Connection boundary
Confirm the agreed import and export limits, metering boundary and operator interfaces. A battery rating alone does not establish the permitted power at the connection point.
The battery is only one part of a BESS project.
Eight interfaces to review before commissioning — from the grid connection to operational handover.
For project owners, developers, investors and EPC teams. Use these questions to structure a technical discussion; final requirements depend on the approved project, manufacturer and grid operator.
PCS capability
Review active and reactive capability together, including voltage, temperature and auxiliary-load assumptions. Check the capability at the point of connection, not just at the converter terminals.
EMS / PPC interfaces
Define which controller owns each setpoint, how limits are coordinated, and the response to unavailable communications or state-of-charge limits.
Transformer & cables
Review equipment ratings, thermal assumptions, cable installation conditions, losses and protection interfaces as one electrical system.
Protection & interlocks
Coordinate the protection philosophy, approved settings, authority boundaries and test evidence. This checklist is not a switching procedure or permission to energise.
SCADA & signal quality
Verify signal names, units, scaling, timestamps, quality flags and command feedback against an agreed signal list. The online Mercury simulator uses demonstration values, not plant telemetry.
Safety & auxiliaries
Review cooling, auxiliary supplies, battery monitoring and fire-system interfaces against the project design and manufacturer requirements.
Commissioning evidence
Agree the test boundaries, acceptance criteria, responsibilities, document register and outstanding-action process before handover. Confirm what the operator must witness or approve.
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