For sale is diesel gensets which are autonomous power generating systems which combine diesel engines with alternators. Such systems have many uses such as in construction sites and in providing backup electric power to commercial buildings. Due to the high energy density of diesel fuel, these Gensets can operate for extended periods of time. While purchasing diesel Gensets power output, efficiency, maintenance, and component quality from various vendors has to be considered. To some extent, well established brands offer more reliable gensets but the prices are much higher. It is easier to find the best solution for a diesel genset after checking the fuel, maintenance, and purchase costs from different suppliers.