Green Home Loans in South Australia (SA) - Discounted Rates for Sustainable Homes
Compare green home loan rates available in South Australia. Stack green rate discounts of 0.20-0.50% with the SA Home Battery Scheme and federal STCs - maximise your savings in Australia's renewables leader.
Rates updated 5 September 2026
Estimated monthly savings $0
Estimated annual savings $0
Based on a typical 6.13% p.a. vs the lowest green rate of 5.74% p.a. over 30 years. Actual savings depend on your loan and home's eligibility.
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Where SA green home loan rates sit today
Held at 4.35% - 11 Aug 2026
5.77% comparison rate
On a 0.40% green discount
On Adelaide’s ~$750K median home, RBA rate cuts plus a 0.40% green discount produce illustrative annual savings of around $2,400. Stack with the SA Home Battery Scheme (up to $4,000) for the best green-finance package in the country. Actual savings depend on your loan size, rate and lender assessment.
Green Home Loans in South Australia at a Glance
SA green at a glance · 2026
0.40%
Avg green discount
Range 0.20-0.50%
~$2,400
Adelaide annual savings
At 0.40% on median loan
8+
Green lenders
All available in SA
70%+
SA renewables
NEM leader on renewable share
SA programs
SA Home Battery Scheme: subsidies up to $4,000 for battery installations. Federal STCs ($2,500-$3,500) for solar and the federal battery rebate stack on top.
Key SA features
SA leads the National Electricity Market with 70%+ renewable energy share and the highest rooftop solar penetration per capita in the world - making solar-plus-battery investments particularly compelling against high retail electricity prices.
Sources: Consumer Data Right (CDR), CEFC, SA Department for Energy and Mining, Clean Energy Regulator. Data as of 20 May 2026.
Best Green Home Loan Rates in Adelaide & South Australia
As of September 2026, the lowest green home loan rate available to South Australian borrowers starts from 5.74% p.a. - a discount of up to 0.40% off standard variable rates. All 8 green loan products are available nationally, giving SA borrowers the full range of options.
| Lender | Product | Green Rate | Standard Rate | Discount | Comparison Rate | Eligibility | Features | Compare |
|---|---|---|---|---|---|---|---|---|
| Westpac | Sustainable Upgrades Investment Loan | 4.49% | 4.89% | −0.40% | 4.49% | 7+ stars | ||
| Westpac | Sustainable Upgrades Home Loan | 4.49% | 4.89% | −0.40% | 4.49% | 7+ stars | ||
| Unloan verified May 22 | Green Discount | 5.74% | 5.99% | −0.25% | 5.77% | 7+ stars | Redraw, Auto-discount | |
| CommBank verified May 22 | Green Home Loan | 5.79% | 6.19% | −0.40% | 5.82% | 7+ stars | Offset, Redraw | |
| Athena verified May 22 | Green Rate | 5.84% | 6.04% | −0.20% | 5.86% | 7+ stars | Redraw, No fees | |
| Bank Australia | Clean Energy Home Loan | 5.88% | 6.28% | −0.40% | 6.21% | 7+ stars | Digital banking, Offset, Redraw | |
| Bendigo Bank verified May 22 | Green Home Loan | 5.94% | 6.24% | −0.30% | 5.97% | 7+ stars | Offset, Branch | |
| Bank Australia | Offset Home Loan | 5.95% | 6.35% | −0.40% | 6.14% | 7+ stars | Digital banking, Offset, Redraw | |
| Bank Australia | Clean Energy Investment Loan | 6.04% | 6.44% | −0.40% | 6.34% | 7+ stars | Digital banking, Offset, Redraw | |
| NAB verified May 22 | Green Home Loan | 6.04% | 6.24% | −0.20% | 6.16% | 7+ stars | Offset, Branch | |
| Bank Australia | Basic Home Loan | 6.13% | 6.53% | −0.40% | 6.13% | 7+ stars | Digital banking, Redraw | |
| Great Southern Bank | Basic Variable OO P&I | 8.00% | 8.40% | −0.40% | 6.10% | 7+ stars | Redraw, Digital banking | |
| Great Southern Bank | Offset Variable OO P&I | 8.20% | 8.60% | −0.40% | 6.30% | 7+ stars | Redraw, Offset, Digital banking | |
| Great Southern Bank | Basic Variable Investment P&I | 8.43% | 8.83% | −0.40% | 6.30% | 7+ stars | Redraw, Digital banking | |
| Great Southern Bank | Offset Variable Investment P&I | 8.63% | 9.03% | −0.40% | 6.51% | 7+ stars | Redraw, Offset, Digital banking |
Sustainable Upgrades Investment Loan
4.89%
−0.40%
4.49%
Sustainable Upgrades Home Loan
4.89%
−0.40%
4.49%
Green Discount
5.99%
−0.25%
5.77%
Green Home Loan
6.19%
−0.40%
5.82%
Green Rate
6.04%
−0.20%
5.86%
Rates based on $600,000 owner-occupier P&I loan, 80% LVR. NatHERS 7+ star eligibility. Rates are indicative and subject to change. "Lowest" = the lowest rate on our live CDR feed at the time of viewing, across the lenders we display, excluding products with restricted eligibility (e.g. defence service). "Curated" = a rate we maintain manually from the lender's published pricing (used where the lender does not publish it via CDR) and verify against the lender's website. Rates update daily and not all lenders are included, so other products may be lower. Source: Consumer Data Right (CDR), lender websites, CEFC. Last updated: 5 September 2026. Warning: This comparison rate is true only for the examples given and may not include all fees and charges. Different terms, fees or other loan amounts might result in a different comparison rate.
Green savings example: On a $600,000 SA loan over 30 years, a 0.40% green discount - saving roughly $150/month, or around $54,000 over the life of the loan, on top of bill savings from running an efficient home.
Save up to $3,832/year with a green home loan
Compare your current rate against the lowest green home loan rate on our live Consumer Data Right feed - 5.74% p.a. for eligible energy-efficient homes.
- Discounted rates for energy-efficient homes
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*Illustrative only. Based on a $650,000 loan over 30 years switching from 6.50% to 5.74%. Green home loans require lender-specific eligibility (e.g. NatHERS rating, energy efficiency benchmarks, or qualifying upgrades). Actual savings depend on your loan details and lender assessment.
Indicative Savings with a Green Home Loan in South Australia
Calculate your savings from a green loan rate discount plus estimated energy bill reductions.
Green Loan Rate Savings
Total Cost Comparison
We compare Australia's green home loan lenders
(every green loan product, one place)
+ many more Reward your SA efficient home with a better rate.
Green home loans reward energy-efficient SA builds and renovations with rate discounts of up to 1% p.a. Compare green home-loan products from leading Australian lenders.
Eligible Green Upgrades in South Australia
Energy upgrades that qualify for green loan eligibility and SA incentives.
Solar PV Panels
Adelaide receives excellent solar irradiance with 4.7 peak sun hours per day. A 6.6kW system costs $4,500-$7,000 after STCs and generates 26-31kWh/day. SA has the highest rooftop solar per capita globally. Payback period: 3-4.5 years.
- 6.6kW system (SA)
- $4,500-$7,000
- Annual savings
- $1,400-$2,200
- Payback
- 3-4.5 years
Battery Storage
South Australia leads the nation in home battery adoption. The SA Home Battery Scheme provides up to $4,000 subsidy, stackable with the federal battery rebate. VPP participation through SA Power Networks or retailers can generate $300-$1,000/year. Qualifies for green loan eligibility.
- 10kWh battery (SA)
- $8,000-$12,000
- SA Battery Scheme
- Up to $4,000
- Payback (with subsidies)
- 5-8 years
EV Chargers
Level 2 home EV charger installation in South Australia costs $1,500-$5,000. Smart chargers paired with solar panels enable free daytime charging. SA's high solar penetration makes solar-powered EV charging particularly cost-effective. Accepted by select lenders for green eligibility.
- Level 2 charger (SA)
- $1,500-$5,000
- Annual fuel savings
- $1,000-$2,000
- Solar-charged savings
- Up to $2,500/yr
Insulation & Glazing
Adelaide's Mediterranean climate has hot dry summers and cool winters, making insulation valuable year-round. Ceiling insulation and double glazing reduce both heating and cooling costs. Particularly impactful for older SA homes which often lack adequate insulation.
- Ceiling insulation
- $1,500-$3,500
- Double glazing
- $8,000-$20,000
- Payback (insulation)
- 2-4 years
Heat Pump Hot Water
Heat pump hot water systems use 65% less energy than electric storage. Adelaide's warm climate makes heat pumps highly efficient. Federal STCs provide an upfront discount. SA's high electricity prices mean heat pumps deliver strong savings compared to electric or gas systems.
- Heat pump (installed)
- $3,000-$5,000
- Annual savings
- $400-$700
- Federal STCs
- Available
Water Efficiency
South Australia is one of the driest states in Australia. Rainwater tanks are mandatory for new builds in many SA council areas. Water-efficient fixtures and greywater systems are particularly valuable given SA's limited rainfall and water restrictions history.
- Rainwater tank (5,000L)
- $2,000-$4,000
- Water bill savings
- $200-$500/yr
South Australia Green Incentive Stacking
Combine green loan discounts with SA and federal incentives for maximum savings.
SA Home Battery Scheme
The South Australian Home Battery Scheme provides subsidies of up to $4,000 toward the purchase and installation of a home battery system. SA pioneered home battery adoption in Australia and this scheme remains one of the most generous state battery incentives. The subsidy is applied at the point of sale by approved retailers.
| Type | State government subsidy |
| Battery subsidy | Up to $4,000 |
| Eligibility | SA homeowners with solar |
| Applied | At point of sale |
Federal Battery Rebate
The federal battery rebate can be stacked with the SA Home Battery Scheme, significantly reducing the total cost of a home battery system. SA households can access both state and federal battery incentives simultaneously, plus potential VPP income from battery participation.
| Type | Federal government rebate |
| Stacks with SA scheme | Yes |
| VPP income potential | $300-$1,000/year |
| Programs | Tesla, AGL, Origin, SA Power |
Federal STCs (Solar Rebate)
Small-scale Technology Certificates provide an upfront discount on solar panel installations across Australia, including South Australia. The rebate reduces the cost of a 6.6kW system by $2,500-$3,500. Adelaide's high solar irradiance means strong STC generation. STCs are available until 2030 but decrease each year.
| Type | Federal government rebate |
| Value (6.6kW) | $2,500-$3,500 |
| Available until | 2030 (reducing) |
| Applied | Upfront at purchase |
Incentive Stacking Strategy for South Australia
Adelaide example: $750K home with a green home loan at 0.40% discount, 6.6kW solar with STCs, battery with SA Home Battery Scheme + federal rebate, and VPP income. SA offers the strongest battery incentive stacking of any Australian state.
| Green rate saving (annual) | ~$2,400 |
| Solar bill savings (annual) | $1,400-$2,200 |
| VPP income (annual) | $300-$1,000 |
| Upfront STCs + SA battery | $6,500-$7,500 |
SA stacking strategy: Combine the green loan discount with the Home Battery Scheme (where available), federal STCs ($2,500-$3,500 off a 6.6kW system), and lower energy bills - SA's high retail electricity prices mean bigger savings, often $8,000+ upfront and $3,500-$5,500 annually.
NatHERS Requirements for Green Loans in South Australia
All major green loan lenders require a minimum NatHERS rating of 7 stars. South Australia adopted the NCC 2022 energy provisions in October 2023, meaning new homes built since then should meet this standard automatically. For older homes, the solar panel pathway is particularly accessible - SA has the highest rooftop solar penetration per capita in the world.
| Lender | Minimum NatHERS Rating | Alternative Eligibility | Verification Method |
|---|---|---|---|
| CBA | 7 stars | Solar panels (min 3kW) | NatHERS certificate or solar proof |
| Bank Australia | 7 stars | Solar + battery, EPC rating | NatHERS certificate or assessor report |
| Bendigo Bank | 7 stars | Solar panels installed | NatHERS certificate |
| Westpac | 7 stars | Solar, battery, EV charger | NatHERS certificate or installer receipt |
| Unloan | 7 stars | Solar, energy upgrades | Self-declared + evidence |
| NAB | 7 stars | Solar panels, battery | NatHERS certificate or evidence |
| Athena | 7 stars | Solar panels installed | NatHERS certificate or proof |
Solar panels (min 3kW)
NatHERS certificate or solar proof
Solar + battery, EPC rating
NatHERS certificate or assessor report
Solar panels installed
NatHERS certificate
Solar, battery, EV charger
NatHERS certificate or installer receipt
Solar, energy upgrades
Self-declared + evidence
Solar panels, battery
NatHERS certificate or evidence
Solar panels installed
NatHERS certificate or proof
NatHERS requirements as published by each lender. Alternative eligibility pathways may change. Source: Consumer Data Right (CDR), lender websites, NatHERS Administrator. Last updated: 5 September 2026.
Building Green in South Australia
South Australia adopted the NCC 2022 energy efficiency provisions in October 2023, requiring all new residential builds to achieve a minimum 7-star NatHERS rating. New homes built in SA since late 2023 automatically qualify for green home loan discounts. SA's Mediterranean climate requires passive design that addresses both summer heat and winter cold, with particular emphasis on thermal mass, shading, and natural ventilation.
NCC 2022 in South Australia
- 7-star minimum for new builds
- Whole-of-home energy budget
- Adopted October 2023
- Rainwater tanks mandatory (many areas)
SA NatHERS climate zones
- Adelaide metro - warm temperate (zone 16)
- Adelaide Hills - cool temperate
- Murray Mallee - hot dry/cold winters
- South-east SA - Mediterranean climate
Passive design for South Australia
- Thermal mass for temperature regulation
- North-facing living areas for winter solar gain
- Deep eaves and external shading for summer
- Cross-ventilation for sea breeze cooling
$72K+
Potential savings over 30 years (Adelaide median)
Based on 0.40% discount on $750K
70%+
SA renewable energy share in NEM
Highest in Australia's electricity market
$4,000
SA Home Battery Scheme subsidy
One of Australia's most generous
Frequently Asked Questions
Everything you need to know about green home loans in South Australia.
Green Home Loans in South Australia
South Australia Green Energy & Eligibility
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