County L'Derry-based construction and property development company Heron Bros has made a significant seven-figure investment in The Electric Storage Company (TESC), a Belfast-based renewable energy firm.

Established in 2017, TESC provides smart energy solutions across Northern Ireland, Ireland and Great Britain. The company uses smart battery systems to store energy from renewable sources like solar and wind, helping domestic and commercial users cut electricity costs by more than 50%.

This investment will accelerate TESC’s growth, with plans to more than double its engineering and data science team to 35 over the next 2–3 years.

Speaking about the investment, Eddie McGoldrick, Director TESC said: "The Electric Storage Company combines Northern Ireland's expertise in power engineering, fintech and big data and we are now aiming to 'scale up' significantly to repeat our already successful smart approach to electricity usage across Ireland and GB.

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"Our team are delighted to now partner with one of Northern Ireland's leading construction and renewables development companies to fast track that growth. Our shared expertise in renewables and delivering innovative customer solutions for customers across the British Isles will bring lower costs to greener homes and businesses and help people to meet their net zero targets sooner."

Heron Bros, which operates across the UK, Ireland and Europe, brings strong experience in the renewable sector through its previous leadership role in Simple Power, a wind energy company in Northern Ireland. The new partnership will also support the expansion of TESC's PARIS platform (Predictive Analytical Renewables Integration System), which uses advanced data analytics to optimise the use of stored renewable energy in homes and commercial buildings.

This collaboration strengthens Heron Bros' position in sustainable construction and infrastructure, aligning with long-term goals to integrate renewable energy into the built environment.

Damien O'Callaghan, Group MD, Heron Bros said: "The combined strengths of Heron Bros and The Electric Storage Company will now offer an exciting and innovative proposition to help our customers on the path to net zero.

"According to recent research from leading management consultancy McKinsey's, real estate across homes and businesses accounts for about 40% of all Greenhouse gas emissions. It is our belief that by improving the efficiencies in real estate (both new construction and existing buildings) that most companies can realistically reduce more than half of their emissions between now and 2030. This significant investment and partnership are designed to help companies and individuals do just that."