How Does Solar Work?

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What Size Solar System Do I Need in Sydney?

Compare 6.6 kW, 10 kW and larger systems using your bills, usage timing, roof, shading, future loads and local network settings.

Published 17 August 2026

Read the solar sizing guide
Rooftop solar panels installed on a Sydney home
Home battery storage units beside a residential solar energy system

More homeowner guidance

Are Solar Batteries Worth It in Sydney?

Understand battery value, payback factors, backup design and what to check before accepting a quote.

Read the battery guide

1. Solar Panels Capture Sunlight

Solar panels are made up of photovoltaic (PV) cells. These cells absorb sunlight, and the energy from the sunlight knocks electrons loose from their atoms, creating an electrical current.

  • Materials: PV cells are typically made from silicon, a semiconductor.
  • Key Process: This phenomenon is called the photovoltaic effect.

2. Inverters Convert Energy

The electricity generated by solar panels is direct current (DC). Since most homes and businesses use alternating current (AC) electricity, an inverter is used to convert DC into AC.

3. Power Your Home or Business

The AC electricity is sent to your home's electrical panel (circuit breaker box), where it powers your appliances and devices.

  • Be stored in a battery (if installed).
  • Go back to the grid (if your system is grid-tied), earning you credits through a system called net metering.

4. Optional Battery Storage

If your system includes a solar battery, any excess energy generated during the day can be stored for use at night or during a power outage. Batteries increase energy independence and ensure a more stable power supply.

5. Monitoring and Maintenance

Modern solar systems often include monitoring tools to track energy production and usage. Solar panels require minimal maintenance, usually just occasional cleaning to remove dirt or debris.

Advantages of Solar Power

Discover solar power's unmatched benefits: renewable energy, reduced bills, and eco-friendly solutions.

Abundant sunlight: Renewable energy

Cost savings: Lower bills

Enhanced property value: Attractive investment

Eco-friendly: Reduces carbon footprint

Energy independence: Grid alternative

Minimal maintenance: Long-lasting systems

Helping You Make the Right Choice

What causes price variations in solar quotes?

How much can I save after installing solar?

Are government rebates available?

How do I choose the right solar installer?

What should I look for in solar panels?

Why choose solar power?

Make Solar Affordable with Rebates and Loans

1. Solar STCs

Eligible small-scale solar installations can create Small-scale Technology Certificates. Retailers commonly assign their value as an upfront discount shown in the quote.

2. Battery Support

The Australian Government's Cheaper Home Batteries Program supports eligible small-scale batteries through the Small-scale Renewable Energy Scheme. Current rules apply at installation.

3. Eligibility Matters

Approved products, installation requirements, system size, connection timing, location, and installer eligibility can affect support. Check the current program before proceeding.

4. Check the Quote

The proposal should identify the certificate or program value applied, the assumptions used, what happens if eligibility changes, and the price before and after support.

5. Finance Is Separate

A rebate or certificate discount is different from a loan. Compare the total amount repayable, fees, interest, term, and ownership conditions before selecting finance.

6. Recheck Current Programs

Federal, state, council, and retailer programs can open, close, or change. Use official government sources and confirm eligibility when the quote is prepared.