Electrical supply system for low current loads

An electrical supply system for supplying electricity to a plurality of low current loads, said electrical supply system comprising:

• a plurality of low current loads, a fluid medium, compressor means for generating pressure in said fluid medium, flow and return conduits, a plurality of housings associated with said plurality of low current loads and coupled to said compressor means by said flow and return conduits, said housings containing energy conversion means for converting energy of said fluid medium to electricity, each said energy conversion means comprising a rotatable impeller for receiving said fluid medium and for converting energy in said fluid medium into rotational energy, first magnet means coupled to said impeller, second magnet means spaced apart from said first magnet means, said first and said second magnet means being spaced apart along, and rotatable about, a common axis of rotation, said first and said second magnet means forming a magnetic coupling whereby said rotational energy of said impeller is transferred to said second magnet means, and a generator coupled to said second magnet means for converting the rotational energy of said second magnet means into electrical energy for supply to said plurality of low current loads.