A new green, zero-carbon power supply solution for telecom base stations integrates photovoltaic (PV) and hydrogen. The PV system serves as the primary power generation source, while the hydrogen production and storage fuel cell system acts as the energy storage source., ancillary services, demand response). The fuel cells are able to provide power for the cell tower during emergency conditions. This study. . Present backup power supply systems make use of lead storage batteries, but achieving a storage capacity that can provide long-term backup requires excessively large and heavy batteries that can make installation difficult. This solution addresses the. . Troowin has independently designed, developed and manufactured an air-cooled fuel cell system with power within 0.