Although the original ALIS paper [Steen, 1989] stated that some stations would have to generate their own power, all GLIPs deployed so far have been located close to commercial power lines.
In Sweden, a typical electricity account gives access to A at V AC which provides much more than sufficient electrical power (about 11 kW) for heating and powering the GLIP. Thus only the energy cost has been of concern.
The electrical installation in the GLIP has more fuses than a typical household installation in order to minimise the loss of function caused by blown fuses.
The incoming power lines pass through the mains switch, energy meter and surge protection circuits before entering the main fuse box. There is a relay box for remote-controlling the heaters, defrosters, etc. (see Section A.2) from the housekeeping unit (Section A.4). Three thermostats are used for fail-safe temperature control if the housekeeping unit should fail to control the temperature properly. There are a number of outlets (230 V/10 A) for equipment and a three-phase outlet ( A V). Figure A.5 shows some of this equipment.
The Power Distribution Unit (PDU) (Figure A.6) distributes
There is also a 12 V 75 Ah lead-acid battery with an automatic charger powering the housekeeping unit and other devices requiring an uninterrupted 12 V DC supply, such as the GPS receiver, etc.
A GLIP consumes up to 10000 kWh annually. Most of this energy is used by the heating and defrosting equipment. Some sites have had a rather large number of power failures, and it has been suggested that an Uninterrupted Power Supply (UPS) should be installed at each station to prevent the loss of measurements due to transients and short-term power outages.
If GLIPs are to be mounted in remote areas with no commercial power, they might have to generate their electrical power on site and therefore might require other solutions for heating and defrosting the dome.