What’s the Difference Before and After Installing a Battery for a 20kW Solar PV System?
August 6, 2025
Here’s a real-world example that shows the impact clearly:
🔋 Before Installing the Battery
- PV system: 20kW
- Average night-time electricity usage: 12.34 kWh
- Quarterly electricity bill: $234 AUD (to pay)
🔋 After Installing a 10kWh Battery
- Average night-time usage drops to: 4.38 kWh
- Quarterly electricity bill: –$190 AUD (credit)
- Total quarterly savings: $234 + $190 = $424 AUD
This is with just a 10kWh battery. If you install a larger 50kWh battery, your energy independence and savings will multiply, especially for homes with high energy usage or EV charging needs.
Energy storage isn’t just about backup—it’s a smart way to maximize your solar investment and take control of your electricity bill.
Learn how the NSW VPP incentive and Federal Cheaper Home Batteries Program slash solar battery costs in 2025. Save big with rebates up to $16,800.
Sydney’s roofs are turning into mini power stations, solar panels are everywhere. The missing piece? Storing that power so it works for you when the sun goes down.
Wondering if solar batteries are worth it? Discover how rebates, VPPs, and fair pricing make batteries in Sydney & NSW a smart investment in 2025.
