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Indicative payback periods & IRR for SunGrow PowCube as part of a new system or as retrofit
(Results for Sydney as of Jan 2018. All results indicative only; actual results will depend on your individual circumstances. You can explore outcomes yourself with Solar Choice’s Solar & Battery Sizing & Payback Estimator.)Approx costsTariff typePayback period (years)IRRSavings year 1 (battery only)Savings year 1 (solar only)Brand new ‘whole’ solar + battery system5kW solar system for $6,200 (incl $1,000 premium for hybrid inverter) plus $3,500 for battery.Total: From $11,200Flat rate – 25c/kWh7.514%$330$1,200TOU7.116%$400$1,200Full retrofit to existing 5kW solar system(inverter + battery)From $8,000(includes emergency backup)Flat rate – 25c/kWh20″}”>20-2.6%$330$1,200TOU>20-5.5%$430$1,200Battery only
(as part of simple retrofit or ‘whole’ system)From $5,000Flat rate – 25c/kWh>20 years (full system)
/ 11 years (retrofit)
15% / -2.6%$330$1,200TOU7.1 (full system)
/ 11.9 (retrofit)16% / 1.4%$430$1,200
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