Enter the total battery size (kWh) and the cost per unit of power ($/kWh) into the Calculator. The calculator will evaluate the Battery Cost. 

Battery Cost Formula



  • BATC is the Battery Cost ($)
  • BS is the total battery size (kWh)
  • CPE is the cost per unit of power ($/kWh)

To calculate the Battery Cost, multiply the total battery size by the cost per unit of power.

How to Calculate Battery Cost?

The following steps outline how to calculate the Battery Cost.

  • First, determine the total battery size (kWh). 
  • Next, determine the cost per unit of power ($/kWh). 
  • Next, gather the formula from above = BATC = BS * CPE.
  • Finally, calculate the Battery Cost.
  • After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total battery size (kWh) = 87

cost per unit of power ($/kWh) = 38

FAQ Section

What factors can affect the cost per unit of power ($/kWh) for batteries?

The cost per unit of power for batteries can be affected by several factors including the type of battery technology (e.g., lithium-ion, lead-acid), the scale of production, raw material costs, and advancements in battery technology. Market demand and geopolitical factors can also influence the price of raw materials, thereby affecting the overall cost.

How can I reduce the overall battery cost for my project?

To reduce the overall battery cost, consider purchasing batteries in bulk, choosing battery types that offer a good balance between cost and performance for your specific application, and staying informed about new technologies that may offer better performance at a lower cost. Implementing energy-efficient practices can also reduce the total battery size needed, thereby lowering costs.

Why is it important to calculate the battery cost accurately?

Accurately calculating the battery cost is crucial for budgeting and financial planning in projects that involve energy storage. It helps in assessing the feasibility and return on investment of using batteries for a particular application. It also aids in comparing different battery options to find the most cost-effective solution.

Can the cost per unit of power ($/kWh) change over time?

Yes, the cost per unit of power can change over time due to factors such as advancements in battery technology, changes in the cost of raw materials, and shifts in market demand. Improvements in manufacturing processes and economies of scale can also lead to a decrease in costs over time.