A shield member comprises an outer shield portion, an inner shield portion, and a connecting portion. During periods of non-peak load on the electric power grid, the compressor is used to compress atmospheric gases and transfer these gases to a subterranean zone, where the gases are stored. The fuel cell stack also includes a second flow pipe that receives a cathode exhaust gas flow from the first stage and fresh cathode gas flow, where the cathode exhaust gas flow and the fresh cathode gas flow are combined and sent to a second stage of the plurality of stages of the fuel cell stack. The combined first and second layers provide a minimum amount of electrical insulation between the line voltage and the tool housing thereby preventing electrical shock. The invention relates further to the use of albumins for stabilizing chlorin e6 or pharmaceutically acceptable derivatives thereof. The method may also apply a top layer onto the system to form a covered system.