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 business

Type of site

Daytime operations capture the most solar directly, so they pay back fastest.

Average monthly electricity bill$4,000

Include energy, demand and supply charges — the whole bill.

Peak demand charge share of the bill25%

On many commercial tariffs this is the single largest line. Check your bill.

Usable roof area600 m²

Clear area only — excluding plant, skylights and walkways.

Your energy rate (c/kWh)28c

Options

Add storageShaves peak demand

Show finance viewRepayment vs saving

Recommended system

0kW

Sized to your daytime load and the roof area available.

Annual saving

energy + demand

Payback

years

10-year return

on net cost

Indicative installed price$0

STC discount at point of sale$0

Net capital cost$0

Annual generation0 kWh

Used on site during trading hours0 kWh

Energy charge saved$0

Demand charge saved$0

CO₂ avoided0 t/yr

Roof area used0 m²

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Matching equipment from our confirmed range

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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.