out for your home.

A 10kW system suits larger homes, homes with high daytime use, pools, air conditioning or electric vehicles, and many businesses.

Network connection limits can cap the inverter or export size at your address, so the final design depends on your local network.

Other states, from the same October 2026 index: about $8,780 in Sydney, $8,240 in Perth and $11,460 in Hobart after the STC discount.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

Book a free Energy Assessment and we will work this out for your home.

A 13kW array is a large system, often chosen by bigger homes, farms and businesses. Network rules for inverter and export size vary by area, so we confirm what is allowed at your address before quoting.

Because the range is so wide, a single price would be misleading. A free Energy Assessment gives you a tailored figure.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

Book a free Energy Assessment and we will work this out for your home.

That figure comes from the roughly $1 per watt installed price in October 2026 industry data. It includes the inverter, mounting, labour and paperwork as well as the panel itself. Buying panels alone costs less but does not cover those parts.

Adding panels to an existing system is different, because the inverter and approvals matter. See the question on adding panels.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

String inverters for 5kW to 6.6kW systems typically cost around $1,000 to $2,500 for the unit, and installation, mounting and approvals add to that.

If you are on the 44 cent Solar Bonus, increasing your inverter capacity beyond the approved size ends eligibility, so check with Energex or Ergon first.

We review your existing system, inverter and switchboard during an assessment before recommending anything.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

Book a free Energy Assessment and we will work this out for your home.

That is the equipment price, before installation. Replacing a mid-life inverter is often quoted at around $1,500 to $4,000.

Inverters are typically warranted for 10 years and realistically last 12 to 15 years, while panels routinely last 25 to 30 years. Microinverters can carry longer warranties, which can avoid a mid-life replacement.

Prices are indicative, from industry data published in April 2026. Your quote may differ.

Most systems benefit from a clean every 6 to 12 months. Dusty, rural or agricultural areas may need a clean every 3 to 6 months, and bird-heavy or coastal sites about every 6 months.

Rain removes loose dust from angled panels but will not remove bird droppings, salt film or construction dust. Always use a licensed professional for roof work, and check your warranty for cleaning conditions.

Prices are indicative, from industry data published in February 2026.

That adds a typical 6kW to 6.6kW solar price after the STC discount (about $6,200 to $7,000) to a 10kWh battery after the federal rebate (about $7,400 to $12,400). It is a guide only.

The battery rebate falls on 1 January 2027, and prices vary by brand, so ask for a current quote.

The battery side changes by state. Western Australia adds a state rebate of up to $1,300 (Synergy) or $3,800 (Horizon Power), New South Wales pays a VPP incentive with no fixed amount, and Queensland and Tasmania have no state battery rebate that we could confirm.

Prices are a guide only, from industry data for September and October 2026, and include GST. Your final price may be higher or lower.

Book a free Energy Assessment and we will work this out for your home.

Installing a solar power system is one of the most effective ways to reduce your electricity costs, especially in Australia's sunny climate. The amount you can save depends on several factors unique to your home or business.

At Nexa Solar, we'll assess your energy usage and design a customised solar solution to help you maximise your savings.

Most of the value comes from using your own solar power instead of buying it from the grid. Export payments (feed-in tariffs) are low, so homes that use more power during the day get more from their system.

Industry estimates put typical payback at around 3 to 7 years. SolarQuotes says most systems pay for themselves in 4 to 7 years, and another industry estimate puts a 6.6kW system in Brisbane at 2 to 4 years. The range reflects different assumptions about usage and prices.

Our Energy Assessment reviews your power bill and any existing solar, so you see the numbers for your home before you decide.

Other states work differently. Prices, sun and feed-in rates all vary. After the rebate a 10kW system costs about $8,240 in Perth, $8,780 in Sydney and $11,460 in Hobart (Solar Choice, October 2026), and Tasmania’s regulated minimum feed-in tariff is 9.276c/kWh for 2026-27. A higher price or less sun tends to lengthen payback, so we run the numbers for your address and bill.

Book a free Energy Assessment and we will work this out for your home.

Payback is the point where your bill savings equal what you paid. It depends on the system price after the rebate, how much solar you use yourself, your tariffs and any rise in power prices.

Both estimates rely on assumptions about usage, tariffs and price. Your own bill is the best starting point.

State matters. A 10kW system costs about $8,240 in Perth and $11,460 in Hobart after the rebate (Solar Choice, October 2026), so a Hobart home needs more savings to cover its higher price. Sun hours and feed-in rates differ by state too.

Book a free Energy Assessment and we will work this out for your home.

Your savings depend on how much power you use, when you use it, your tariffs, your system size and your location.

Using electricity in daylight hours, for example running the pool pump, dishwasher or air conditioner at midday, lifts your savings. A battery lets you use more of your solar in the evening.

The Brisbane figure is not a guide for other states. Savings in New South Wales, Western Australia and Tasmania depend on local electricity prices, sunshine and feed-in rates. In Tasmania, for example, the regulated minimum feed-in tariff is 9.276c/kWh for 2026-27.

Book a free Energy Assessment and we will work this out for your home.

The study, Watt’s it Worth, compared more than six million homes with and without solar. It is a national figure rather than a Queensland one, and individual results vary with the market, the system and the home.

A rough method: in Queensland each kW of panels typically produces around 4kWh a day on average. Divide the kWh you want to cover each day by 4 to estimate the kW you need, then divide by the panel wattage.

Daytime use, roof space, shading and network limits all change the answer, which is why we work from your actual bill.

Sun hours differ by state. A 10kW system typically makes 31 to 47kWh a day across the Australian capitals, so the same home may need more panels in a less sunny state.

Book a free Energy Assessment and we will work this out for your home.

Look at your bill first. Higher daytime use justifies a bigger system, while low use or a small roof points smaller. Roofs facing north, east or west all work well.

If you plan to add a battery or an electric vehicle later, tell us so we can size the system for it.

Book a free Energy Assessment and we will work this out for your home.

To use any calculator you need your daily kWh from a recent bill, how much you use in the daytime, your roof area and shading, and your budget.

We collect these on the call, then confirm them at the home visit if it is suitable.

Book a free Energy Assessment and we will work this out for your home.

Panels only generate during daylight. To cover evening and overnight use you need a battery, and adding a battery does not make a home off-grid.

Going fully off-grid needs a purpose-designed system. We can talk through what is realistic for your home during an assessment.

Book a free Energy Assessment and we will work this out for your home.

That is unshaded roof, ideally facing north, east or west. Vents, skylights, chimneys, shading and roof edges reduce usable space, so the number that fits depends on your roof layout.

Book a free Energy Assessment and we will work this out for your home.

A panel’s watts rating is its peak power. The kWh it produces over a day depends on sun hours, season, shading, direction and heat. Output is higher in summer and lower in winter, and cloudy days produce less.

Output differs by state because sun hours differ. A 10kW system typically makes 31 to 47kWh a day across the Australian capitals, so a panel in a sunnier city makes more than one in a less sunny city.

Panel sizes vary a little by brand, so check the datasheet for the exact model. Higher-wattage panels usually come from better efficiency rather than a much bigger panel.

A battery stores solar you would otherwise export at a low rate, so you can use it in the evening. The federal rebate takes roughly 30% off the upfront cost, but the rebate falls on 1 January 2027. Panels are generally the faster payback, while a battery is often more about evening use and backup.

Other reasons people buy: backup (which needs the right equipment), more energy independence and protection from rising prices. Adding a battery does not make a home off-grid.

We review your bill and usage pattern during an assessment so you can see whether a battery adds value for you.

Figures checked in November 2026 against the Clean Energy Regulator and industry price data. Rebates and prices change, so we confirm current amounts when we quote.

Book a free Energy Assessment and we will work this out for your home.

Whether it is worth it depends on your evening use, export rates and what you want from backup. It is one of several batteries on the market, and a comparison based on your own usage is the right way to decide.

Prices are indicative, from industry quote data for September 2026. The rebate falls on 1 January 2027.

Book a free Energy Assessment and we will work this out for your home.

After the federal rebate (to 31 December 2026), those become roughly $4,700 to $7,200 for 5kWh, $7,400 to $12,400 for 10kWh, $10,000 to $15,000 for 13.5kWh and $11,200 to $16,200 for 15kWh.

The rebate steps down on 1 January 2027, so the after-rebate price rises even if the battery price stays the same.

Prices are indicative, from industry installer quotes for September 2026. Your quote may differ.

Book a free Energy Assessment and we will work this out for your home.

Add up what you use between sunset and sunrise, using your smart meter data or bill. Compare usable capacity rather than nominal capacity, and check the battery’s power rating (kW) can run the appliances you want at the same time.

Your solar size matters too, because the battery needs enough spare solar to fill it each day.

Book a free Energy Assessment and we will work this out for your home.

Solar power runs your home first. Extra charges the battery, and only once it is full does the rest export to the grid. When solar fades, the battery supplies your home until it empties, then the grid steps in.

The battery connects through a hybrid inverter or a separate battery inverter, and an app shows what is happening.

Solar panels shut down in a blackout for network safety unless the system is designed for backup. Whether your lights stay on, and for how long, depends on the battery, inverter, backup wiring and which circuits are connected.

Tell us which appliances matter most, such as the fridge, medical equipment or a bore pump, and we will explain what is realistic.

Book a free Energy Assessment and we will work this out for your home.

A smart meter measures what you import from and export to the grid. Your electricity bill shows what you bought, less any export credit.

A panel contains dozens of cells made of silicon. Each cell has two layers that create an electric field. When particles of light (photons) hit the cell, they free electrons, and the field pushes them in one direction. Metal contacts collect the flow as direct current (DC) electricity.

Cells are wired together in a panel, and panels are wired together in an array.

A smart meter records the power you import and export. Your retailer sets the feed-in tariff for exports. Because export rates are low, using more solar yourself usually saves more than exporting it.

It also monitors the system and shuts down automatically if the grid goes down, for network safety. String inverters serve the whole array, microinverters sit on each panel and hybrid inverters can also manage a battery.

Inverters are typically warranted for 10 years and last 12 to 15 years.

When a home or business installs a solar power system, the reduction in greenhouse gas emissions is calculated using a formula established by the scheme regulator. Australia is divided into four solar zones, with every postcode assigned to a zone according to the average amount of solar energy it receives. Zone 1 includes the sunniest regions of Australia. Zone 4 includes areas that receive the least solar radiation.

To help reduce the upfront cost of installation, Nexa Solar offers customers a point-of-sale discount when they choose to assign their STCs to the company.

The calculation multiplies your system size in kW by your zone rating and by the deeming period (5 years in 2026, 4 years in 2027), then rounds down to a whole certificate. The zone rating is set by your postcode.

The Clean Energy Regulator publishes the postcode zone ratings and a small generation unit STC calculator. We also work it out for you when we quote.

Book a free Energy Assessment and we will work this out for your home.

Batteries between 5kWh and 100kWh are eligible, with STCs counted on the first 50kWh of usable capacity. Solar water heaters up to 700 litres and heat pump water heaters up to 425 litres are eligible, with each model’s certificate count listed on the Clean Energy Regulator’s register.

Figures checked in November 2026 against the Clean Energy Regulator and industry price data. Rebates and prices change, so we confirm current amounts when we quote.

Solar hot water (also called solar thermal) is separate from solar PV panels. Flat plate collectors are the lower-cost option, while evacuated tube collectors cost more and perform better in cooler climates.

Heat pump systems work differently: they use electricity to move heat from the air into the water, and solar PV panels can help run them.

STCs reduce the price. One 2026 industry example was about 14 certificates (roughly $530) for a 302L solar system in Zone 3, and heat pump systems earn roughly 10 to 17 certificates ($400 to $680 at about $40 each).

Price depends on the system type and tank size, from about 160L to 400L.

Prices are indicative, from industry data as at October 2026. Your quote may differ.

Solar water heaters up to 700 litres and heat pump water heaters up to 425 litres can create STCs. The count depends on the model and your postcode, and it falls each year until the scheme ends in 2030.

We could not confirm a current Queensland state hot water rebate. Check with the Queensland Government or your installer.

Other states: the federal STC discount applies in all of them. New South Wales has offered a Hot Water Upgrade Incentive, reported at up to $640 to replace electric hot water with a heat pump and up to $330 to replace gas, but we could not confirm it is currently open. We could not confirm a state hot water rebate in Western Australia or Tasmania.

Figures checked in November 2026 against the Clean Energy Regulator and industry price data. Rebates and prices change, so we confirm current amounts when we quote.

Solar water heaters up to 700 litres and heat pump water heaters up to 425 litres can create STCs. The count depends on the model and your postcode, and it falls each year until the scheme ends in 2030.

NSW has offered a Hot Water Upgrade Incentive, reported at up to $640 to replace electric hot water with a heat pump and up to $330 to replace gas, with a minimum 5-year warranty and an accredited installer. We could not confirm it is currently open, so check with your installer or the NSW Government.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Solar water heaters up to 700 litres and heat pump water heaters up to 425 litres can create STCs. The count depends on the model and your postcode, and it falls each year until the scheme ends in 2030.

We could not confirm a current Western Australian state hot water rebate. Check with the WA Government or your installer.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Solar water heaters up to 700 litres and heat pump water heaters up to 425 litres can create STCs. The count depends on the model and your postcode, and it falls each year until the scheme ends in 2030.

We could not confirm a current Tasmanian state hot water rebate. Check with the Tasmanian Government or your installer.

State scheme details checked in November 2026 against state government and industry sources. Schemes and amounts change, so we confirm current details when we quote.

Compare solar hot water, a heat pump and an electric system powered by your own solar panels. The upfront price, the STC discount, your hot water use and your electricity or gas prices decide which suits you.

Yes. A solar power system typically includes four different types of warranties, each covering a specific component of the installation. The panel performance warranty guarantees that the panels will continue to produce electricity at an expected level over time, while the product warranty covers manufacturing defects. The inverter warranty covers defects in materials and workmanship under normal operating conditions. The mounting system is covered against manufacturing defects, with additional after-sales support provided for the specified period. The workmanship warranty covers the quality of the installation work carried out by Nexa Solar, ensuring the system has been installed to industry standards.

In the unlikely event that you need to make a warranty claim, simply contact Nexa Solar. Our team will assist you with the entire process, including warranty lodgements, product replacements, and any required repairs.

Many inverter faults can be resolved quickly by performing a simple system reboot. Before restarting your system, follow the shutdown procedure. You can also find these instructions on the front of most inverters. The main switch and AC isolator are typically located in your electrical switchboard and/or next to the inverter. The PV array DC isolator(s) are located beside or underneath the inverter, and some systems may have more than one, so ensure they are all switched off.

To restart the system, follow the shutdown steps in reverse order, then allow a few minutes for the inverter to complete its startup sequence and reconnect to the system. If the issue continues after restarting the inverter, please contact Nexa Solar for further assistance. Our team will be happy to help diagnose the problem and arrange any necessary support.