How It Works

The data is based on the number of completed solar installations eligible for STCs, covering systems up to 100kW in size. To help you find the most relevant information, we’ve made it easy to filter the results by system size and by state.

Filter by Installation Size

• 0-100kW All STC: View all installations across every eligible system size.
• 0-15kW Residential: See the top retailers specializing in residential solar installations.
• 15-40kW Small Commercial: Focus on companies delivering small commercial solar projects.
• 40-100kW Medium Commercial: Check out leaders in medium-sized commercial installations.

Each segment helps you understand which companies are excelling in the areas that matter most to you — whether you’re looking for a provider for your home or your business.

Filter by State

You can also narrow down the leaderboard to see the best performers in your region:

• New South Wales (NSW)
• Queensland (QLD)
• Victoria (VIC)
• South Australia (SA)
• Western Australia (WA)
• Australian Capital Territory (ACT)
• Northern Territory (NT)
• Tasmania (TAS)

This makes it easy to find local solar leaders with proven track records in your state.

Why Installation Count Matters

While total solar capacity (kW) tells part of the story, the number of installations shows how many customers a company has successfully served. A high installation count often reflects strong customer trust, widespread service coverage, and the ability to efficiently deliver quality solar systems at scale.

Choosing a retailer with a strong installation history can give you extra confidence in their experience, reliability, and ability to meet your solar needs — whether big or small.

What’s Different from the Volume Leaderboard?

Unlike the Volume Leaderboard, which ranks companies based on the total size (kW) of systems installed, the Count Leaderboard focuses purely on the number of installations completed. It does not include STC traders — only the retailers responsible for installing solar panels across the country.