Battery Energy Storage System

Parag Diwan
10 min readMay 1, 2019

A Battery Energy Storage System (BESS) is a technology developed for storing electric charge by using specially developed batteries. The underlying idea being that such stored energy can be utilized at a later time. Enormous amount of research has led to battery advances that has shaped the concept of Battery Energy Storage System into a commercial reality.

Source: Power Planet Battery Energy Storage System

Battery Energy Storage Systems (BESSs) are a sub-set of Energy Storage Systems (ESSs). Energy Storage System is a general term for the ability of a system to store energy using thermal, electro-mechanical or electro-chemical solutions. A BESS typically utilizes an electro-chemical solution.

Essentially, all Energy Storage Systems capture energy and store it for use at a later time or date. Examples of these systems include pumped hydro, compressed air storage, mechanical flywheels, and now BESSs. These systems complement intermittent sources of energy such as wind, tidal and solar power in an attempt to balance energy production and consumption.

Energy storage results in a reduction in peak electrical system demand and ESS owners are often compensated through regional grid market programs. Regulators also offer incentives (and in some cases mandates) to encourage participation.

Why BESS over other storage technologies

BESS has advantage over other Storage technologies as it has small footprint and no restrictions on on geographical locations that it could be located in. Other Storage technologies like Pumped hydro storage (PHS) and Compressed air energy storage (CAES) are only suitable for limited number of locations, considering water and siting-related restrictions and transmission constraints. Energy and power densities of some technologies are as follows:

Accordingly BESS utilizing Lithium Ion technology offer high energy and power densities that are suitable for utilizing at distribution transformer level. The available space at…

Parag Diwan

A noted academic leader, is at the vanguard of research and curriculum design across disciplines to usher in Education.40. Evangelist & Advisor to universities