Solar & Battery Savings Calculator

Location

State ? Your state affects electricity rates, peak sun hours, and government rebates. VIC residents may qualify for the Solar Homes Program.

Postcode (required)

Please enter a valid 4-digit postcode.

Electricity Details

Cost per kWh (inc GST, in dollars) ? The "usage rate" on your electricity bill. Not to be confused with the daily supply charge. Your bill or retailer website will have this figure.

$0.30

20c60c

Annual electricity spend ? Your total annual electricity cost including GST and supply charges. Multiply your average quarterly bill by 4, or monthly by 12.

per year

$200$15,000

Supply charge ? The fixed daily fee charged regardless of how much power you use. Solar panels do not reduce this charge, but it is useful for calculating your true electricity cost.

$/day

Feed-in tariff ? What your retailer pays you for each kWh of solar you export to the grid. VIC has a minimum FiT set by the Essential Services Commission each year.

$0.06

0c20c

Assume feed-in tariff drops over time ? Feed-in tariffs have been falling across Australia. Turn this on to model a 1c/year reduction (floor of 3c) in the 10-year savings projection.

System Details

I already have solar panels installed ? Tick this if solar is already installed and you want to add a battery only. We'll calculate the extra savings a battery adds to your existing system.

Property type

System size ? "Recommend for me" picks the best system size based on your electricity spend. You can also choose a specific size if you already have one in mind.

Battery storage ? A battery stores surplus solar for use at night, lifting your self-consumption and savings. Federal rebates under the Cheaper Home Batteries Program apply in all states, and step down again on 1 January 2027.

Do you plan to add an EV charger? ? Each electric vehicle adds approximately 2,500 kWh/year of electricity. Charging during the day significantly increases the solar you consume yourself, boosting your savings.

Estimated annual savings

in your first year

10yr

10-year savings

⏱

Payback period

⚡

Recommended size

🌿

CO2 offset/yr

System cost breakdown

Estimated system cost (before rebates) --

Federal STC discount --

Your out-of-pocket cost --

Annual electricity cost comparison

What you pay now versus after going solar.

Before solar

$2,000

After solar

$1,200

10-year cumulative savings

Includes 0.5%/yr system degradation.

How much could you save withsolar and batteries?

Location

Electricity Details

System Details

How much could you save with
solar and batteries?