Energy storage systems for charging stations and pick shaving

Battery energy storage systems for
charging stations
can help reduce demand costs through peak shaving, storing electricity during low demand and releasing it when electric vehicle charging stations are in use.

Let’s see how.

Storage systems, what and what are they?

Storage systems are batteries integrated with the photovoltaic system that make it possible to optimize the production of consumption (Repubblica.it) by actually storing electricity and making it available at the appropriate time.

This is a very useful system where there are renewable energy sources such as a photovoltaic system, which can also be used to recharge condominium columns for electric vehicles and beyond.

Storage systems can be electrical such as supercapacitors, chemical (with hydrogen), electrochemical (with batteries) and mechanical, consisting of flywheels, reservoirs or compressed air.

Peak shaving, what is it?

With the “peak shaving” literally peak filing, “a consumer reduces energy consumption (load reduction) quickly and for a short period of time to avoid peak consumption. This can be done by temporarily reducing production, activating an on-site power generation system, or relying on a battery.” (next- kraftwerke.com)

“Peak shaving with batteries not only saves money; it also improves power reliability. A peak shaving system provides battery backup in the event of a power outage. Depending on your home or building’s battery capacity, you’ll be able to keep the lights on for several hours or more.” (Crownbattery.com)

This can dramatically reduce the overall cost of charging electric vehicles, especially when using DC (direct current) fast charging stations.

This is what the study “Sizing of stationary energy storage systems for electric vehicle charging plazas “* showed.

The study showed that an increasing number of electric vehicles and their fast-charging stations could cause problems for power grids.

Critical issues could be prevented precisely because of energy storage systems because they rely on power demand leveling of the charging station that reduces the required connection power, smoothing out variations in the power it draws from the grid.

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Balancing energy supply and demand

Here is what the Energy Efficiency Unit Department ofENEA (National Agency for New Technologies, Energy and Sustainable Economic Development) writes about peak shaving:

“Peak shaving” is an energy demand management strategy that aims to reduce or “shave off” peak energy consumption during peak periods. During peak periods, energy demand reaches high levels, which can put pressure on the power grid.

The practice of peak shaving is to reduce power demand during these critical periods in order to avoid overloads or the need to activate additional power generation resources.

There are several techniques used for peak shaving. One of these is to use energy storage systems, such as batteries, to store excess energy during periods of low demand and release it during peak periods. This can help reduce the impact of peak demand on the power grid.

Other peak shaving strategies include managing loads, implementing incentive programs to shift energy consumption to off-peak times, adopting energy efficient technologies, and using alternative and renewable energy sources.”

Ultimately, the main purpose of peak shaving or peak energy leveling is to ensure an efficient balance between energy demand and availability, minimizing extra expenses and limiting the influence on the environment related to energy production during times of high demand.

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