old system. solar panels more than 10 years old. photovoltaic system on the roof of a family home next to sloping skylights. the

solar energy panel power electricity photovoltaic sun alternative environment roof sky technology renewable blue sunlight ecology panels green cell clean house environmental collector electrical sustainable closeup electric nature nobody rooftop home red building innovative residential ecological resources photovoltaics old system more than years old system family next sloping skylights were mounted around window modules