Reliable, off-grid power supply for continuous data and voice transmission

Continuous power supply for telecommunications equipment

The EFOY Pro reliably supplies relay stations in hard-to-access locations with power so that telecommunications signals can also be transmitted in remote areas.

More about continuous power supply

Back-up power supply for telecommunications equipment

Base transceiver stations (BTS) are often located in areas with difficult access. They need a reliable back-up power supply in case of power failure so that the availability of public communications systems is guaranteed at all times. A reliable back-up power supply is guaranteed with the EFOY Pro fuel cell.

More about back-up power supply


Complete energy solutions
for telecommunications

Reliable power in remote locations

Relay stations are often located in areas with difficult access because they transmit telecommunications signals to remote places. EFOY Pro fuel cells, in combination with solar modules, wind generators or batteries, ensure autonomous, off-grid power, even in remote areas.

Critical infrastructure, such as digital radio for authorities and organisations with security roles, must continue to be supplied with unlimited power in the event of a mains grid failure. With the EFOY Pro 12000 Duo, an uninterruptible power supply is guaranteed and large banks of batteries can be avoided.

Maintenance-free energy for telecommunications

EFOY Pro fuel cells do not need much space. They can be integrated into existing control cabinets. After installation, they require no maintenance. Only the fuel cartridges have to be replaced every now and then, which can be planned and calculated in advance. The fuel cell can be controlled via a modem, which saves you having to go out to the location.

Off-grid power, whenever and wherever you need it:

  • Extended operating time & autonomy
  • 100 % reliable
  • Easy installation, convenient operation
  • Reduced logistics costs

Uninterruptible Power Supply

Uninterruptible power supply (UPS) systems

Below, we describe what an uninterruptible power supply does and how it works. Please read on to discover more about the definition of an uninterruptible power supply and its key features.

What does an uninterruptible power supply do?

Uninterruptible power supply units provide backup power when the regular power source stops or the voltage drops. In many respects, uninterruptible power supply systems operate unnoticed in the background. Despite operating silently, they provide crucial backup and enable connected systems to operate reliably.

In a large office or server farm installation, the right uninterruptible power supply solution will allow the orderly shutdown of computers and connected devices. Crucially, if power fails, it will protect the assets from damage.

What are the advantages of an uninterruptible power supply?

Apart from providing a short-term electricity supply when struck by sudden power outages, an uninterruptible power supply protects sensitive electronic equipment. It filters and evens out power line surges and voltage spikes. We will expand on this below.

An uninterruptible power supply service should be seamless to the end-user. Nevertheless, these devices are vital to ensure continuity of service in computer and communication networks.

How does an uninterruptible power supply work?

There are three main types or typologies of uninterruptible power supply:

  • Standby, also termed offline UPS.
  • Line interactive.
  • Double conversion, or online.

Next, we provide an overview of the differences between the three.

Standby/Off-line UPS technology

This type of backup power supply is a low-cost solution that reduces the risk of data loss. It combines surge protection with a sealed battery. Typically, mechanical switches or relays change the protected down-circuit equipment to the new supply. The switchover can take up to 25 milliseconds; this short delay might be troublesome in critical applications.


This UPS technology sees the addition of a multi-tap variable-voltage transformer to protect sustained low or over-voltage variations. It is of value where the mains supply is unreliable or subject to frequent fluctuation. However, for extended failures, an auxiliary power supply is also advisable. Batteries alone are not a realistic solution for extended periods without grid power.

On-line or double conversion

This third type of uninterruptible power supply technology is similar, except that the reserve battery is in-circuit. As a result, power switching is unnecessary; there is no switchover delay or drop-out. Essentially, incoming AC mains power is transformed to DC, rectified to a single polarity and used to charge the battery cell(s). The load – or protected device – then receives its power via a rectifier and an inverter to convert it to AC. This double-conversion delivers enhanced protection.[1]

Uninterruptible power supply applications

Applications of UPS systems include:

  • Data storage devices.
  • Computer workstations and servers.
  • On-line management systems.
  • Surveillance systems.
  • Off-grid wind measurements.
  • Lighting of obstructions.
  • Continuous voice broadcasting.
  • Traffic safety and reliable data transmission.
  • Oil and gas production and transmission sectors.
  • Telecommunications.
  • Emergency equipment.
  • Medical facilities and life support units.
  • Industrial processing.

How long does an uninterruptible power supply last?

Also known as a battery backup unit, an emergency power supply starts delivering power when the main supply fails. The length of time for which any given UPS can provide this reserve power depends on its design, specification, reliability and current condition.

The battery charge will service the load when supplying power until the cell discharges. There will be enough time to save files and close down a workstation in low-cost solutions. High-performance, robust continuous power supplies will last longer; please see the examples below.

Points to consider when choosing an uninterruptible power supply

When buying a UPS, we recommend opting for a device with no delay in switching between the primary power source and the uninterruptible power supply battery. Also, the output of the uninterruptible power supply must be sufficient for the connected device(s) to perform correctly.

An uninterruptible power supply cannot run heavy appliances and may require professional installation. Notably, substandard units are likely to be a false economy as they need frequent battery replacement.

EFOY Pro uninterruptible power supply range

While the battery in an uninterruptible power supply will often be on trickle charge and under nil or minimal load, it may – on occasions – have to perform at its peak. Thus, we suggest selecting a quality solution that supplies dependable power in critical applications.

Of the numerous continuous power supply manufacturers and models available today, the EFOY Pro range boasts various performance categories, from 45 Watts for small-scale power systems to a 500W UPS. We invite you to calculate your off-grid or back-up energy requirements here.

Crucially, EFOY Pro fuel cells supply maintenance-free off-grid power for several months without user intervention. Their secret lies in liquid methanol, a fuel with superior energy density for reliable power around the clock. In addition, because the main waste products are water vapour and minimal carbon dioxide, these power cells are safe and environmentally friendly.[2]


After waiting in reserve, an uninterruptible power supply battery may have to respond with maximum current at no notice. Therefore, when choosing the best uninterruptible power supply, it is essential to consider the importance of the application and the effects of power outages.

EFOY Pro solutions are ideal for remote solar modules, diesel generators and any commercial application or infrastructure where the batteries must perform at maximum capability. For uninterruptible power supply prices and details, please click here. Our experts will be delighted to assist.

Further questions and answers about uninterruptible power supply

What is an uninterruptible power supply?

Uninterruptible power supply is a continuous power supply system and can help mitigate some risks by providing an uninterruptible power supply that can step in during a power outage.

What are the advantages of an uninterruptible power supply?

An uninterruptible power supply has the following advantages:

  • Short-term power supply during sudden power outages
  • Protects sensitive electronic equipment
  • Filters overvoltages and voltage spikes from the power grid
How long does an uninterruptible power supply last?

How long a particular UPS unit can provide this backup power depends on its design, specification, reliability and current condition. However, high-performance, rugged continuous power supplies last longer.

We are happy to help you personally!

+49 89 673 592-555

Contact form