Battery Round-Trip Loss Cost Calculator — Price the Energy Lost in Storage
See how much energy a storage system loses between charging and discharging, and estimate the electricity cost associated with that loss.
Round-trip loss inputs
Understanding round-trip efficiency
Round-trip efficiency expresses how much energy comes back out compared with the energy put into storage under a defined operating test or scenario.
Energy lost
Loss is calculated as the difference between the energy sent into the storage cycle and the energy recovered after the entered efficiency.
Why the loss compounds with repeated use
A small loss per cycle becomes much more significant when the storage system processes large annual energy volumes.
Comparing systems
The alternative-efficiency input shows how a higher-efficiency system would change annual energy loss under identical throughput.
Frequently asked questions
Does 92% efficiency mean 8% loss?
Under this simplified accounting basis, yes.
Does loss equal wasted heat only?
No. It is an energy-accounting difference and can include multiple conversion and storage losses.