Grid operators have massively increased grid fees in recent years. Energy-intensive companies can use battery storage to significantly reduce their grid costs. This is because from 7,000 hours of use per year, the grid operators consider their customers to be grid-serving and offer them more cost-effective prices in accordance with section 19 of the Electricity Grid Charges Ordinance (StromNEV).
Stay up to date, sign up for our newsletter!
The key figure is calculated by dividing the annual energy purchased by the maximum power purchased by a company. The large-scale dairy Zott in Günzburg, Bavaria, achieves 7,031 hours of use per year with the hybrid storage system installed in May, so it benefits from the price reduction.
Installed outdoors
Ten Scalebloc commercial storage units from Intilion provide a total capacity of 685 kilowatt hours. They cap the dairy's peak loads at the grid connection by 618 kilowatts. The system consists of the battery, the inverter and the energy manager. It is housed outdoors in a climate-controlled enclosure.
See also: Multi-Picea in a cascaded system
A protective rack prevents fires from spreading. In addition, Intilion has equipped its Scaleblocs with a protective bonnet that reduces the sound level to below 35 decibels. In Günzburg, a 1,000-kilowatt genset supports the storage units during long load peaks.
Self-sufficient individual blocks
Since it affects the savings for the entire year if the load peak limit is exceeded once, redundancy was taken into account when planning the system. The Scaleblocs are connected in a modular fashion so that each storage system operates autonomously. If one battery fails, the other nine storage systems continue to run. The control system was also designed with redundancy, and monitoring is carried out via the Intilion cloud. (HS/mfo)
