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

Do you already have solar?

Your last electricity bill$650

We convert this to daily energy use.

Power used at night / evening55%

A battery shifts daytime solar into the expensive evening peak.

Size of your existing solar6.6 kW

Spare daytime generation is what charges the battery.

What matters to you?

Blackout backupKeep essentials running

EV chargingNow or soon

Recommended battery

13.5kWh usable

Sized for your evening use, with backup headroom.

Annual saving

estimate / yr

Payback

years

CO₂ cut

tonnes / yr

Indicative installed price$0

Federal battery rebate$0

NSW battery incentive (PDRS)$0

Your price after rebates$0

Rebates 37%You pay 63%

Evening / overnight use covered0%

Energy shifted off the grid0 kWh/yr

Spare daytime solar available to charge it0 kWh/yr

Matching batteries 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.