Calculators

Perform the calculation you need

Your location & roof

Where is the property, and which way does the roof face?

State

Region

Postcode optional

Roof orientation0° N

Drag the dial, use the arrow keys, or pick a direction. 0° is north.

Roof angle20°

Most Sydney tiled roofs are 20–25°. Flat and low-pitch roofs are usually tilted on frames.

Power supply

Single phase usually limits the inverter to 5–10kW and exports to 5kW.

Your electricity tariff

Who supplies your power, and on what tariff?

We fill in current 2026–27 NSW rates. Have your bill handy? Tick the box below and enter only the prices printed on it.

State

Customer type

Network on your bill as “Distributor”

Retailer

Tariff type

Enter my own rates from my bill — leave blank anything your bill doesn’t show; we keep using our figures for it.

Usage rate c/kWh

Anytime / general usage

Peak c/kWh

Usually 3pm–9pm

Shoulder c/kWh

Daytime, where your tariff has one

Off-peak c/kWh

Overnight

Controlled load c/kWh

Separate hot-water circuit

Daily supply charge c/day

Also shown as $/day

Solar feed-in c/kWh

What you are paid to export

Demand charge c/kW/day

Business demand tariffs

Website optional — where did you get these rates?

Only used to check and update our tariff records. It is never shown on the website.

Prices you type are saved anonymously — no name, email, address or IP — and help us give better estimates to other NSW households on the same retailer and network.

Your home

Your last electricity bill$650

We convert this to your annual usage in kWh.

Electricity use during the day40% used

Out during the dayMostly export solarHome during the dayUse mostly solar

Power used in the evening / overnight55%

More evening use means a battery earns its keep faster.

Shading across the dayNone

Trees, neighbouring buildings, chimneys, aerials.

Usable roof spaceModerate (~30 panels)

Roughly how many panels fit on the good sections.

System sizeRecommended

Plans for the next 1–3 years

Electric vehicleAdds ~3,500kWh/yr

Pool or ducted A/CAdds ~2,000kWh/yr

Include a batteryFederal battery rebate applies

Blackout backupExtra headroom

Recommended system

8kW solar

13.5kWh battery

Right-sized to cover most of your usage with evening cover.

Average annual saving

estimate / yr

Generation per day

kWh / day average

Payback

years

Greenhouse gas cut

tonnes CO₂ / yr

Across the year

Indicative installed price$0

STC solar discount$0

Federal battery rebate$0

NSW battery incentive (PDRS)$0

Your price after incentives$0

Incentives 30%You pay 70%

Annual generation0 kWh

Used in your home (self-consumption)0 kWh

Exported to the grid0 kWh

Panels needed at 440W0

Yield at your location and roof0 kWh/kW/yr

Matching equipment from our confirmed range

Get an in-home assessment →Call 0421 458 217

Step 2 · Free full quote

Get a proper quote from our team

Send your estimate and a few details — we prepare a real, itemised quote for your property. Free, no obligation.

Estimates only, for planning — your actual result depends on your tariff, roof, usage and the products chosen. Rebate and tariff figures are current as of September 2026: the federal Cheaper Home Batteries Program (tiered per-kWh via STCs) and the STC discount on new solar step down on a set schedule, the NSW PDRS household battery install incentive is suspended, and we confirm the exact value at quote. Verify current values with the Clean Energy Regulator and NSW Government.