Case Study - David C.

David heard about 28Watt through a friend who had just completed a free home assessment and swapped her old gas stove for a new induction cooktop. Intrigued by her glowing feedback and the promise of lower bills, David decided to find out if he could also reduce his own energy costs.
The end result? Spoiler alert - David is projected to save over $55,000 in the next 5 years.
Living in a detached, four-bedroom home in Newcastle, NSW - with electricity and gas expenses climbing, David saw an opportunity to future-proof his property by embracing home electrification. And that’s exactly what he did. Read below to find out how.

The Background & Initial Goals
Property: A brick-built, four-bedroom house with ample roof space.
Annual utility costs: $4,729 for electricity + $1,116 for gas.
Remaining mortgage: $690k at 6.14%.
David wanted a future-proof solution to rising energy costs while securing better mortgage terms. He hoped to refinance with a lower interest rate and invest in sustainable options for a greener, more cost-effective lifestyle.
The 28Watt Process
After filling out the quick online form, David received his free assessment on the spot, showing how 28Watt could help him install solar, a battery, and a heat pump to eliminate gas usage and reduce dependence on the grid.
Installer Selection
28Watt coordinated two site visits from trusted providers. David chose RenewCo for a complete electrification suite featuring:
- REC Solar Panels
- Sigenergy Battery
- Apricus 260L Heat Pump

RenewCo’s team completed the home upgrades in just one day:
- Early Start & On-Time Finish: Panels were mounted in the morning, the battery was set up by midday, and the heat pump replaced the old gas system shortly after.
- Clear Guidance: David received straightforward instructions on system maintenance and usage.
- Friendly, Professional Service: The crew handled every detail, from moving furniture to safety checks.
Securing a 1% reduction in home loan rate
28Watt introduced David to Finn, a specialist in-house broker for green mortgage options. Within weeks, Finn had successfully secured a new mortgage rate of 5.13%, down from 6.14%. This strategic clean energy refinance covered part of the installation cost and immediately began saving David thousands in interest.

The exciting outcome!
- Zero Bills: David’s previous $5,845 yearly energy expenditure dropped to $0.
- Substantial Mortgage Savings: Lowering his rate by over 1% reduced monthly payments and improved cash flow.
- Overall Savings: Projected at $55,248 over the next 5 years, funds David now plans to spend on a long-overdue family vacation and small home renovations.
Start Saving Today!
At 28Watt, we’re here to make home electrification simple, affordable, and effective - so that homeowners like you and David can maximise your savings, without any added stress.
Ready to experience the benefits of home electrification including lower bills, a cheaper home loan, and a more valuable home? Take the first step by completing a Free Home Assessment below. Get a personalised plan, connect with vetted installers, and discover financing solutions that cut bills and secure a greener future.
Join homeowners like David who’ve turned soaring bills into zero-dollar statements - all while enjoying a better mortgage rate and a lower emissions lifestyle!