IATA opted for Appropriate Energy systems ranging from simple
diesel-battery hybrids to a wind-solar-diesel hybrid because of these
system's potential savings on fuel and Appropriate Energy's
experience with remote situations and ability to meet strict IATA
requirements. Because the systems were required to provide 24 hours
of sustainable 220V AC quality sine wave power, each site has at least
one level of redundancy. One of the four diesel-battery hybrids was
connected to the grid while the others were stand-alone systems