Sustainable Energy Infrastructure

What Sustainable Energy Infrastructure does

Sustainable Energy Infrastructure (SEI) is an Australian private infrastructure investment trust, established in 2018, that invests in, develops, owns, and operates a diversified portfolio of distributed sustainable energy assets across regional Australia. Headquartered in Adelaide with a registered office in Barton (ACT) and managed by PATRIZIA (formerly Whitehelm Capital) on behalf of a consortium of Australian superannuation funds, SEI operates 22 generation and distributed energy assets spanning approximately 80MW AC of distributed solar across 17+ sites, 42MW of battery energy storage across 11 sites, plus cogeneration, biomass, biogas, landfill gas, and compressed natural gas (CNG) refuelling facilities across New South Wales, Victoria, South Australia, Queensland, and Tasmania.

The company's core technology stack combines mid-to-large scale solar PV (utilizing LONGi bifacial modules with FIMER, Sungrow, and Huawei inverters), grid-connected BESS with 2-hour duration batteries for frequency regulation and peak shaving, gas-turbine cogeneration with heat recovery steam generators (HRSG), bagasse and biomass generation, landfill methane capture, and CNG refuelling infrastructure. SEI develops projects directly through long-term co-development partnerships — notably with Yates Electrical Services Group (YES Group, 2020) for solar farms and ACEnergy plus ACLE Services (2024) for the Distributed BESS platform. Asset operations are managed in-house by an 11–50 person team with deep technical tenure in PPAs, EPC arrangements, and Australian energy regulation.

SEI's revenue model is asset-based and recurring: long-term Power Purchase Agreements (PPAs) with commercial and industrial customers and government counterparties, electricity sales into Australia's National Electricity Market (NEM), and monetization of Large-scale Generation Certificates (LGCs) and Australian Carbon Credit Units (ACCUs). The company serves three primary segments: (1) C&I customers seeking on-site energy infrastructure and emissions reduction (e.g., Qenos, Coopers Brewery, ISIS Sugar Mill, QPM), (2) renewable energy developers requiring capital partners and EPC certainty, and (3) institutional investors (the underlying superannuation fund consortium) seeking mid-market infrastructure exposure with strong ESG credentials. Bespoke, project-by-project pricing is not publicly disclosed. In April 2026, CleanPeak Energy Holdings signed an agreement to acquire 100% of SEI.

Name

Sustainable Energy Infrastructure

Legal name

Sustainable Energy Infrastructure Pty Ltd ACN 625 686 651 as trustee for the Sustainable Energy Infrastructure Trust ABN 50 746 683 694

Website

https://sei.com.au

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

11–50 employees

Short description

Sustainable Energy Infrastructure is an Australian infrastructure investment trust that owns and operates 22 distributed energy assets across regional Australia, including 80MW of solar and 42MW of BESS, serving C&I customers, renewable developers, and government clients via long-term PPAs.

Ownership category

akta.pro rank

Product category

Renewable Energy Infrastructure

NAICS

Electric Power Generation (22111), Solar Electric Power Generation (221114), Biomass Electric Power Generation (221117)

SIC

Electric Services (4911), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Renewable Energy Infrastructure (FSAAAKAG)

akta.pro secondary industries

Electrical Systems O&M (Substations, Transformers, Switchgear, Protection & Controls) (EUAMAGAH), Real Assets — Energy & Power Infrastructure (Renewables, Conventional, Storage) (FSAHAIAD)

Keywords

• Distributed energy infrastructure
• Battery energy storage
• Solar farm investment
• Cogeneration facilities
• Renewable energy management

Headquarters

HQ city

Sainte-adelaide-de-pabos

HQ country

Canada

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. Infrastructure Investment Returns: SEI operates as an infrastructure investment trust generating returns through ownership and operation of distributed energy assets including solar, BESS, cogeneration, biomass, biogas, and CNG facilities. Revenue is derived from long-term power purchase agreements and energy sales into the National Electricity Market.
2. Energy Generation and Sales: Revenue from electricity generation and sales through owned solar farms and battery storage systems, selling power into Australia's National Electricity Market under long-term PPAs.
3. Carbon Credits and Renewable Energy Certificates: SEI generates revenue through Australian Carbon Credit Units (ACCUs) and Large-scale Generation Certificates (LGCs) from renewable energy assets.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Sustainable Energy Infrastructure (SEI) is an Australian infrastructure investment trust that develops, owns, operates, maintains and manages a diversified portfolio of distributed sustainable energy assets across regional Australia. Its offerings include mid-large scale distributed solar farms (80MW AC across 17+ sites), battery energy storage systems (BESS, 42MW), cogeneration facilities (gas turbine with HRSG), biomass and biogas generation, landfill gas generation, and compressed natural gas refuelling facilities, with electricity sold into the National Electricity Market under long-term power purchase agreements.

Product overview

Sustainable Energy Infrastructure (SEI) is a sustainable energy infrastructure investment and operating company that owns and manages a diversified portfolio of distributed energy assets across regional Australia. The company operates as a platform of complementary products including distributed solar farms (80MW across 17+ sites), battery energy storage systems (BESS), cogeneration facilities, compressed natural gas refuelling stations, and biomass/biogas/landfill generation assets. SEI provides end-to-end solutions including investment, development, ownership, operation, and maintenance of energy infrastructure, serving commercial and industrial customers, joint-venture partners, and private energy infrastructure developers through partnerships with companies like YES Group, ACEnergy, and ACLE Services.

Differentiator

Problem solved

Functional benefit

Products and services

• Distributed Solar Farms Mid-to-large scale distributed solar energy facilities across regional Australia developed, owned and operated by SEI, including 17+ sites across South Australia, Victoria, New South Wales and Queensland with combined capacity of approximately 80MW AC. Facilities range from 1.9MW to 5MW capacity and utilise bifacial solar modules on tracking systems with leading inverter technologies (FIMER, Sungrow, Huawei) and LONGi bifacial modules, selling electricity into the National Electricity Market under long-term PPAs.
• Battery Energy Storage Systems (BESS) Battery energy storage systems using leading-edge technology deployed by SEI for stand-alone backup power for microgrids, load balancing in the National Electricity Market, renewable energy integration, grid stability, frequency regulation, peak shaving and UPS capabilities. Includes distributed DBESS facilities co-developed with ACEnergy and BESS co-located with SEI's solar farms, with combined portfolio capacity of 42MW across 11 sites and 17.5MWh combined capacity across solar farms and standalone BESS sites.
• Cogeneration Cogeneration facilities operated by SEI that produce electricity and steam simultaneously using gas turbine technology with heat recovery steam generators (HRSG), serving industrial customers including a 25MW bagasse cogeneration facility at ISIS Sugar Mill producing approximately 98,500 MWh of electricity per annum, a 21MW facility at Qenos supplying up to 171 GWh of electricity annually with 88 tonnes of steam/hour, and a 4.4MW facility at Coopers Brewery supplying approximately 3MW of electricity and steam.
• Compressed Natural Gas (CNG) Refuelling Facilities Compressed natural gas refuelling facilities developed, owned and operated by SEI for dedicated CNG buses, providing a cleaner burning fuel alternative to conventional diesel. Facilities located in Brisbane (serving Brisbane City Council's bus fleet at the Willawong depot) and Sydney (serving Transport for NSW fleet operations).
• Biomass and Biogas Generation Biomass and biogas generation assets owned and operated by SEI that produce renewable electricity and steam from organic waste materials. The portfolio generates approximately 1,551,431 MWh of electricity, abates 1,037,070 tonnes of CO2, and produces 476,974 Large-scale Generation Certificates (LGCs) and 334,753 Australian Carbon Credit Units (ACCUs) since SEI ownership.
• Landfill Gas Generation and Flare Facilities Landfill gas generation and flare facilities operated by SEI that capture methane gas from landfills for energy production, reducing greenhouse gas emissions. Two landfill gas generation facilities in Tasmania supply electricity to Diamond Energy under a Power Purchase Agreement signed in March 2019, included in the founding AGL asset portfolio acquisition.

Quantifiable outcome

• Seventeen solar sites producing 200,000 MWh annually, powering 27,000+ homes
• +3 more outcomes

Named customers7 records

Segments3 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• ACEnergy (ACE)coreStrategic or Co-development Partner · 24 May 2024Development agreement to build, own and operate a portfolio of Distributed Battery Energy Storage System (DBESS) facilities across regional Australia. First phase comprises 7 ~5MW DBESS projects with 2-hour batteries (~35MW/70MWh) in regional Victoria. Second phase expected to deliver 20 additional DBESS projects (100MW/200MWh) across SA, Victoria, and NSW.
• ACLE ServicescoreImplementation/ SI/ Consulting Partner · 24 May 2024EPC contractor providing full-wrap Engineering, Procurement and Construction services for DBESS projects on a long-term O&M contract basis. Has completed 25+ projects in regional Victoria with expertise in utility-scale PV solar and battery storage deployment.
• Yates Electrical Services Group (YES Group)coreStrategic or Co-development Partner · 21 September 2020Long-term agreement to develop, own, operate, maintain and manage a platform of mid-large scale solar farm projects in regional Australia. First phase delivered up to 20MW of new solar farms across South Australia and Victoria. Partnership has resulted in 17+ solar farms (80MW) and BESS facilities across three states.
• Diamond EnergyminorStrategic or Co-development Partner · 1 March 2019Power Purchase Agreement for purchase of electricity from SEI's two landfill gas generation facilities in Tasmania. Diamond Energy is an accredited wholesale electricity market participant and licensed independent electricity retailer.
• AGL Energy LimitedminorStrategic or Co-development Partner · 11 September 2018Acquisition of AGL's portfolio of 18 regional, small-scale generation and compressed natural gas refuelling assets including cogeneration, biomass, biogas, gas generation, landfill generation, landfill flare facilities, and CNG refuelling assets located across Australia.
• Brisbane City CouncilminorChannel Partner/ Reseller/ DistributorPartnership for development and operation of CNG refuelling facilities including the Willawong bus depot, providing cleaner burning fuel for Brisbane City Council's bus fleet.
• Transport for NSWminorChannel Partner/ Reseller/ DistributorPartnership for development and operation of CNG refuelling facilities for Transport for NSW fleet operations.

Scale indicators10 records

Recent moves5 records

Expansion highlights4 records

Emerging players

• TagEnergy: Global renewable energy developer with significant Australian wind, solar and battery storage pipeline. Comparable to SEI in developing and owning utility-scale and mid-scale renewable generation plus BESS in Australia.
• Edify Energy: Australian renewable energy developer behind major solar and battery projects (e.g., Daydream, Hayman). Comparable to SEI's ACEnergy DBESS partnership in developing mid-to-large scale solar plus BESS assets across regional Australia.

Broad incumbents

• Infigen Energy (Iberdrola Australia): Australian wind and battery energy business owned by Iberdrola. Comparable to SEI as a renewable energy asset owner with a mix of wind, solar and BESS in the NEM, though at much larger scale.
• Origin Energy: Major integrated Australian energy company with generation, retail and renewables (including batteries and solar). Comparable as a broad incumbent that divested legacy distributed assets (the SEI portfolio) but continues to compete in the same NEM and distributed energy markets.
• APA Group: ASX-listed major Australian energy infrastructure business owning and operating gas pipelines, wind farms, solar and battery assets. Comparable as a large-scale, long-duration infrastructure investor in renewable energy assets across Australia.
• EnergyAustralia (CLP Group): One of Australia's largest integrated energy retailers and generators with a growing renewables and BESS portfolio. Comparable as a broad incumbent operating generation, retail and increasingly distributed battery assets in the same NEM market as SEI.

Direct peers

• Genex Power: ASX-listed renewable energy and battery storage developer/operator focused on Australia, with major BESS projects (e.g., Bouldercombe, Kidston). Comparable to SEI in its mix of solar, BESS and grid-scale generation assets operating in the NEM.
• ESCO Pacific: Australian solar and battery storage developer focused on mid-scale utility and commercial projects. Comparable to SEI's YES Group solar partnership in delivering mid-large scale distributed solar plus BESS across regional Australia.
• CleanPeak Energy: Australian distributed energy and behind-the-meter specialist that signed an agreement to acquire SEI in April 2026. Directly comparable as a distributed generation, BESS and C&I energy infrastructure owner-operator serving commercial customers across Australia.
• Tilt Renewables: Australian renewable energy generator with wind and solar assets (now owned by Mercury NZ / Powering Australian Renewables). Comparable to SEI as a renewable generation owner-operator with contracted revenues and Australian geographic footprint.

Market position

Strengths5 records

Weaknesses2 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sustainable Energy Infrastructure