How many PCS units per container?

Typically one 1.25–2.5 MW PCS per container. For projects above 20 MW, skids with multiple modules and a shared transformer are used.

Does the PCS limit the system's lifetime?

Design lifetime of a PCS is 15–20 years, with fan and capacitor replacement on a 7–10 year cycle. We account for this in the service agreement.

Is grid-forming more expensive?

The difference is typically 3–7% of converter price, mainly from licensing and certification testing.

Technology · PCS

PCS — power conversion systems in energy storage

Short answer

A standard PCS for a 20ft container has a power rating of 1.25–2.5 MW and an efficiency of 98.3–98.8%. Grid-forming mode allows the unit to operate as a voltage source and form an island without grid support.

98.3–98.8% efficiency at the converter level
Grid-forming — islanded operation and synthetic inertia support
Compliant with NC RfG and DSO requirements

Request a quote — pricing in 48 h Sizing guide

Topologies and power sizing

The PCS is sized to the block's power rating, not its capacity. A 5 MWh container in a 2-hour configuration needs 2.5 MW of converter power; in a 4-hour configuration, 1.25 MW is sufficient.

Efficiency and round-trip efficiency

System-level AC-AC efficiency is the product of PCS efficiency, transformer efficiency, and parasitic losses. A realistic figure for a modern liquid-cooled system is 86–89% at 0.5C.

Grid-forming and grid code requirements

Grid-following operation as standard for grid-connected installations
Grid-forming for islanded operation, data centers, and stability support
LVRT/HVRT, Q(U) and P(f) regulation compliant with NC RfG
Interface to the EMS and to the operator's SCADA system

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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