Grid-connected photovoltaic power system Solar energy gathered by photovoltaic solar panels, intended for delivery to a power grid, must be conditioned, or processed for use, by a grid-connected inverter. Fundamentally, an inverter changes the DC input voltage from the PV to AC voltage for the grid. This inverter sits between the solar array and the grid, draws energy from each, and may be a large stand-alone unit or may be a collection of small inverters, each physically attached to individual solar panels. See AC Module. The inverter must monitor grid voltage, waveform, and frequency. One reason for monitoring is if the grid is dead
Localization of a module primes or maximal ideals are trivial. By the very definitions, the localization of the module is tightly linked to the one of the ring via the tensor product This way of thinking about localising is often referred to as extension of scalars. The corresponding "S""R"-module structure is given by formula_6. As a tensor product, the localization satisfies the usual universal property. From the definition, one can see that localization of modules is an exact functor, or in other words (reading this in the tensor product) that "S""R" is a flat module over "R". This fact is foundational for the use