Factory Case Study

Biomass Plant, Ontario, Canada


Our client in Northern Ontario operates a biomass plant. Such plants do not operate at a flat output, but they do not ramp up fast enough to keep up with load growth in the morning or ramp down fast enough at night to follow the load drop. The client has been using diesel generators for this function as generators follow load variations quickly. But the fuel costs and the emissions associated does not make it the ideal choice.


In this factory case study, battery energy storage is well suited to provide the instantaneous load response required during such operations. Below, the metered load data for the plant during a 24- hour cold day in January has been broken into manual count of kWh charge & discharge for 15-minute intervals to design the BESS:

Period Number15 min intervalkWhChargeDischarge
225-46+2050 2050
462-74+445 445
695-96+100 100
Total  42102595

Cost Saving Benefits

With a generator cost of US$80,000, requiring annual fuel costs of US$361,192, and annual maintenance costs at US$94,718, the annual cost to run a generator is US$455,910 per year.

With a 500kW/2228kWh BESS to replace the 500 kW diesel generator, it completely eliminates the recurring fuel and maintenance costs and has a payback period of just under 4 years.

Generator CostFuel CostMaintenance Cost
With Diesel Generator

BESS CostPayback
US$1,782,400~3.7 years
With Battery Energy Storage

Work with TROES

Power your next project using energy storage. Our Sales and Engineering team will work with you to find out if energy storage makes financial and economical sense.