Diamond Energy provides power to over 17,000 customers across Australia, generating electricity solely from renewable sources. The company claims to provide more sustainable power than their competitors, at an affordable price.
First established in 2004, Diamond Energy is a privately owned power generator and retailer supplying sustainable power from renewable sources to Australian consumers. It’s based in Prahran, Victoria with call centres in Melbourne.
Diamond Energy owns only renewable assets and stands in strong opposition to investment in fossil fuels. Because of this, it claims to be ‘beyond carbon neutral’, sourcing more renewable energy that its customers consume. It’s one of two Australian retailers in our survey to earn 10 out of 10 stars in the Green Electricity Guide.
Diamond Energy’s electricity tariffs vary between states, but its Thrive program offers customers the opportunity to get discounts on their bill through referrals, credits and bonuses, as well as other incentives. It’s also the first retailer to offer an export tariff for home batteries.
Diamond Energy is one of two energy retailers to earn a CHOICE recommendation.
Environmental
Diamond Energy is one of only two companies to have received a 10-star rating from The Green Electricity Guide in our survey.
The company own biogas power plants and over a thousand rooftop solar PV installations.
Diamond was the first company to offer an export tariff for residential solar batteries.
Diamond only owns renewable power generation assets, and does not buy in power generated from fossil fuels.
Customer service
22 (0.1%) customers of Diamond Energy made complaints against the company in 2021–22.
100% of calls made to Diamond Energy are answered within 30 seconds.
0.0% of callers hang up before their call is answered.
Diamond Energy energy sources
Text-only accessible version
How does Diamond Energy generate power? Solar: 64% Biogas: 21% Wind: 9% Rooftop PV: 6%
How we get our results
Green Electricity score
This score is based on the company’s Green Electricity Guide star rating.
Complaints score
This score is based on the number of complaints measured as a proportion against the number of customers. The higher the percentage, the better. Data via the Australian Energy Regulator – updated annually.
Call response score
This score is based on how likely the retailer is to answer a call within 30 seconds. The higher the percentage, the better. Data via the Australian Energy Regulator – updated annually.
Diamond Energy in the news – 2021
March – Power drinkers – Aussie brewer offers beer for excess solar energy – Carlton and United Breweries (CUB) in Australia, serving up Victorian Bitter to households who have rooftop solar power to spare, in what the companies involved believe to be a world first.
Diamond Energy in the news – 2020
December 2020 – Approval granted for electricity generation licence application – Diamond Energy Pty Ltd – The Commission issued an electricity generation licence to Diamond Energy Pty Ltd for the operation of a 1.06 megawatt solar generating plant, with a total export capacity of 400 kilowatts, located at Lot 399 Distillery Road Monash.
Diamond Energy in the news – 2019
November – Freedom from blackouts: first Q.Home case study – Hybrid home battery/inverter systems were the hot ticket at All Energy Australia last month. Those that provide back-up capacity will change the lives of people living in blackout-prone areas.
January – AEMO warns of ‘load shedding’ as grid pushed to breaking point – The Australian Energy Market Operator warned of possible “load shedding” – mandatory power cuts – of up to 40 megawatts in each of Victoria and South Australia late on Thursday.
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