Diamond Energy — Plans & Profile

· Rates sourced from CDR energy plan data. Updated daily by Bill Hero.

About Diamond Energy

Diamond Energy is a Melbourne-based independent electricity retailer founded in 2004. It consistently earns 5-star ratings in Greenpeace's Green Electricity Guide and has placed first in CHOICE's Best Electricity Provider rankings. Diamond sources more renewable energy than its customers consume (beyond carbon neutral) and offers accredited GreenPower options via its Diamond Pure Plus plans with competitive solar feed-in tariffs. Its base rates are typically higher than the cheapest market offers. Diamond operates in VIC, NSW, SA, and QLD.

Bill Hero is an independent comparison service: we list every retailer that publishes pricing through CDR, and we don't take placement fees from Diamond Energy or any other retailer. Rates below are sourced from CDR and refreshed daily.

Provider Profile

Customer Count (Energy)

12,076

0.2% market share

As of 2026

Founded

2004

Complaints Rate (AER)

0.16%

Fewer complaints than 85% of retailers

Q1: Best

2026 AER report

Australian Ownership

partial

Diamond Energy is an Australian private company owned by its management team and small investors, with a minority stake (approximately 42 percent) held by SunPower Corporation, a NASDAQ-listed US solar panel manufacturer (majority-owned by TotalEnergies SE of France). The company remains Australian-operated from its Melbourne base.

Generation Assets

Owns renewable generation plants in northern Victoria. Additionally purchases power from third-party renewable generators (e.g. Starfish Hill Wind Farm SA) and aggregates rooftop solar exports from thousands of customers nationwide.

GreenPower

Yes — accredited

Reputation Scores

ProductReview

★★★★☆

4.1

119 reviews

Trustpilot

No data

Google

No data

Customer Reviews (0)

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Energy Plans

Electricity Plans (176)

No plans available for this area.

Frequently Asked Questions

How many plans does Diamond Energy offer?▾
Diamond Energy offers 176 plans in Australia (0 electricity, 0 gas), based on Consumer Data Right (CDR) data updated daily by Bill Hero.
Does Diamond Energy offer both electricity and gas?▾
Bill Hero does not currently have any plans on file from Diamond Energy. Plan data is sourced from the Consumer Data Right (CDR) energy API and refreshed daily.
Is Diamond Energy a major or smaller retailer?▾
Diamond Energy is a smaller-scale retailer in Bill Hero's comparison, with 176 plans on offer. Smaller retailers often compete on price or service rather than breadth of plan options.
How often is Diamond Energy's plan data updated?▾
Bill Hero refreshes Diamond Energy's plan data daily from the Consumer Data Right (CDR) energy API. Pricing on this page reflects the latest published rates from Diamond Energy.

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