US energy company Tesla has presented a plan for the development of a microgrid on Greece’s non-interconnected islands at a meeting yesterday with Greek energy minister Giorgos Stathakis.

The Tesla proposal, a system dubbed Powerpack and based on solar panels and large-capacity batteries, has already been developed on American Samoa, unincorporated US territory including five main islands in the South Pacific Ocean, as a replacement for inefficient diesel-fueled generators consuming 1,400 liters of diesel per day.

Tesla’s system for American Samoa entailed installing solar panels with a 1.4-MW capacity and 60 Tesla Powerpacks for a battery energy storage capacity of 6 MWh.

Regarded as one of the world’s most advanced electricity microgrid solutions, this system ensures electricity supply for as many as three days without sunshine, while its batteries may be fully recharged in seven hours.

According to Tesla, the Powerpack system’s resulting energy cost ranges between 170 and 135 euros per MWh, which is 15 to 30 percent less than the cost of diesel-generator electricity, reaching 200 euros per MWh.

Tesla’s power-network proposal for Greece’s non-interconnected islands, growing into a major attraction for energy sector investors, is the latest following presentations by companies such as Enagas, Socar and EdF.