SOUTHERN CROSS ELECTRICAL ENGINEERING LTD — Capital/Financing Update 2025

Dec 18, 2025

ASX ANNOUNCEMENT & MEDIA RELEASE

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19 December 2025

Battery and other awards totalling $90m

• Awards received totalling $90m

• Works on Steel River East Battery Energy Storage System in NSW

• Other awards in education and water sectors

Awards

Southern Cross Electrical Engineering Limited (“SCEE Group”) is pleased to announce that various subsidiaries have received a range of awards in the renewable energy, education, and water sectors, as detailed below.

Steel River East Battery Energy Storage System

SCEE Electrical announces that, following the successful completion of an Early Contractor Involvement (“ECI”) phase, it has been awarded the detailed engineering scope by PLUS Grid Storage Partnership (“PLUS GS”) and is progressing through the final commercial stages for the Steel River East Battery Energy Storage System (“BESS”) project in Newcastle being built on Ausgrid’s NSW network. This project forms part of PLUS GS’s initiative to enable the development of grid-scale BESS sites across the distribution network and represents one of the first large-scale, distributionconnected deployments in NSW.

The scope of works Includes:

• Procurement of long-lead items.

• Progression of engineering to 100% completion.

• Construction commencement upon receipt of State Significant Development Approval.

SCEE Electrical will leverage the expertise of other SCEE Group businesses, including Trivantage Manufacturing for switchboards, MDE for communications, SEME Security for security, and Force Fire for fire systems.

The Steel River East project is expected to complete in mid-2027. This milestone follows SCEE Electrical’s successful delivery of the Synergy 500MW/2,000MWh BESS project in Collie, WA.

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Southern Cross Electrical Engineering Limited ABN 92 009 307 046 ASX: SXE

www.scee.com.au

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ACT Schools

Heyday has been awarded design and construct contracts for three school projects in the ACT:

• Bungendore High School by Hindmarsh Construction Australia Pty Ltd – This facility will accommodate approximately 600 students, with capacity to expand to 1,000 students, and the project comprises four buildings, including an administration building, a gymnasium, and agricultural facilities. Heyday’s scope includes electrical, communications, security, audio-visual services, and fire detection. The award also includes the refurbishment of the separate North Campus (formerly the local council building), which will provide temporary accommodation for 160 students for the 2026 school year. The facility is scheduled to open at the start 2027.

• Second College Gungahlin by Hindmarsh Construction Australia Pty Ltd - This new public college will initially cater for up to 800 students, with future expansion capacity up to 1,100 students. Heyday’s scope includes electrical, communications, and audio-visual services. The project is due for completion in late 2027, with opening scheduled for Term 1, 2028.

• Whitlam Primary School (Stage 1) by Icon Pty Ltd - The new public school will cater for Preschool to Year 6 and accommodate up to 780 students. Heyday’s scope includes electrical, communications, and audio-visual services. Stage 1 is due for completion in late 2026, with opening for Term 1, 2027.

Mount Morgan Water Supply Project

S.J. Electric has received an order from Haslin Constructions Pty Ltd for the design, supply and installation of electrical works including supply of the main switchboard for several pump stations and a pipeline for Queensland’s Mount Morgan Water Supply Project.

Comment

Commenting on the above, SCEE Group Managing Director Graeme Dunn said “I am pleased to be announcing another award in the renewable energy sector so soon after our recent delivery of Synergy’s Collie BESS project.

What is particularly pleasing, echoing my observation in our announcement to the ASX on 16 December 2025 of the awards of the DigiCo SDY1 Data Centre and Sydney Metro St Mary’s Station projects, is that in this Steel River East BESS project we will also be drawing on multiple businesses from across the group to the benefit of ourselves and our clients.

As these three projects exemplify, the SCEE Group has huge exposures to the three structural tailwinds of data centres, infrastructure and electrification, and our ability to leverage offerings in them across multiple disciplines will be a strong competitive advantage.”

Authorised for release by Graeme Dunn – SCEE Group Managing Director

Contact:

SCEE Group Head Office Level 15, 225 St Georges Terrace Perth WA 6000 T: +61 8 9236 8300

Jonas Fitzgerald Investor Relations, Lancaster Grove Capital E: Jonas.Fitzgerald@lgcapital.com.au T: +61 427 104 488

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