Turbine, despite its apparent simplicity, is not well suited for relatively low-power generators because of its high cost. Of course, the classification is far from complete: we have dropped the chemical and other sources of electricity. Nevertheless, the current practice of device ups she reflects. Below, describing the independent sources, we will focus only on the generators, built on the basis of various internal combustion engines, since they received the greatest distribution. For brevity, we call them power generators or mini-power plants and independent power sources, based on work which is the ability to store electricity – batteries, or 'battery'.

Mini-power Enlarged mini-power station is a unit consisting of an internal combustion engine, the shaft is in motion (rotation) of the moving coil generator systems provide power to the motor control and transform its energy into electricity with standardized consumer parameters: the three phases (380) or single phase (220 V, 50 Hz). Mini-power plants can be based on internal combustion engines, working on various types of hydrocarbon fuels. Most prevalent at this time were diesel and petrol units, good prospects and gas devices. Today, they're pretty firmly entrenched in the segment of fixed mini-power high power. Except for the engine type, these units do not have fundamental technical differences – hydrocarbon fuel is combusted in a cylinder rotating crankshaft, which in turn spins the shaft generator. Last crankshaft converts the rotary motion into electricity. However, such a short description obviously not enough to choose the most appropriate device. Because let's talk about the selection criteria.