Calculate monthly repayments for Powerwall, Alpha ESS, Sungrow and other battery systems. Includes state government rebates, payback period analysis, and business instant asset write-off eligibility.
Based on your electricity rate and daily battery usage. Assumes 90% usable capacity, 2 cycles/day average.
⚠️ Payback calculations are indicative. Actual savings depend on your usage patterns, export tariff, battery degradation, and VPP participation terms.
If the battery is installed at your business premises, significant tax advantages apply.
Tax saving is an estimate based on 25% company tax rate. Consult your accountant for exact figures. Systems > $20,000 use the Small Business Depreciation Pool (SBP) at 15% in year 1, then 30% diminishing value.
Battery storage system installations in Australia grew by 47% in 2025, driven by rising electricity prices, improved battery technology, and generous state government rebate programs. In 2026, the average installed cost for a quality 10–14 kWh home battery system sits between $10,000 and $16,000 — well within the reach of finance.
With green energy loans available from 5.9% p.a. and repayments as low as $180–$250 per month for a typical system, financing makes the upfront cost manageable while you start saving on electricity from day one. In many scenarios, the monthly electricity saving partially or fully offsets the finance repayment — making the net out-of-pocket cost surprisingly small.
Most major battery brands (Tesla, Alpha ESS, Sungrow) can be enrolled in a Virtual Power Plant program, where your battery discharges to the grid during peak demand events. Typical VPP payments range from $200 to $500 per year, reducing your effective payback period by 1–3 years. AGL, Origin, Tesla Energy Plan, and Amber Electric all offer VPP programs in 2026.
If your battery is installed at business premises (retail, warehouse, farm, office), it qualifies as a depreciable business asset. Businesses with turnover under $10M can claim a full instant asset write-off in the year of purchase for systems costing $20,000 or less — effectively cutting the after-tax cost by 25–30%. Larger systems use the Small Business Depreciation Pool.
Our team works with lenders who specialise in solar and battery finance. We'll compare green loans, business equipment finance, and personal loan options to find the lowest rate for your system.
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