Instead of using a small number of large stacks, Hyosis distributes production across many smaller stacks mounted on tray-like modules. Each tray is designed to be removed and installed without disturbing the rest of the system.

This creates a more granular architecture: individual trays can be isolated, inspected or replaced while neighbouring trays remain in operation, allowing the system to run at partial capacity instead of going fully offline.

By default, the architecture assumes that individual trays will eventually need attention. Rather than treating failure as an exception, the system is designed so that:

• Multiple trays share the load under normal operation
• Capacity can be rebalanced if one tray is taken offline
• Planned interventions can be done without a full shutdown

Over time, this approach is intended to support higher effective uptime for the overall plant, especially in remote or lightly staffed locations.

The balance-of-plant layout is being developed with serviceability as a first-class constraint. That includes:

• Stack manifolds arranged for safe isolation and access
• Clear separation between high- and low-voltage areas
• Accessible valves, filters and instrumentation
• Guided service procedures for on-site technicians

The aim is to minimise the need for specialised hydrogen service visits wherever possible, while still meeting rigorous safety requirements.