BETA This design tool is in testing. Figures are estimates and will be confirmed by our team before anything is quoted.

⚡ Sydney Solar Savings

Find out how much you could save with solar.

Get a personalised estimate for your home in a few minutes. Tell us your usage and we'll recommend the right system, or skip ahead and choose exactly what you want. Every calculation here reflects how we actually design systems - the engineering discipline, installation experience and customer outcomes Zero 4 Energy has built since 2019, with a team carrying more than a decade in the industry.

✅

SAA Accredited Design and Installations

📋

Engineered Proposals with full engineering documentation

🎯

Bespoke Solutions built around your home and usage

⚡

A Real Quote in Minutes without waiting for a salesperson to visit or call

📐

Fully Engineered to You sized for your roof, usage and network, not a generic package

🔧

Quality Components Only Tier-1 panels and inverters, 10-year workmanship warranty

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Transparent From the Start every figure itemised and our assumptions on the page

How it works

Tell us about your usage, or choose your own system

We'll suggest the right fit, or you pick exactly what you want

Get your personalised estimate

System size, savings, payback, tailored to your home

Request your engineered quote

Our team designs a bespoke proposal for your property

This tool quotes residential systems. For a business or commercial site, request a call.

No commitment · Free · Takes a few minutes

Let's get started

Tell us about your property

We'll use your address to display your roof and tailor your estimate.

Street address *

Please enter your address

Suburb *

Please enter your suburb

Postcode *

Please enter your postcode

Do you own this property? *

🏠

Yes, I own it

🔑

I rent

📋

Buying soon

Is this for a home or a business?

🏠

Home

🏢

Business

How should we size your system?

Most people let us work from their bill. Either way, you can adjust the result.

Recommended

Size it from my bill

Tell us what you spend and when you use power. We size the system to your home.

I know what I want

Choose the system type and size yourself, then see package pricing.

Do you currently have solar panels?

This helps us understand your starting point.

❌

No solar

☀️

Yes, keep it

🔄

Yes, replace it

What's your electricity bill? *

Enter the amount from a recent bill and select the period.

Which season was this bill from? (optional, sharpens your estimate)

❄️

Winter

☀️

Summer

🍂

Autumn / Spring

How is your home heated? (optional)

🔥

Gas heating

⚡

All electric

💡 Find this on a recent electricity bill under "Amount Due" or "Total Charges".

Speak to our team

Let's talk it through

Tell us how to reach you and one of our engineers will call. There is no cost and no obligation.

Your name *

Please enter your name

Email *

Please enter a valid email address

Phone *

Please enter a contact number

Property address (optional)

Best time to call

📞

Anytime

🌅

Morning

🌇

Afternoon

Anything you would like us to know? (optional)

One of our engineers will be in touch to arrange a time.

Request received

Thanks - . One of our engineers will be in touch to arrange it.

Your reference

Reference -

Reason -

We will call -

Quote this reference if you contact us in the meantime.

We could not work out your estimate

Our system did not respond just now. Your answers are saved, so you can try again without starting over.

🔋

A battery without solar needs a closer look

Charging a battery from the grid alone only stacks up in specific situations, the right tariff, the right usage pattern. Rather than give you a rough number, this one deserves a proper conversation with our engineers. It's free and there's no obligation.

When do you use the most energy?

Drag to your typical peak usage time. This shapes what we recommend.

6:00 PM

Evening peak, battery will help most

12am6am12pm6pm11pm

Also tick any other peak times:

☀️ Morning (6-10am)

🌤 Midday (10am-2pm)

🌇 Afternoon (2-6pm)

🌆 Evening (6-10pm)

🌙 Night (10pm+)

What electricity tariff are you on?

📊

Flat rate

Same rate all day

⏰

Time of Use

Peak / off-peak rates

What type of system are you after?

1 · What matters most to you?

This changes the system we recommend, not just the wording. You will see what each one produces before you choose.

⏱️

Fastest payback

The smallest sensible system, so every dollar spent works as hard as possible.

💰

Biggest savings

Sized for the largest yearly saving without paying for output you would only export.

🔒

Energy independence

A larger system and battery, so more of your power comes from your own roof and less is bought from the grid. You stay connected to the grid

2 · What are you looking at? *

☀️

Solar Only

Reduce daytime bills

⚡

Solar + Battery

Maximum savings

🔋

Battery Only

Store cheap energy

What size solar system do you want?

Choose based on your roof space and energy goals. Not sure? 6.6kW is the most popular choice for a typical home.

Not sure what size you need? As a rough guide, a small home of 1-2 people typically uses 8-14 kWh a day, a family of 3-4 uses 16-25 kWh, and a large or all-electric home with a pool or EV uses 30 kWh or more. Your bill is a better guide than any average, and we use it to check the size you pick actually fits.

9 × 475W panels

6.6

14 × 475W panels

17 × 475W panels

22 × 475W panels

28 × 475W panels

32 × 475W panels

42 × 475W panels

◎

Not sure, size it for me

We will work it out from your usage

💡 Rule of thumb: Every kW of solar generates around 4.2 kWh/day in Sydney. A typical home uses 15 to 25 kWh/day.

What size battery do you want?

Choose based on how much evening usage you want to cover. The recommended size below is sized to your own usage.

kWh

💡 Coverage guide: Divide the usable kWh by your evening usage to estimate how much of an evening it covers. Each option below shows its own coverage.

A few details about your home

These affect your installation cost and solar production estimate.

Electricity connection *

🔌

Single Phase

Most homes

⚡

Three Phase

Larger / newer homes

Storeys

🏠

Single

🏡

Double

🏢

Other

Roof type

🏗

Tin / Colorbond

Easiest install

🧱

Terracotta Tiles

⬛

Concrete Tiles

📐

Flat Roof

Tilt frames used

🪨

Slate / Other

We'll confirm on-site

Main roof direction

⬆️

North

Best output

↗️

NE / NW

Good output

↔️

East / West

Reduced output

Not sure? Check which way your house faces on Google Maps.

Any shading on your roof? (optional)

🌞

No shading

🌤️

Some shading

🌳

Significant

Do any of these apply? (optional, tap all that apply)

🏊

Pool

🚗

Electric vehicle

🚿

Electric hot water

Planning to add anything in the next few years? (optional, we leave room for it)

🚗

Electric vehicle

🏊

Pool

🔥

Replacing gas

❄️

Air conditioning

🏠

Extending home

Almost there, just two quick questions.

When are you looking to install?

Most installations happen 2-3 weeks after you sign, once your network approval comes through.

🔥

Within 1 month

📅

1-3 months

🗓

3-6 months

🔍

Just researching

How did you hear about us?

🔍

Google search

📘

Facebook

📸

Instagram

🏘

Saw a neighbour's

👥

Friend / Family

💬

Other

6.6kW Solar System

Recommended based on your usage and home details.

10,100

kWh generated per year

$2,100

estimated annual benefit

$52,500

10-year total benefit

Bill reduction

~75%

estimated

Payback

~5 yrs

then pure savings

Rebates included

included in the price

This system is sized to cut a substantial share of your electricity bill, and its value grows as power prices rise.

Indicative estimate only. Exact system size, layout and pricing may vary based on roof space, switchboard proximity, shading, location and other site-specific constraints. All figures are subject to confirmation following your engineering review and consultation with our team.

Your recommended packages

STC government rebate already applied.

What's the difference? Premium uses quality entry-level brands at a competitive price. Platinum uses premium brands with advanced technology, longer warranties and better long-term performance.

All applicable rebates are included in these prices.

Why just these two? We install a small range of equipment deliberately. Fewer products means our installers know them thoroughly, we hold stock, and we can stand behind the warranty years from now. These two cover most homes well.

Looking for a different brand? Tell us what you have in mind →

Your full solar analysis

Estimate reference: - · savings shown as a range; your engineering review narrows it

📍 Your property

Your annual benefit

Annual electricity spend$7,200

Saving $2,100/yr 29% reduction

Estimated quarterly bill $750 → $225

Your payback timeline, 10 year view

Paying back

Clear savings from here

NowYr 5Yr 10

Total over ten years $52,500

Selected Package

Change →

Premium

Sungrow String Inverter

Full breakdown

System size6.6kW

System typeSolar

PackagePremium

System price$5,490

Annual benefit$2,100

10-year savings -

Payback period~5 yrs

Solar STC rebate $2,100

Annual generation10,100 kWh

Roof orientationNorth

PhaseSingle Phase

Roof typeTin / Colorbond

Indicative estimate only. System size, savings and pricing may vary based on roof space, switchboard proximity, shading, your location and other site-specific constraints. All figures will be confirmed following your engineering review and consultation with our team.

Want this sent to you?

Enter your email and we will send you a summary of your system size, savings estimate and package pricing. Or add your details to request a full engineered quote from our team.

Email * (to receive your summary)

Please enter a valid email address

Our team will be in touch to arrange your engineering review and consultation

You're all set

We'll send everything to your email shortly.

Quote summary

System6.6kW Solar

PackagePremium

Price$5,490

Annual savings$2,100

10-year savings$21,000

Payback~5 yrs

What happens next

We review your details

An engineer checks your roof, switchboard and network connection

Engineering assessment

Final system design and price confirmed in a written proposal

Your consultation

Nothing is fixed yet. This is where we can build a custom size, compare the packages, and cover site-specific needs such as bird mesh, EV charging or backup circuits

Nothing further is needed from you. If anything changes in the meantime, or you would like to bring the call forward, reply to the email we have just sent and we will pick it up from there.

❓ View FAQ

Start over and clear my answers

Estimate only. These figures are indicative, based on what you told us and modelled on typical Sydney conditions. They are not a formal quotation or a guarantee of savings. Your final price and output are confirmed after an engineering assessment and written proposal. Rebate values follow government schemes and market prices, which can change. Terms and privacy →

© 2026 Zero 4 Energy Pty Ltd · ABN 91 613 413 531 · NSW Contractor Licence 359730C. All rights reserved. This design tool, its content and underlying sizing and pricing methodology are the property of Zero 4 Energy Pty Ltd and are protected by copyright. No part may be copied, reproduced, reverse-engineered or used to build a competing tool without our written permission.