Power supply for GNSS receivers

Monitoring of landslide-prone regions

Norwegian Water Resources and Energy Directorate (NVE), Norway

Fuel Cell: EFOY Pro 2400

NVE Schnee Helikopter Erdrutsch EfoyNVE Berge Efoy Pro ErdrutschNVE Efoy Pro Winter Schnee Erdrutsch

What type of application does your case relate to?

The Norwegian Water Resources and Energy Directorate (NVE) has several high risk objects in Norway which are monitored against the risk of a landslide. One of them is Gámanjunni in the municipality of Kåfjord (Troms, Northern Norway), which we have monitored since 2015.

What problems or challenges needed to be addressed with your application?

We needed a solution that could provide us stable 24 V at all time, 24/7, in a hard and cold environment. We are monitoring with GNSS receivers. We used fuel cells right from the start, and since 2015, the number of fuel cells in use has increased. The power demand is between 20-40 watt when we only need power for the GNSS receiver, 1 switch, and two 2.4/5 GHz radios, to approx. 60-80 watt when we run a camera instead of the GNSS receiver.

Why did you choose the EFOY Pro?

We needed a power solution that works in winter, when we have neither sunlight nor wind to generate power. Fuel cells are ideal for this purpose.

The solution:
EFOY Pro 2400 Duo

Project Requirements:

  • Voltage: 24 V
  • Power demand: 20-80 W
  • Fuel Cell: EFOY Pro 2400 Duo
  • Solution: Weatherproof cases
  • Back-up Autonomy: up to 1 year

“Fuel cells are ideal for this purpose”

We needed a power solution that works in winter, when we have neither sunlight nor wind to generate power. Fuel cells are ideal for this purpose.

Per Steinar Lyngstad, Senior engineer

How long is your shortest/longest autonomy time with the EFOY Pro?

It depends on what kind of instruments are powered by the fuel cell. If we run a camera, which has a heater that demands approx. 51 watt, then we change the cartridges approx. every 2-3 months. This case occurs only in winter. At some places we only use a GNSS receiver and we could run the application for about one year with two M28 fuel cartridges, the whole winter included.

How many EFOYs do you use and how is the EFOY Pro integrated in your installation? Do you combine other alternative power sources?

The EFOY Pro is integrated in an isolated box with two batteries, two fuel cartridges and communication hardware. We have approx. 9 fuel cells. Every box has also solar panels and some have also wind power.

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