Buying Guide

How to Buy Solar Panels

Everything you need to know before buying solar. Follow this guide to get a quality system at a fair price.

Check your rebate eligibility

location_on
Headshot of Andy McMaster, Solar Installer Partner Relations at Why Solar
Written by Andy McMaster
·January 2026·12 min
Share with a mate

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.

location_on

Check Your Rebate Eligibility

Enter your postcode to check rebate eligibility in your area.

location_on
verifiedVerified Local Installersthumb_up100% Free ServiceshieldNo Obligation

Over 3.6 million homes already claiming rebates

5 Steps to Buying Solar

1

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)
2

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
3

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
4

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
5

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 UsageSystem SizePanelsTypical Home
Low (10-15 kWh/day)5kW10-12Apartment, 1-2 people
Medium (20-30 kWh/day)6.6kW12-15Average home, 3-4 people
High (30-45 kWh/day)10kW18-22Large family, pool
Very High (45+ kWh/day)13kW+24-30Large 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.

calculate

See How Much You'd Save

Enter your postcode to see your estimated rebate amount.

location_on
verifiedVerified Local Installersthumb_up100% Free ServiceshieldNo Obligation

Over 3.6 million homes already claiming rebates

Questions to Ask Installers

1What panel and inverter brands do you recommend and why?
2Are you SAA accredited? Can I have your accreditation number?
3What is included in the quote? Is there anything extra?
4How long will installation take?
5Who handles the grid connection paperwork?
6What warranties apply to the panels, inverter, and installation?
7Can I see examples of recent installations?
8What monitoring system is included?
9What happens if there are issues after installation?
10Are you the installing company or a broker?

Helpful Resources

The next step

If you have any questions about the information in this guide, feel free to get in touch:

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:

location_on
Headshot of Andy McMaster, Solar Installer Partner Relations at Why Solar

Written by

Andy McMaster

Solar 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
Share with a mate
Up to $5,350 in rebates • Battery rates change in 63 days