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01. Engineered for C&I Performance: Exploring the Evolving C&I Landscape

For UK installers working in the commercial and industrial (C&I) sector, expectations are rising.

Clients are no longer asking simply for “solar plus storage.” They’re asking for peak load management, enhanced savings, improved ROI modelling, backup resilience, and systems that can scale as energy demand grows.

Through our extensive partnership network of distributors and installers throughout the UK, AlphaESS’s C&I portfolio is being deployed into real-world agricultural, estate and industrial environments where performance matters.

At the centre of this deployment are three core systems: the G3-H30/50, Stax-M30/50, and the STORION-TB125.

G3-H30/50: Hybrid Architecture for Smarter Commercial Design

The AlphaESS G3-H30/50 has become a go-to solution for medium-scale commercial applications.

For installers, its strength lies in its three-phase hybrid design and DC-coupling capability. This enables:

  • Direct integration with high-yield PV arrays
  • Reduced conversion losses 
  • Higher on-site solar utilisation 
  • Improved system efficiency

In practical terms, that means more usable generation retained behind the meter — and stronger financial outcomes for clients.

Key Specifications

Power (kW)Capacity (kWh)Off-Grid / Back Up CapabilitySolar DC-CouplingSafety & ReliabilityParallel Capability
G3-H30
Power (kW): 30
Capacity (kWh): 72.3 or 144.6
Off-Grid / Back Up Capability: Yes - built in
Solar DC-Coupling: Max 75 kWp DC
Safety & Reliability: IP55 Cabinet, Built in Fire Suppression System
Parallel Capability: 10 on grid, 4 off-grid
G3-H50
Power (kW): 50
Capacity (kWh): 120.5 or 241
Off-Grid / Back Up Capability: Yes - built in
Solar DC-Coupling:

Max 60 kWp DC

Safety & Reliability: IP55 Cabinet, Built in Fire Suppression System
Parallel Capability: 10 on grid, 4 off-grid
The system’s modularity also allows installers to size appropriately today, with room to expand tomorrow, a critical advantage for farms and SMEs with evolving load profiles.

Designed Around Site Performance

Throughout the UK and across a wide range of sectors, the G3-H30/50 and Stax M30/50 has been deployed in configurations where solar is DC-coupled directly into the battery architecture.

For installers, this isn’t just a technical feature — it’s a design advantage.

It allows:

  • Greater control of energy flows
  • Improved grid-acceptance through reduced AC connections to the grid
  • Decreased project costs, improving investor paybacks and ROI’s
  • Single point of monitoring for solar PV and BESS via the Alpha Cloud free platform
  • Optimised self-consumption
  • Reduced reliance on export tariffs
  • Improved peak shaving capability

Resilience is non-negotiable for many clients, especially critical industries, including agriculture and manufacturing. Backup functionality and load management aren’t “add-ons” — they’re central to operational continuity.

The hybrid architecture gives installers the flexibility to design systems around the site, rather than retrofitting storage into an existing framework.

Stax-M30/50: Modular Capacity for Leading Flexibility and Easy Installation [LC1]

For commercial sites needing flexible, scalable storage, the AlphaESS STAX-M30 and M50 offer a modular solution designed to simplify installation and support future expansion.

The range is engineered for:

  • Flexible, modular capacity
  • Easier installation
  • Improved DC-coupling on the M50
  • A cleaner, more modern design

For installers, it provides a practical alternative to larger fully integrated systems.

Key Specifications

Power (kW)Capacity (kWh)Off-Grid / Back Up CapabilitySolar DC-CouplingSafety & ReliabilityParallel Capability
M30
Power (kW): 30
Capacity (kWh):

60.25 – 216.9

Off-Grid / Back Up Capability: Yes - built in
Solar DC-Coupling:

Max 60 kWp DC

Safety & Reliability:

IP66 Modules Built in Fire Suppression System

Parallel Capability:

6 on grid, 2 off-grid

M50
Power (kW): 50
Capacity (kWh):

108.45 – 216.9

Off-Grid / Back Up Capability: Yes - built in
Solar DC-Coupling: Max 100 kWp DC
Safety & Reliability: IP66 Modules, Built in Fire Suppression System
Parallel Capability: 6 on grid, 2 off-grid

STORION-TB125: Scaling for Higher-Demand Sites

For larger commercial and industrial loads, the AlphaESS STORION-TB125 expands Alpha’s capability into higher-demand environments.

With 125 kW of power output and scalable capacity beyond 261 kWh, the TB125 is engineered for:

  • Advanced peak demand management
  • Load shifting across tariff windows
  • Energy arbitrage strategies
  • Industrial-grade backup support

For installers targeting manufacturing facilities or energy-intensive sites, this system provides the power density and scalability required without overcomplicating deployment.

Key Specifications

Power (kW)Capacity (kWh)Off-Grid / Back Up CapabilitySolar DC-CouplingSafety & ReliabilityParallel Capability
TB125
Power (kW):

125

Capacity (kWh):

261

Off-Grid / Back Up Capability:

Yes – optional extra

Solar DC-Coupling:

Max 250 kWp DC

Safety & Reliability:

IP55 Cabinet Built in Fire Suppression System

Parallel Capability:

25 on grid, 5 off-grid

Built for the Next Phase of C&I GROWTH

As grid constraints tighten and commercial customers seek greater control over energy exposure, scalable hybrid storage is becoming foundational infrastructure.

With the G3-H30/50 and Stax-M30/50 offering flexible hybrid deployment and the STORION-TB125 supporting higher-demand environments, AlphaESS is equipping installers with a C&I portfolio built for real-world performance.

Delivered in partnership with our distributors and installers, these systems are helping sectors and businesses to move beyond basic storage integration — and towards engineered energy resilience.

Looking to deliver C&I battery storage projects with confidence? AlphaESS UK and our network can guide you to making the right decisions from conception through to commissioning.

To explore some of our network relationships, visit our distributor and installer partners Q&A Series here.

Alternatively, you can search our Installer database and connect with installers by visiting our Find an Installer Portal