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This information is general in nature and does not constitute financial, tax, or legal advice. Rebate amounts, eligibility, and tariff rates change frequently and may not be current.
Consult a licensed financial advisor, tax professional, and electricity retailer to understand your specific situation. We are not responsible for financial decisions made based on this information.
Quick answer
This dashboard turns a battery quote into a payback year and a 10 or 20 year net return. Savings are modelled at Synergy's A1 rate of 33.26c/kWh for every stored kilowatt-hour you avoid importing, plus DEBS export credits of 10c/kWh at peak and optional Battery Rewards credits of 70c/kWh discharged during VPP events. Adjust battery size, price and daily usage to match your quote and see when it pays itself off.
Sources: Synergy A1 tariff · Synergy DEBS schedule · Synergy Battery Rewards
Notes:
ROI uses Synergy A1 + DEBS rates, assumes a 92% round-trip efficiency and 95% depth-of-discharge, includes federal STC + WA Battery Rebate eligibility, and projects over a 10-year horizon. Adjust inputs above to model different system configurations.
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Payback Period: How long before your cumulative savings equal your initial investment. Most Perth batteries achieve payback in 7-12 years depending on usage patterns and electricity prices.
Net Return: Total savings minus your initial investment. Green bars indicate years where you're in profit. The visualization accounts for 2% annual battery degradation.
Scenarios: Compare VPP participation vs non-VPP, and see how optimising export timing during DEBS peak hours (3-9pm) can improve returns by hundreds of dollars annually.
Important: These projections assume current electricity prices remain constant. Historical trends show WA electricity prices increasing 3-5% annually, which would improve actual returns.