Real Install Case Studies
On this page we publish Australian solar + battery installs including photos, system size, bill comparison, and a transparent ROI model.
Latest case studies
Case Study #1 (Worked Example): 10kW Solar + 40kWh Battery (QLD)
Note: This is a modelled worked example based on the numbers provided by the client. We can convert it into a full “real install” case study by adding install photos, redacted bills, and monitoring screenshots.
One-screen summary
- Client: Susie T. (New Farm, QLD)
- Annual usage (pre-install): 15,000 kWh/year
- Annual electricity cost (pre-install): $4,000/year
- System: 10kW solar + 40kWh battery
- Rebates/incentives: $16,000 battery rebates + $3,000 solar rebates
- Out-of-pocket cost (after rebates): $20,000
- Result: electricity costs reduced to approximately $0/year (reported)
- Simple payback: ~5 years ($20,000 / $4,000)
Before vs after (plain English)
Before installing the system, the household used about 15,000 kWh/year and spent roughly $4,000/year on electricity (about 26.7c/kWh on average).
After installing 10kW solar paired with a 40kWh battery, the household reports the system has effectively wiped their electricity cost across the year (net $0). Exact outcomes depend on tariff structure, fixed supply charges, and seasonal solar output.
ROI model (assumptions)
- Annual bill avoided: $4,000/year (based on historical bills)
- Net out-of-pocket cost: $20,000 (after incentives)
- Model type: simple payback (does not include time value of money)
- Important: retailer fixed charges may still apply depending on plan; “$0” is net annual outcome
Author: Jeremy Pearce, Founder of Australian Battery Quotes (ABQ).
Want your install featured?
If you’re happy to share photos and a de-identified bill comparison, we can publish a case study.