Balmain: 3.3kW solar + 33kWh battery, 85% self-powered

The brief

This Balmain household had high energy use but, like many inner-west terraces, limited roof space. They wanted to slash their power bills and keep the whole home running during blackouts.

What we installed

We fitted 7 high-efficiency Jinko Tiger Neo panels to make the most of the available roof, paired with a large 33.28 kWh GoodWe battery and a 10kW hybrid inverter configured for full-house backup. The big battery means almost all the solar generated is stored and used on-site rather than exported cheaply.

The result

• Annual bill: $1,932 → $188 — a 90% reduction
• Annual savings: ≈ $1,744 per year
• Self-consumption: 36% → 85% with the battery
• Grid independence: 87% less grid power imported
• Payback: ≈ 9 years

Figures are from this project's design proposal; actual results vary by household usage and tariff.