Solar vs Grid Electricity Cost — 2026 Australia Comparison
Side-by-side cost comparison of rooftop solar against Australian grid electricity in 2026. Levelised cost per kWh, payback period, AER DMO benchmarks, and state feed-in tariffs.
Australia has the world’s cheapest installed solar — and some of the world’s most expensive grid electricity per kWh. That combination produces the most lopsided solar-vs-grid comparison of any major market. The AER’s 2025–26 Default Market Offer (DMO 7) puts the residential single-rate reference price at A$0.34–A$0.42 per kWh depending on distribution zone (Ausgrid, Endeavour, Essential, SAPN, Energex, Ergon, JEN, CitiPower, Powercor, AusNet, TasNetworks). A standard 6.6 kW residential system installed under the Clean Energy Council Approved Retailer scheme produces electricity at a 25-year LCOE of roughly A$0.05–A$0.08 per kWh post-STC discount. The grid is 5–8× more expensive on a levelised basis.
Levelised cost: solar versus grid
Solar LCOE = (net system cost + 25-year O&M + inverter replacement) / lifetime kWh produced. For a 6.6 kW system in Brisbane (STC zone 3):
- Gross cost: A$5,400 (SunWiz Q1 2026 indicative for 6.6 kW)
- Less ~70 STC discount @ A$36/STC (after market clearing): −A$2,520
- Net cost: A$2,880
- 25-year production: ~150,000 kWh (PVGIS Brisbane, 0.5%/yr degradation)
- O&M + inverter replacement (year 12): A$2,000
- LCOE: A$0.032/kWh
The DMO retail rate in the same Energex zone (single-rate residential) sits at A$0.337/kWh. Even with no behavioural change and no battery, the cash payback period is 3–4 years on a 6.6 kW system in Queensland, NSW or South Australia.
State-by-state comparison (Q1 2026)
| State / Distributor | DMO 7 single-rate (c/kWh) | Avg yield (kWh/kW) | Payback (no battery) |
|---|---|---|---|
| Brisbane (Energex) | 33.7 | 1,500 | 3–4 yrs |
| Sydney (Ausgrid) | 38.6 | 1,400 | 4–5 yrs |
| Sydney (Endeavour) | 36.1 | 1,400 | 4–5 yrs |
| Sydney (Essential rural) | 41.6 | 1,450 | 3–5 yrs |
| Adelaide (SAPN) | 41.0 | 1,500 | 3–5 yrs |
| Melbourne (CitiPower) | 28.9 | 1,250 | 5–7 yrs |
| Melbourne (AusNet rural) | 35.2 | 1,300 | 4–6 yrs |
| Hobart (TasNetworks) | 30.5 | 1,150 | 6–8 yrs |
| Perth (Synergy) | 29.0 | 1,650 | 4–5 yrs |
| Darwin (PWC) | 27.2 | 1,800 | 4–5 yrs |
| Canberra (Evoenergy) | 28.1 | 1,400 | 5–7 yrs |
Source: Australian Energy Regulator Default Market Offer 2025–26, Clean Energy Regulator STC zone register, SunWiz Australian Solar Industry Insights Q1 2026, Bureau of Meteorology solar exposure data.
Feed-in tariffs are now a small part of the equation
Australian retailers paid 6–8 c/kWh as a single FiT rate in 2024–25 — the structural decline reflects daytime grid oversupply during high-solar hours. 2026 fixed FiT band:
| Retailer | Fixed FiT (c/kWh) | Time-of-export FiT |
|---|---|---|
| Powershop SunBoost (VIC) | 12.0 (5 kWh cap) | n/a |
| Origin Solar Boost (NSW) | 10.0 | n/a |
| Energy Locals | 8.0 | TOU available |
| AGL Solar Savers | 5.0 | 11.0 (4–9 pm) |
| Red Energy Solar Bonus | 6.0 | n/a |
| Synergy DEBS (WA) | 2.5 (off-peak) | 10.0 (3–9 pm) |
| ActewAGL ACT FiT | 6.5 | n/a |
Source: state retailer FiT databases (April 2026). The headline takeaway: self-consumption is now worth ~30 c/kWh, exports earn ~5–10 c/kWh, so any battery storage that shifts kWh from export to self-consumption is worth roughly 20 c/kWh of arbitrage.
Cheaper Home Batteries Program — the 2026 game-changer
The Federal Cheaper Home Batteries Program (legislated December 2024, started July 2025) reduces the upfront cost of certified residential battery storage by ~30% (~A$370/kWh discount, declining 2026–2030). For a 13 kWh battery the upfront cost drops from ~A$11,000 to ~A$6,200, which collapses battery payback from 14 years to 7–8 years in most states. State stacks: VIC Solar Homes Battery Loan, ACT Sustainable Household Scheme, NSW PDRS, SA Home Battery Scheme legacy customers, NT Home Battery Scheme.
Where the grid still competes
- Apartment dwellers without roof access — strata schemes are improving with the AEMC’s Updating the regulatory frameworks for embedded networks but still complex.
- Renters — solar capex sits with the landlord; bill savings sit with the tenant. Models like Smart Energy’s Solar for Renters are emerging but still niche.
- Heavily shaded inner-city blocks (e.g. Sydney terraces with neighbour overshadowing) where annual yield drops below 1,000 kWh/kW.
- High-volume off-peak users on controlled-load tariffs at A$0.18–A$0.22/kWh — the LCOE delta is real but the payback stretches past 7 years.
Escalation: how DMO has actually moved
The AER’s DMO has compounded at roughly 4.0%/yr from DMO 1 (2019) to DMO 7 (2025–26), with significant volatility tied to wholesale spot. Comparison over 25 years:
| Annual escalation | 25-year average DMO rate | 25-year solar LCOE |
|---|---|---|
| 2% | 43 c | 5 c |
| 3% | 49 c | 5 c |
| 4% (2019–26 actual) | 56 c | 5 c |
| 5% | 64 c | 5 c |
What the calculators tell you
Run the Cost of Solar Panels Calculator with your postcode for an STC-adjusted system cost. The Solar Panel Payback Calculator takes your year-1 retail rate, FiT, self-consumption ratio and DMO escalation. The Solar Panel ROI Calculator layers in 25-year IRR, inverter replacement and Cheaper Home Batteries Program rebate. The Solar Panel Savings Calculator outputs annual A$ saved net of supply charge.
The 30-second answer
For any Australian owner-occupier with a north, east or west-facing roof, an annual consumption above 4,000 kWh, and a 6.6 kW or larger system, solar in 2026 beats the grid by a 5–8× LCOE margin (4–8 c versus 28–42 c retail). Battery attachment is now economic in every mainland state once the Cheaper Home Batteries Program rebate is applied. Payback periods are amongst the shortest in the world (3–5 years in QLD, NSW, SA; 5–7 years in VIC, TAS, ACT) and regulatory risk is minimal — STCs are locked through 2030, the Cheaper Home Batteries Program is locked through 2030, and the AER DMO continues to compound at 3–5%/yr.
Reference: AER Default Market Offer 2025–26 final determination, Clean Energy Regulator STC zone map and clearing-house price register, Clean Energy Council Approved Retailer Code of Conduct, SunWiz Australian Solar Industry Insights Q1 2026, Bureau of Meteorology solar exposure dataset, AS/NZS 3000:2018 + AS/NZS 5033:2021, Australian Government Cheaper Home Batteries Program implementation guidelines (DCCEEW, July 2025).