Levelized cost of storage (LCoS).

LCoS helps you identify how cost-effective a battery storage system can be in the long term. That way, you can base your choice of green batteries not only on sustainability, but also on a clear financial rationale, for example by taking into account the impact of peak voltage or grid disturbances.

What is levelized cost of storage?

Levelized cost of storage (LCoS) is a measure that divides the total lifetime cost of a battery storage system by the amount of energy stored and delivered during that period. With this calculation, you can see how much it costs to store one kilowatt hour (kWh), taking into account all expenses such as capital expenditures, maintenance and operational costs. This allows you to transparently compare different options for green batteries and other energy storage systems.

A similar concept on the generation side is Levelized Cost of Energy (LCOE), which reflects the cost per kWh for energy generation, whereby grid factors such as curtailment can also play a role. In addition, there is the Levelized Avoided Cost of Energy (LACE), which indicates what it costs if you do not build the storage system, such as costs for energy procurement on the market or grid reinforcement. If the LCoS is lower than the LACE, investing in storage is financially attractive. Together, these indicators provide a complete picture of the financial feasibility of a sustainable energy system.

LCoS calculate

To calculate the levelized cost of storage, divide all the costs associated with the battery storage system by the total amount of energy the system can store and deliver over its lifetime. Here you consider not only the purchase and installation value, but also recurring maintenance and management expenses. In addition, it is wise to translate future costs and savings into their present value, so that you can make a clean comparison between different storage solutions, especially for projects that also deal with high-consumption connections.

In practice, LCoS gives you a clear insight into the actual costs per kilowatt hour that you store with a battery storage system. This allows you to make an informed choice when investing in green batteries, taking into account not only the purchase price but also the total long-term financial impact.

The importance of levelized cost of storage for BESS

For a battery energy storage system (BESS), the levelized cost of storage (LCoS) is a crucial indicator. The purpose of a BESS is to store energy safely and use it flexibly when needed, for example as part of a virtual power plant. By dividing the total cost per kWh over the entire lifespan, you get a clear picture of the financial performance and profitability of the system.

When you choose a BESS with a low LCoS, you get more value out of every kilowatt hour stored. Consider the broader system value: a BESS relieves the electricity grid, absorbs consumption peaks, and offers flexibility to grid operators. This value perspective is summarized in the VALCOE (Value Adjusted Levelized Cost of Energy), a metric that combines costs and value for a more complete picture of profitability. This allows you to invest sustainably without compromising the financial feasibility of your project.

Factors affecting the LCoS

Determining the levelized cost of storage (LCoS) is related to several elements that make a battery energy system unique. By identifying these factors, you can make a measured choice of green batteries and optimize the efficiency of your energy storage.

• Acquisition cost: the initial investment for the battery storage technology, including equipment and installation, has a direct impact on the final LCoS.
• Service life and number of charge and discharge cycles: a longer service life and more charge cycles result in lower costs per kWh, because the investments are spread over a larger amount of stored energy. This also applies to sustainable alternatives such as a salt battery.
• Maintenance and management: regular maintenance and efficient management reduce operational costs, leading to a more favorable LCoS over the entire life cycle.
• System efficiency: the more efficient the conversion and storage of energy, the fewer losses occur. This is expressed as round-trip efficiency: the percentage of energy you get back compared to what you loaded in. The higher this percentage, the lower the cost per usable kWh.
• Capacity and scale: larger or scalable systems can often spread their costs better, leading to a relatively lower LCoS.
• Avoided system costs (LACE): the value of storage also depends on what the system saves in network costs and energy procurement. If the LCoS is lower than those avoided costs, the investment is financially sound.

Favorable levelized cost of storage at Frax

Ultimately, green batteries are not just about environmental benefits, but also about a solid financial foundation. A competitive LCoS shows that you save costs in the long term and run less risk, because energy costs remain more stable and predictable. By looking at LCoS alongside LACE (the costs you avoid by investing in storage) and VALCOE (costs and value combined), you are not only investing in a battery but also in a future-proof position in the energy system. This gives you a sustainable energy solution that benefits both your budget and your ecological footprint, and also responds to new standards such as the BENG energy performance standard.

Wondering how to optimize your storage costs? Then discover how Frax's solutions make a favorable LCoS possible for you. With high-quality and user-friendly battery storage systems, you can invest smarter in green energy. Contact us today to take your sustainable project to the next level.

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