Solar installation technician studying a plan

2 people alternate alternative energies alternative energy alternative backlighting backlight shots backlight shot backlight blueprint construction plans construction plan construction project cropped daylight daytime day electricity supply electricity energies energy environment protection environment floor plan green energy helmets helmet job labor labour look at looking back look occupation partial view persons person photovoltaic panel photovoltaic system photovoltaics plannings planning plans plan power generations power generation power supplies power supply power professions profession rear views rear view renewable energy solar collectors solar collector solar energy systems solar energy system solar energy solar installation solar panels solar panel solar power solar system sun collector two people view watches watching watch working works work