Photovoltaic system in northern climes to 5.61 kWh/m²/day in the sunniest regions. For large systems, the energy gained by using tracking systems can outweigh the added complexity (trackers can increase efficiency by 30% or more). For very large systems, the added maintenance of tracking is a substantial detriment. Tracking is not required for flat panel and low-concentration photovoltaic systems. For high-concentration photovoltaic systems, dual axis tracking is a necessity. Pricing trends affect the balance between adding more stationary solar panels versus having fewer panels that track. When solar panel prices drop, trackers become a less attractive option. Systems designed to deliver alternating
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