Does BESS replace the UPS?

In Tier III and higher setups, BESS complements the UPS by extending hold-up time. Full replacement requires compliance with the facility's adopted reliability class.

What minimum reserve SOC do you assume?

Typically 50% of capacity is locked as a reserve, with the EMS managing the remainder for market purposes.

Does DSR participation reduce reliability?

No, as long as the reserve is hard-locked in the EMS. DSR activations use only the capacity above the reserve threshold.

Application · data center

Energy storage for a data center — guaranteed power supply and arbitrage

Short answer

For a data center with 10 MW of IT load, a 10 MW / 20 MWh storage system provides 2 hours of runtime at full load while also participating in DSR. This is a reserve measured in hours, not in minutes as with a classic UPS.

Reserve measured in hours instead of minutes
Fewer genset starts and lower fuel consumption
DSR and arbitrage revenue from an asset that would exist anyway

Request a quote — pricing in 48 h Sizing guide

The problem: a reserve that earns nothing

A classic UPS-plus-genset setup is a cost with no revenue. A BESS functions as a reserve with a longer hold-up time while simultaneously generating market revenue.

How it works

The PCS in grid-forming mode takes over supply of the islanded section in under 20 ms. The EMS maintains a minimum reserve SOC (typically 50%), trading the surplus capacity in the market.

Sizing parameters

IT load → recommended storage
IT load	BESS power	Capacity	Hold-up time
2 MW	2 MW	4 MWh	2 h
5 MW	5 MW	10 MWh	2 h
10 MW	10 MW	20 MWh	2 h
25 MW	25 MW	50 MWh	2 h

FAQ

Request a quote — pricing in 48 h

Send us the project scale in MWh, the site location and the available grid capacity. We reply with a configuration, CAPEX range and delivery schedule.

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