Australian owned, based and operated. Every Zero 4 Energy system starts with your bills, your tariff and your roof geometry - designed to Australian Standards, installed by SAA-accredited installers using CEC-approved products only. If the numbers don't stack up for your property, we'll tell you that too.
Most solar journeys start with handing over your phone number to get a price. Ours starts with answers. Our design tool runs the same engineering logic our team would - your bill, your usage, your roof, current rebates - and shows you an indicative system, savings and payback in a few minutes. Every assumption is visible, and nothing is gated behind a sales call.
Enter a recent bill and your usage habits, and the tool sizes solar and battery to how you actually live - not a postcode average. Already know what you want? Skip straight to packages and pricing.
You see the system, the estimated savings, the payback and the rebates applied - with the working shown. A quote you can interrogate is a different thing from one you can only accept or decline.
You get the full indicative design before any contact details are asked for. Send it to our engineers when you're ready, or request a call and do it the traditional way - your choice.
⚡ Takes 30 seconds • No contact details required
Savings figures are indicative estimates only - by using the calculator you agree to the Tool & Calculator Terms.
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Before any hardware talk: what are you actually after? Fastest payback, maximum bill reduction, complete energy coverage, blackout backup - and what budget are we working within? The design target is yours; we engineer to it.
02
We work from your last bills and, where available, interval data - daily load shape, tariff structure, feed-in rate, and your network's export limit. No assumptions where measurements exist.
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Array layout from your actual roof geometry and shading. Systems designed to AS/NZS 5033, 4777, 5139 and 3000, with arrays oversized up to 133% of inverter rating where the yield justifies it.
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SAA-accredited installers only. We handle grid applications, metering, export approvals and rebate paperwork - STCs and the federal battery rebate applied to your price upfront, not claimed back later.
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Every system is commissioned against its design, with production and consumption monitoring options available so you can see exactly what it delivers. Backed by our 10-year installation and workmanship warranty on top of manufacturer warranties.
Reduce your electricity bills by offsetting your grid consumption. Once the system is paid off, you're generating your own power at effectively no marginal cost.
Minimise your reliance on the grid and its ever-rising prices by producing your own energy - a rightly sized system can cover most of your usage.
Clean generation from your own roof, cutting your household or business carbon footprint every daylight hour.
STCs discount solar upfront, and the federal battery rebate discounts storage (up to 50 kWh). Both are applied to your price, not claimed back later.
With a battery configured for backup, essential circuits keep running when the grid goes down - and your solar keeps recharging it.
No moving parts. Professional installation, an occasional inspection, and monitoring to catch anything early - that's the maintenance story.
Three ways in, from 6.6 kW to 100 kW - every one finalised against your usage before a price is put in writing. If none of them stacks up for your property, we'll say so.
SOLAR ONLY
475 W panels with Sungrow, Fronius or hybrid FoxESS inverters, from 6.6 kW residential to 100 kW commercial. The right entry point for daytime-heavy usage.
See solar packagesHYBRID · SOLAR + BATTERY
Hybrid inverters with FoxESS, Sungrow or Tesla Powerwall 3 storage - the configuration the federal battery rebate (up to 50 kWh) currently favours, and the strongest answer to evening usage.
See hybrid packagesBATTERY ONLY
Already have panels? FoxESS, Sungrow or Tesla Powerwall 3 retrofits let you keep the energy you're currently selling for cents - with the battery rebate applied upfront.
See battery optionsMost quotes in this industry are a system size and a price. Ours is a design brief - built around what you're trying to achieve and what you're comfortable spending. Before a proposal reaches you, our engineers have verified the variables that actually decide whether your system pays for itself:
The result: residential systems we design typically pay back in 3-7 years, and you'll see the assumptions behind that number in writing.
Design My System// REPRESENTATIVE DESIGN STUDY
Illustrative configuration - your design is produced from your own site data.
The rebate applies to battery capacity up to 50 kWh - larger systems can be installed, but only the first 50 kWh attracts the incentive - whether you're adding storage to existing solar or installing a new combined system. We calculate and apply it, plus STCs, directly to your upfront price and handle the paperwork.
Most residential systems we design pay back within 3-7 years depending on usage, system size and electricity rates - and we show you the assumptions behind your number.
For homes with high evening usage, usually yes - storing your excess generation typically beats current feed-in tariffs, and the federal rebate has shortened battery payback materially. For daytime-heavy homes, sometimes not yet. We'll tell you which you are.
Only SAA-accredited installers - registered electricians with additional solar design and installation training. Every install is commissioned against Australian Standards.
Four layers: product warranties per component (panels commonly 15-30 years, inverters 10-15, batteries ~10), a 25-30 year panel performance warranty, our 10-year installation and workmanship warranty, and Zero 4 Energy as your single point of contact coordinating manufacturer claims - on top of your Australian Consumer Law rights.
The rebate applies to the first 50 kWh of battery capacity. Larger systems can be installed, but capacity above 50 kWh attracts no incentive - and the rate steps down on a published schedule.
Typically 2-6 weeks depending on grid approvals, stock and scheduling. Most residential installs are then completed in a single day.
Tell us when suits and what it's about. One of our engineers will call you - no call centre, no hard sell.