Chynoweth Farm: Delivering One of the UK's First AlphaESS Stax-M50 Installations

The project required a battery solution capable of integrating efficiently with a large rooftop solar array while maintaining flexibility for future operational requirements. The challenge was to: maximise on-site use of solar generation; reduce reliance on imported grid electricity; integrate high levels of DC-coupled solar efficiently; and deliver a scalable solution suited to future expansion. Natural Generation required a modern battery platform that could support these requirements while remaining simple to integrate and monitor.

• Supplying the new AlphaESS Stax-M50 / 144.6kWh system
• Supporting integration of DC-coupled solar into the BESS
• Providing technical guidance around modular system configuration
• Assisting with monitoring and system communication setup

Products

• AlphaESS Stax-M50 / 144.6kWh system

Services

• Technical integration support
• Guidance on DC-coupled solar configuration
• Monitoring and communications support

The completed installation integrates a 100kWp rooftop solar array with the AlphaESS Stax-M50 battery platform. Of the total solar capacity, 85kWp is DC-coupled directly into the 50kW inverter, with the remaining 15kWp connected through an AC string inverter. A key advantage of the M50 platform is its 200% DC-coupling capability, allowing up to 100kWp DC input into the 50kW inverter. This enables significantly higher solar utilisation and improves overall system efficiency within constrained connection environments. To meet the project's required capacity, the system utilised 12 x 12.05kWh battery modules installed onto a single stack/base configuration. The installation also incorporates an additional generation meter and RS485 data cable integration, allowing the system to be monitored centrally through the Alpha Cloud platform.

• While final performance data is still being gathered, the project successfully demonstrates the flexibility and capability of AlphaESS's latest commercial battery platform
• One of the first Stax-M50 installations completed in the UK
• 85kWp of solar DC-coupled directly into the BESS
• Increased potential for on-site solar self-consumption
• Flexible modular architecture designed for future scalability
• Centralised monitoring through Alpha Cloud integration

• This project highlights Immersa's ability to support partners with the rollout of next-generation commercial battery technology. By working alongside Natural Generation and supplying the Stax-M50 platform, Immersa helped deliver a highly flexible solar + storage system that maximises renewable utilisation while remaining scalable for future energy requirements.
• It also showcases the advantages of advanced DC-coupling and modular BESS architecture for commercial and agricultural energy users looking to improve efficiency and long-term operational resilience.