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A quality 6.6kW solar system typically costs $4,500 to $7,000 in Australia after the federal STC discount is applied, while larger 10 to 13kW systems generally range from $7,000 to $12,000 (pricing current as at 2026). Your final price depends on the panel and inverter brands, your roof type and access, and whether any switchboard upgrades are needed. Adding a battery is a separate cost, usually $8,000 to $15,000 depending on capacity, though state rebates and interest-free loans can reduce this. Because Small-scale Technology Certificates are already factored into the figures above, the amount shown is your out-of-pocket cost, not a headline price before rebates. Mission Green provides a detailed, itemised quote after a free assessment of your roof, energy bills and eligibility for every rebate you qualify for.

Premium Tier 1 solar panels are built to last 25 to 30 years or more, and quality panels carry a 25-year performance warranty guaranteeing at least around 84.8% of their original output at year 25. Panels degrade slowly — typically about 0.5% per year — so a well-installed system keeps producing meaningful electricity well beyond its warranty period. The inverter is usually the first component to need replacing, generally after 10 to 15 years, which is normal and planned for. Longevity depends on panel quality, correct installation, and occasional cleaning to clear dust and debris. In Australian conditions, heat and UV exposure are the main stressors, which is why Mission Green installs panels rated for high-temperature performance and backs every installation with a workmanship warranty on top of the manufacturer cover.

Most Australian households save between $1,800 and $3,600 per year with solar alone, and adding a battery can lift total savings to roughly $3,000 to $5,200 per year. Your actual saving depends on four things: how much electricity you use, how much of your solar you consume during daylight rather than export, your system size, and your state electricity and feed-in tariff rates. Homes that use power during the day — or store solar in a battery for the evening — save the most, because they avoid buying expensive grid power at peak times. Feed-in tariffs for exported solar have fallen across most states, so self-consumption is now where the real value sits. Mission Green models your specific bill and usage pattern during a free assessment, so the estimate reflects your household rather than a generic average.

As a rough guide for an Australian home, a 6.6kW system suits 1 to 2 people, around 10kW suits a typical family, and 13kW or larger suits big households, all-electric homes, or those charging an electric vehicle. The right size depends on how much electricity you use and when, your roof space and orientation, and whether you plan to add a battery or EV later. Slightly oversizing is often worthwhile because it maximises self-consumption and future-proofs for electrification, but a system too large for your usage exports cheaply and pays back slowly. Many single-phase homes are limited to a 5kW inverter unless the local network approves more, which also shapes the design. Mission Green analyses your recent energy bills and daily usage patterns to recommend the optimal size during your free assessment. For a full walk-through of the honest, bill-first sizing method — including when a bigger system is genuinely worse value — see our guide: What size solar system do I need.

Yes. Solar panels generate electricity from daylight, not direct sunlight, so they keep producing on overcast days — typically at around 10% to 30% of their peak output depending on how heavy the cloud is. Modern panels are efficient enough to produce useful power in diffuse light, which is why solar works across every Australian climate, from sunny Queensland to cooler Tasmania. Output naturally varies through the day and across seasons, peaking near midday and in summer, but a correctly sized system is designed around your annual generation, not a single cloudy afternoon. Rain is actually helpful because it washes dust off the panels, improving output afterwards. Where consistent evening or bad-weather reliability matters, pairing solar with a battery stores surplus generation so you can draw on your own stored energy regardless of the weather outside.

Most residential solar installations are completed in a single day. Adding a battery typically extends this to one or two days, depending on the electrical work and any switchboard changes involved. Commercial installations are scheduled around system size and site complexity and usually take two to five days, sometimes longer for large rooftop or ground-mount projects. The physical install is only part of the timeline — before it there is a design and quoting stage and a grid-connection pre-approval, and afterwards an inspection and meter reconfiguration by your network before the system can export. From first contact to a fully switched-on system, most Australian households should allow a few weeks, much of which is network and paperwork lead time rather than on-site work. Mission Green manages the full schedule and keeps you updated at each stage.

Yes — Mission Green manages the entire administrative process, so you do not have to fill out a single form. That includes your grid-connection pre-approval and post-installation applications with your local network, any council permits where required, claiming applicable state rebates and interest-free loans, processing your Small-scale Technology Certificates, and preparing the electrical compliance and safety documentation. We also lodge the meter reconfiguration request so your new system can export and be credited correctly. Handling these steps ourselves is part of being an accredited retailer and keeps your project compliant and on schedule, because missing approvals are one of the most common causes of installation delays in Australia. You receive copies of all key documents and certificates for your records. All you need to do is approve your quote and choose an installation date.

Mission Green offers several ways to pay. Interest-free plans through Brighte are available from 12 to 60 months with no deposit (interest-free, not fee-free — establishment and account-keeping fees apply), green loans through Plenti at a disclosed, comparable rate (shown on our finance page), and there is a discount for paying by cash or card outright. For many households, the monthly finance repayment on a solar or solar-plus-battery system is less than what they were previously paying on electricity bills, so the system can be effectively cash-flow positive from day one. Eligible Victorian customers can also stack the Solar Victoria interest-free loan on top of the state rebate. Finance approval is subject to the lender criteria, and the right structure depends on your budget and how quickly you want to own the system outright. Mission Green walks you through the options and repayments for your specific quote before you commit.

Every Mission Green installation is covered by two layers of warranty. First, the manufacturer warranties on your equipment — typically 25 years of performance cover on panels, 10 to 25 years on inverters depending on the brand, and 10 years on batteries. Second, Mission Green own workmanship warranty, covering the quality of the installation itself, including mounting, wiring and system performance. This matters because in Australia the retailer who sells and installs your system carries obligations under the Clean Energy Council approved-seller framework and Australian Consumer Law, so you have a clear point of contact if anything needs attention. Warranty terms and conditions vary by manufacturer and product, and we provide the full documentation with your system. If a fault ever arises, Mission Green coordinates the claim and any service work on your behalf rather than leaving you to deal with the manufacturer directly.

Mission Green services all seven Australian states and mainland territories — Queensland, New South Wales, Victoria, South Australia, Western Australia, Tasmania and the Australian Capital Territory. Our network of SAA-accredited installers covers both metropolitan and many regional areas, and because rebates and feed-in tariffs differ from state to state, we tailor every quote to the incentives and network rules that apply where you live. Solar Accreditation Australia (SAA) accreditation and Clean Energy Council approved-seller status are required to access federal STCs and most state rebates, and Mission Green holds both. If you are outside a major metro area, we confirm coverage and any travel considerations for your postcode when you enquire. Wherever you are in Australia, the assessment, rebate handling and warranty support are the same — Mission Green manages the full process end to end.