As practical example the power supply of a telecommunication station (e. g. repeater) is shown in Fig. 1.

In the initial phase the supply is sufficiently maintained by a PV generator, a wind generator, battery and the central energy management. Now as time goes by, the demand for electricity is usually rising due to higher utilisation or added transmission equipment. In a standard hybrid system then the battery would need enlargement as well as PV generator and additional generator. This means downtime for the system and modification to the control. When adding UESP-capable components to an existing UESP system however, they can simply be attached to the power and communication busses and are instantaneously integrated.

Wind Generator Diesel Generator

Fig. 1: Simple UESP System for initial supply to telecom load

As can be seen in Fig. 2 the system is extended by discrete new components, while the existing components are still in operation. For the second battery a converter is required for parallel operation, allowing individual determination of State-of-Charge and State-of — Health as well as the combination of different battery types with complementing properties.