Huawei Digital Power has commissioned Cambodia’s first-ever TÜV SÜD-certified grid-forming energy storage project, marking a key milestone in the country’s transition towards sustainable energy.

Huawei worked with energy provider SchneiTec, which previously developed Cambodia’s largest solar power plant.

This newly completed 12MWh energy storage project includes a 2MWh testbed dedicated to validating Huawei’s Smart String grid-forming ESS technology. The system has demonstrated its capabilities in stabilising the grid in both off-grid and weak-grid scenarios by facilitating the seamless integration of intermittent renewable energy sources.

The project has received certification from TÜV SÜD, marking Cambodia’s first grid-forming ESS deployment and laying a foundation for future capacity expansion and large-scale energy infrastructure development.

The project was jointly tested by TÜV SÜD, SchneiTec and Huawei. TÜV SÜD (www.tuvsud.com) verified the key technical capabilities of the ESS, including inertia response, high and low voltage ride-through, frequency support, and overload performance.

Huawei’s grid-forming technology achieved an inertia time constant (Tj) range of 3 to 20 seconds, well beyond the standard requirement of 3 to 12 seconds, enabling faster grid stabilisation.

The system effectively managed voltage fluctuations, maintaining grid stability during short-term voltage dips and surges. It remained operational from 5% to 130% of the rated grid voltage.

The grid-forming ESS operated stably and reliably under short-term overload conditions of up to 300%, and effectively suppressed low-frequency oscillations across the 0.2 to 5Hz range. The technology enabled rapid black start capability under load, enabling efficient grid restoration following a complete outage.

This independent verification represents the first overseas on-site validation of the system in full compliance with international standards, including IEC, China National Standards, UK Grid Code and Germany’s VDE standards.

Obtaining TÜV SÜD certification demonstrates that Huawei’s grid-forming ESS technology meets globally recognised benchmarks for energy management and grid stability. The collaboration with SchneiTec signals a step forward in Cambodia’s renewable energy transition. As Cambodia’s renewable energy roadmap progresses, Huawei plans to continue driving innovation, delivering stable, scalable and reliable technology to meet the country’s growing demand for sustainable electricity, and supporting the advancement of its energy infrastructure.

SchneiTec (trading.schneitec.com.kh) was founded in 2015 and has been engaging in projects on power and energy development. It built the first solar farm and the largest solar farm in Cambodia.

Huawei Digital Power (digitalpower.huawei.com) integrates digital and power electronics technologies, develops clean power, and enables energy digitalisation to drive energy change for a greener future. It serves more than three billion people across more than 170 countries and regions.