Find the solar and battery option that fits your bill.

Understand enough to have a better conversation and avoid being pushed into the wrong thing. Enter a few bill details to compare starter, payback-focused, and larger bill-reduction options before booking a proper design check.

Use this guide to understand what size solar and battery option may suit your home. This is not a quote and does not provide final pricing. A solar professional must still confirm your roof layout, shading, switchboard, network approval, product availability, rebates and final design.
Compare my quote Compare brands Start with my bill Access Pro

Already have a quote? Jump straight to Compare My Quote, then come back to the bill section if you want the estimate to use your own usage.

Work through one step at a time

Use the buttons below to move through the guide. Start with home and bill details, then review options, compare quotes, check backup expectations, and use the questions before speaking with a solar professional.

Step 1 of 10

Your Home

Start with your postcode. The app will use broad location assumptions, and you can adjust the advanced assumptions if you know them.

Advanced assumptions

Advanced assumptions are optional settings that make the estimate more specific. You can leave them as they are for a first look, or open this section if you know more about the home, the panels being considered, or the local solar/rebate assumptions.

When to use this section: adjust these fields if a solar professional has told you your home is single phase or three phase, if your roof has noticeable shade, if you want to test a different panel wattage such as 475W or 600W, or if you want the STC zone and solar yield assumptions to better match your location. If you are not sure, leave the defaults and ask your installer to confirm them.
Enter a postcode to auto-set likely state, solar yield, and STC zone factor. Confirm exact STC zone using the official CER postcode zone list.
Panel count currently uses 440W modules. You can change the panel wattage in Advanced assumptions, or choose custom to add your own preferred panel size.
Check official CER postcode zone list

Your Bill

Use more than one bill where possible. Multiple bills smooth out seasonal heating/cooling, holidays, and one-off usage spikes, so the options are less likely to be oversized or undersized.

No bill uploaded. If upload is blocked by your browser, enter the bill rows manually below. Check extracted values before relying on them.
Privacy note: in this standalone version, uploaded bills are read in your browser to help fill the bill fields. The app does not intentionally upload, save, or store your bill file or personal information on a server. Your file may still remain wherever you keep it, such as your device, downloads folder, email, cloud storage, backups, or browser temporary storage.
Bill period Start date End date Days Usage kWh Bill amount $
Advanced bill assumptions

Leave these as defaults for a first look, or adjust them if you know the rates from the bill.

Import tariff

Look for general usage, anytime usage, peak usage, or energy charge. It is usually shown as cents per kWh, for example 30c/kWh means enter 0.30.

Feed-in tariff

If you already have solar, look for solar feed-in, export credit, or feed-in credit. If it says 4c/kWh, enter 0.04.

Daily supply charge

Look for supply charge, service charge, daily charge, or fixed charge. If it says 129c/day, enter 1.29.

Check the details

Use GST-inclusive rates where possible. If your bill has peak, off-peak, shoulder, controlled load, or demand charges, use the main household usage rate as a simple first estimate.

Your Goal

Pick the outcome that matters most. The recommended card will adjust to match it.

What payback means: payback is the estimated number of years for bill savings to equal the estimated net system cost after assumed rebates. It is a simple guide only; it does not include finance costs, tariff changes, maintenance, battery degradation, or future energy price changes.

Estimate Summary

These numbers update from the bill, postcode and advanced assumptions above.

Want to change these figures? Update your bill rows, postcode/region, tariff assumptions or panel wattage. The summary will recalculate automatically.
Edit bill usage and bill amount Edit postcode / home details Edit advanced assumptions

Your Options

These are screening options only. Use them to decide what is worth designing properly.

How the savings are estimated: the app annualises your bill usage, estimates how much solar is used in the home, how much battery energy can shift into the evening, and how much is exported. Annual after bill is the estimated 12-month grid import cost plus 365 days of supply charges minus yearly feed-in credit. Annual saving is your current estimated annual bill minus that annual after bill.
Rebate disclaimer: STC values, federal battery discounts, and state rebates are estimates based on the current year and the assumptions in this tool. Scheme rules, certificate prices, postcode zone factors, eligible products, and available funding can change, so rebates must be confirmed before a customer quote or purchase decision.

Customer Summary

A print-friendly guide to show an installer, retailer, or supplier what sort of system you are exploring.

Compare My Quotes

Enter up to three solar or battery quotes side by side. The app compares each quote against the nearest guide option so you can see size, price, payback and follow-up questions in one place.

Quote 1

Quote 2

Quote 3

What this checks: rough system size, battery size, claimed savings, simple payback and whether each quote appears broadly similar to the generated options. It cannot confirm roof fit, product quality, installer workmanship, finance terms, hidden exclusions, network approval, rebates, or whether the price is fair for the actual site work.

Compare Brands

Pick the product type and choose up to three brands. This gives you an evidence-based snapshot: warranty, Australian support presence, warranty pathway, technical support, likely price position, and what the quote should clearly show.

Important: this is a consumer guide, not a brand ranking. It focuses on evidence you can ask to see: warranty terms, Australian support contacts, who handles claims, whether site attendance is available, current datasheets, CEC approval details and written inclusions.
Add your own notes

Battery Backup

A battery does not automatically mean your home will have power during a blackout. Backup must be designed, wired, and quoted as part of the battery system.

What backup means

Backup is when selected circuits can keep running from the battery when the grid is out. Some batteries are storage-only, some can back up selected circuits, and some systems can be designed for larger backup loads.

What it cannot do

Backup is not unlimited power. It only works while the battery has enough charge available, and large loads like ovens, ducted air conditioning, pool pumps, hot water, EV chargers, or multiple appliances may not run unless the system is specifically designed for them.

Switchboard work

Backed-up circuits usually need switchboard assessment and may need circuit separation, a backup changeover arrangement, labelling, testing, and Type A RCD/RCBO protection on altered or backed-up circuits.

When it is worth it

Backup can be valuable in blackout or brownout prone areas, or for essentials like fridge, lights, internet, medical equipment, garage doors, or water pumps. If outages are rare, the extra backup cost may not be worthwhile.

Backup cost reminder: ask the installer to quote backup separately from battery storage. Backup runtime depends on the battery charge level, battery size, solar generation during the outage, and which appliances are running. The final cost can change depending on switchboard space, existing RCD/RCBO types, which circuits are backed up, and whether extra board work is needed. A licensed electrician must confirm what is compliant for the site.

Questions To Ask When Getting Your Quote

Use these questions to compare quotes properly and avoid being rushed into a system that does not suit your home.

System and design

  • What system size are you recommending, and why does it suit my bill and usage?
  • How many panels are included, what wattage are they, and will they actually fit my roof?
  • Have shading, roof direction, roof pitch, setbacks, and usable roof space been checked?
  • What inverter are you using, and is it suitable for my home supply phase and network/export limit?

Battery and backup

  • Is the battery being recommended for savings, backup, or both?
  • If backup is included, which circuits are backed up and what will not run during an outage?
  • How long might backup last with normal use, and what happens if the battery is low when the outage starts?
  • What switchboard work, Type A RCD/RCBO upgrades, changeover equipment, testing, and labelling are included?

Price, rebates, and paperwork

  • Is this a fixed quote, and what could cause the price to change after site inspection?
  • Which rebates, STCs, battery discounts, or state incentives have been included, and are they guaranteed?
  • Are panel, inverter, battery, labour, switchboard work, monitoring, metering, and network application fees all included?
  • Will I receive a written quote, product datasheets, warranty documents, terms, cooling-off rights, and NETCC disclosures if applicable?

Company and after-sales support

Using subcontractors is not automatically a problem. The important thing is knowing who manages the work, what standards they require, and who remains responsible after installation.

  • Who is the retailer, who is the installer, and who do I call if something goes wrong?
  • Are you local, and if subcontractors are used, how are they selected, accredited, supervised, and held to your installation standards?
  • Who handles warranty claims, monitoring setup, faults, and service after installation?
  • Can I have everything promised in writing before I pay a deposit?
This is not a quote, customer contract, NETCC document, network approval, or final electrical design. Prices, rebates, STCs, roof fit, shading, switchboard capacity, export limits, and product availability must be checked by a solar professional.
Privacy Policy

Privacy Policy

Last updated: 5 June 2026. Replace the bracketed items before publishing this on a public website.

This Privacy Policy explains how [Business Name] handles personal information when you use this solar and battery options tool. It is written for the standalone consumer version of the tool.

What information this tool uses

The tool may use information you enter or upload, including electricity bill dates, bill amounts, energy usage, tariff rates, feed-in tariff, daily supply charge, postcode, state or region, home supply phase, shading estimate, panel wattage preference, preferred payback period, and any information visible in an uploaded bill file.

Electricity bills can contain personal information such as a name, address, account number, national meter identifier, retailer details, and usage history. Please only upload a bill if you are comfortable using it in this tool.

How uploaded bills are handled

In this standalone version, uploaded bills are read in your browser to help fill the bill fields. The tool does not intentionally upload, save, or store your bill file or personal information on a server controlled by [Business Name].

Your bill file may still remain wherever you keep it, such as your device, downloads folder, email, cloud storage, backups, or browser temporary storage. If this tool is later changed to use accounts, analytics, server-side PDF reading, lead capture, or installer referrals, this policy must be updated before that version is used.

How information is used

The information is used to estimate solar and battery coverage options, annual usage, possible annual savings, simple payback, panel count, estimated rebate assumptions, and a printable summary you can discuss with a solar professional.

The tool is a first-look estimate only. It is not a quote, customer contract, network approval, rebate approval, NETCC document, or final electrical design.

Sharing with installers, retailers, or suppliers

The standalone tool does not automatically send your information to installers, retailers, suppliers, or other third parties. If you choose to print, download, email, screenshot, or otherwise share the summary, you control what you share and who receives it.

If a future version includes installer matching, lead forms, contact requests, sponsored listings, or referral tracking, the tool should clearly explain what information is sent, who receives it, and whether any listing is sponsored or paid.

Storage, security, and access

Because this standalone version does not intentionally store uploaded bills or entered personal information on a server, [Business Name] may not be able to access, correct, delete, or recover information you enter into this version after you close it.

You should avoid uploading bills on shared or public computers. If you save, print, download, or share a summary, keep it secure because it may include information about your electricity usage, postcode, and preferences.

Contact and complaints

For privacy questions, requests, or complaints, contact: [Privacy Contact Name], [Business Name], [Email Address], [Phone Number], [Postal Address].

If you are not satisfied with the response, you may be able to contact the Office of the Australian Information Commissioner at oaic.gov.au.

What Happens Next

A proper design program and installer review should confirm the option before anyone relies on it.

1. Share a billUse a recent bill or interval data if available.
2. Check roof fitConfirm panel layout, shading, and usable roof area.
3. Check networkReview phase, export limits, voltage rise, and approval pathway.
4. Get a quoteConfirm products, rebates, warranties, terms, and final price.

Installer and Retailer Partners

This is a future pathway, not the advice itself. We are not listing partners yet. If partner listings are introduced, participation will be paid and each listing will be assessed and labelled against Prima Renewable Compass criteria so customers can see why a business is shown.

Listing clarity: Prima Renewable Compass partner listings are paid and clearly labelled. Businesses are assessed against Prima Renewable Compass criteria such as service area, experience, design process, disclosure standards and after-sales support. Paid participation does not replace these criteria.
Partner interest

Are you an installer?

If you value informed customers, this tool is being built to help people arrive with a clearer bill summary, system goal, backup expectations, and questions to ask before quote stage.

Potential partner criteria may include service area, NETCC status, battery experience, design process, warranty support, and after-sales service.

Retailer pathway

Are you a retailer?

This tool is designed to help customers understand their bill, compare rough system options, and arrive with better questions before they speak with a retailer.

For retailers, the value is a clearer conversation around product choice, availability, finance, warranties, installation arrangements, and whether the proposed system actually suits the customer.

Professional tool

Professional sizing option

We also have a professional sizing tool that can be used alongside design software such as OpenSolar, Pylon, or other design workflows. It is for sizing, coverage, costing, VRC, quote readiness, and customer option comparison.

Installers and retailers can use it to turn a consumer's rough summary into clearer quoting assumptions before committing time to full design, site checks, and final proposal work.