Avoid excessive electricity demand charges



Grid operators in many countries are charging a ‘demand rate’ in addition to the standard energy rate. For facilities with a strongly variable consumption, the total demand charge may even largely exceed the total energy charge, making them the main driver of the electricity bill.

Solutions for excessive demand charge are usually not far away as they can be mitigated by the installation of local generation. Solar PV is often the technology of choice but due to its variability, its production may not always match the peak demand and moreover peak demand during the night cannot be reduced. That is when storage enters the story. By buffering energy and releasing it at times of peak demand, the facilities peak charges can be reliably reduced.

For facilities with a major electricity demand for supplying thermal loads such as air conditioning or heat pumps in buildings, better solutions may exist. As Thermal Energy Storage is more cost-efficient than Battery Energy Storage, it is a valuable complement in shaving the peak demand. Therefore, 3E now offers a full optimization for sizing and controlling both storage types together.

This service leverages 3E’s knowhow in modelling energy components & systems (PV, storage, HVAC, loads) together with in-house optimization techniques commonly applied for HVAC systems. It expands 3E’s storage consultancy expertise further to smaller system sizes. This integration of services also allows for evaluating a broader scope of use cases such as increasing self-consumption and reducing prosumer tariffs.