A fitting is inserted into an opening in a wall. Incident solar radiation for various placements of the photovoltaic arrays accommodating different azimuths and tilts is calculated. The ELI utility assigns the iterator thread to a dedicated processor in a multi-processor system. A looped portion of the strand is diverted so as to protrude out of the entrance to the longitudinal socket. Disclosed is a manufacturing method of a proposed zinc can and a battery along with engineering clues for material evaluation and processing with regard to metallographic aspect.