Translations:PV module/7/en

There are many different chemistries that are used in PV cells, but there are two main categories of modules that are found on the market. Each type of PV module continues to have different characteristics that can be attractive depending upon the circumstances such as lower price or higher efficiency. PV modules are rated in terms of efficiency at total conversion of light into usable electricity - a measurement that has slowly been increasing for all module types over the years. In simplest terms, a module that is 20% efficient is able to convert 20% of all the light that hits it into usable electricity. Increasing efficiency by 3% - from 17% to 20% - may not sound like much, but it will result in a 17.6% increase in production from the PV module (3% ÷ 17% × 100 = 17.6%).