Check your rebate eligibility
Start With Knowledge, Not a Sales Pitch
For many Australians, the first real education they get about solar happens during a sales conversation. A door knocker arrives, a phone call comes through, or a mate recommends their installer. Suddenly you are trying to absorb new technical information while also deciding whether to trust the person delivering it. That is not a great position to be in when making a decision worth thousands of dollars.
This is exactly why we built Why Solar. We believe homeowners deserve to understand solar before anyone tries to sell them a system. When you walk into an installer conversation already knowing how your household uses power, what system size actually means, and why inverter and warranty choices matter, everything changes. Sales conversations slow down. Your questions become more specific. Quotes start to make sense. And red flags are far easier to spot.
You do not need to become an electrical engineer or memorise grid regulations. But understanding the basics, like your daily electricity usage, when you use the most power, and what problem you are actually trying to solve, gives you a genuine advantage. Homeowners who ask clear, informed questions are more likely to get a system that suits their household, avoid unnecessary upgrades, and feel confident about what they are paying for.
Why Solar is not an installer. We do not earn commissions on equipment. Our role is to explain how solar works in plain language, help you understand your options, and connect you with trusted installers when you are ready. That separation matters, because good advice should never depend on a sale.
The guide below walks you through each step of buying solar. Before you dive in, take a few minutes to gather your recent electricity bills and think about your household energy patterns. Armed with that information, every step that follows will be clearer and more productive.
Check Your Rebate Eligibility
Enter your postcode to check rebate eligibility in your area.
Over 3.6 million homes already claiming rebates
5 Steps to Buying Solar
Understand Your Usage
Check your electricity bills for daily/quarterly usage (in kWh). This helps determine the right system size.
- checkFind your daily kWh usage on your bill
- checkNote when you use most power (day vs evening)
- checkConsider future changes (EV, pool, family growth)
Get Multiple Quotes
Get at least 3 quotes from different installers. This helps you understand fair pricing and compare offerings.
- checkUse our rebate quiz to get matched with installers
- checkEnsure quotes are for similar equipment
- checkAsk for itemised quotes showing all components
Compare Equipment
Not all solar panels and inverters are equal. Focus on tier-1 brands with solid warranties.
- checkCheck panel efficiency and warranty terms
- checkResearch inverter brands and monitoring features
- checkAsk about panel degradation rates
Check Installer Credentials
Only use SAA-accredited installers (formerly CEC). Check reviews and ask for references from recent jobs.
- checkVerify SAA accreditation number
- checkCheck Google reviews and ask for references
- checkAsk how long they have been in business
Review the Contract
Read the full contract before signing. Ensure all promises are in writing.
- checkCheck payment terms (avoid large deposits)
- checkVerify warranty details are documented
- checkUnderstand the installation timeline
What Size System Do You Need?
| Daily Usage | System Size | Panels | Typical Home |
|---|---|---|---|
| Low (10-15 kWh/day) | 5kW | 10-12 | Apartment, 1-2 people |
| Medium (20-30 kWh/day) | 6.6kW | 12-15 | Average home, 3-4 people |
| High (30-45 kWh/day) | 10kW | 18-22 | Large family, pool |
| Very High (45+ kWh/day) | 13kW+ | 24-30 | Large home, EV, multiple AC |
Tip: Its often worth going slightly larger if roof space allows. The cost per kW decreases with larger systems, and youll have room for future electricity needs (EV, battery, etc.).
Red Flags to Watch For
warningHigh-pressure sales tactics
Legitimate installers dont pressure you to sign today or offer one-day-only deals.
warningUnusually low quotes
If a quote is significantly cheaper, check the equipment quality. Cheap systems often use lower-tier components.
warningLarge upfront deposits
Reputable installers typically ask for 10-20% deposit, not 50%+. Full payment should only be after installation.
warningVague equipment details
The quote should clearly specify panel brand, model, inverter brand, and all components.
warningNo SAA accreditation
Without SAA accreditation (formerly CEC), you wont receive STCs (government rebate). This is non-negotiable.
warningDoor-to-door sales
Be cautious of unsolicited door knockers. They often have high-pressure tactics and inflated prices.
Cheap quotes are tempting, but they often come from companies operating on razor-thin margins. Over 200 solar installers have collapsed in Australia since 2010, leaving an estimated 1 in 6 solar homes without a workmanship warranty. Before signing, check our collapsed solar companies tracker to see if the installer (or their parent company) has a history of trading under different names.
See How Much You'd Save
Enter your postcode to see your estimated rebate amount.
Over 3.6 million homes already claiming rebates
Questions to Ask Installers
Helpful Resources
Panel Reviews
Compare top solar panel brands.
paymentsCost Guide
See typical prices by system size.
savingsRebates Guide
Understand available rebates.
comparePanel Comparison
Compare LONGi, Jinko, Trina & more side by side.
calculateSavings Calculator
Calculate your potential solar savings.
boltFeed-in Tariffs
Compare export rates across all states.
The next step
If you have any questions about the information in this guide, feel free to get in touch:
Email: andy@whysolar.com.au
Tel: +61 455 221 921
If you're considering solar panels or batteries for your home, Andy and the team can help you get quotes from trusted, pre-vetted local installers:

Written by
Andy McMasterSolar Installer Partner Relations
Connects homeowners with trusted, vetted solar installers across Australia. Andy works directly with installation companies to ensure quality standards and helps homeowners navigate the quoting process.
Learn more about Andy McMaster