Rooftop photovoltaic power station Rooftop photovoltaic power station A rooftop photovoltaic power station, or rooftop PV system, is a photovoltaic system that has its electricity-generating solar panels mounted on the rooftop of a residential or commercial building or structure. The various components of such a system include photovoltaic modules, mounting systems, cables, solar inverters and other electrical accessories. Rooftop mounted systems are small compared to ground-mounted photovoltaic power stations with capacities in the megawatt range. Rooftop PV systems on residential buildings typically feature a capacity of about 5 to 20 kilowatts (kW), while those mounted on commercial buildings often reach 100 kilowatts or more.
Serial module turns out that a serial ring "R" is a finite direct sum of homogeneously serial right ideals if and only if "R" is isomorphic to a full "n"x"n" matrix ring over a local serial ring. Such rings are also known as primary decomposable serial rings . Serial module In abstract algebra, a uniserial module "M" is a module over a ring "R", whose submodules are totally ordered by inclusion. This means simply that for any two submodules "N" and "N" of "M", either formula_1 or formula_2. A module is called a serial module if it is a direct sum of