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Modular fuel cell energy system – OOLTY Cabinet

The OOLTY Cabinet from H2 Power n Heat GmbH is a highly flexible, modular energy system designed to provide a reliable power supply and emergency power.

It combines state-of-the-art water-cooled PEM fuel cell technology with integrated battery storage in a compact design that is scalable up to 100 kW. The system is suitable for both indoor and outdoor installation.

The OOLTY cabinet not only generates electrical energy, but also enables efficient use of waste heat, achieving an overall efficiency of > 90%.

Modular fuel cell system

Each cabinet module contains up to 5 OOLTY power boxes (5 kW fuel cell systems), which are water-cooled for high efficiency and long service life. Up to 5 modules can be combined in one cabinet for outputs of up to 25 kW in continuous operation.
The modules are intelligently networked and automatically adapt to the current load.
Up to 4 cabinets can be combined for continuous operation with outputs of up to 100 kW.

Integrated buffer battery

A 4.8 kW battery is integrated per fuel cell system.
This battery stabilizes the system during peak loads, enables a quick start, and increases supply reliability.

Flexible power outputs

Standard 48 VDC output for DC applications or battery storage.
Optionally, the direct current can be converted via inverter-based systems to
- 230 VAC (single-phase) or
- 400 VAC (three-phase).

Efficient heat utilization

The OOLTY cabinet not only uses the electrical energy from the fuel cell, but also provides valuable useful heat.
Since the water-cooled 5 kW fuel cell systems release their waste heat in a closed cooling circuit, this heat can be efficiently extracted and used externally.

Increased overall efficiency

By utilizing the waste heat from the fuel cells, the OOLTY cabinet achieves a significantly higher overall energy efficiency (> 90%).
This reduces energy costs and increases the ecological benefits of the system, especially in areas where electricity and heat are needed simultaneously.

Integrated water heating circuit

Each fuel cell system is water-cooled, which allows the heat generated to be dissipated safely and in a controlled manner.
An optional heat exchanger unit allows the waste heat to be used for specific purposes or fed into existing heating systems.

Flexible installation

Suitable for indoor and outdoor use.
Weatherproof and service-friendly housing design.
Ideal for container solutions, technical rooms, or outdoor enclosures.

Areas of application

The OOLTY cabinet was specially developed for:

Off-grid power supply
Emergency power applications for critical infrastructures
Backup systems in commerce, industry, and energy supply
Decentralized, emission-free power generation

The heat generated is ideal for:

Building heating
Hot water supply
Frost protection for outdoor technical equipment

Modular fuel cell energy system – OOLTY cabinet

Modular fuel cell energy system – OOLTY Cabinet

Key features

Areas of application

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