tender for solar light work in belthara tehsil premises - echnical specificationsa off-grid solar rooftop photo voltaic (spv) power plant consists of spv array, module mounting structure, power conditioning unit (pcu)/inverter consisting of maximum power point tracker (mppt), inverter, controls & protections, ac/dc cables, junction boxes, distribution boxes and switches. pv array is mounted on a suitable structure. grid tied spv system will be with battery and bi-directional should be designed with necessary features. components and parts used in the spv power plants including the pv modules, metallic structures, cables, junction box, switches, pcus, battery etc., should conform to the bis or iec or international specifications, wherever such specifications are available and applicable. solar pv rooftop system shall consist of following major equipment/components.