The 35kV photovoltaic booster station is a box-type power substation that steps up three-phase AC electricity from solar inverters. Our modular pad mounted (metal-clad) substations convert low-voltage AC power generated by the PV inverter into medium-voltage AC power and feed it into the power grid. A Brunstock step up. This article explains the differences between PV step-up box substations and conventional distribution substations, along with industry trends—helping global solar developers, EPC contractors, and power equipment buyers make informed decisions. Core Equipment Overview A PV step-up box. ZTELEC Electric Technology presents its cutting-edge Step-up Distribution Box Type Transformer Substation, designed to optimize renewable energy transmission while minimizing carbon footprint. Our substation combines modular design with high-performance components, tailored for distributed wind and. Equipment for converting, metering and connecting solar thermal power plants. Solar panels absorb sunlight and convert it.