Specify outcomes, not only capacity
State whether the system must shave demand, absorb PV export, provide backup, respond to an aggregator or combine these functions. Define priorities and the minimum state-of-charge reserve for conflicting use cases.
Minimum technical schedule
- continuous and overload power at stated conditions,
- usable energy at beginning and warranted end of life,
- efficiency boundary and auxiliary consumption,
- metering accuracy, sampling and time synchronisation,
- BMS, PCS and EMS interfaces plus local fallback behaviour,
- environmental limits, fire strategy and emergency shutdown,
- warranty throughput, exclusions, service response and spare parts.
Build acceptance around evidence
FAT should verify configuration, interfaces, alarms and documented performance before shipment. SAT should confirm the installed system, protection settings, metering, dispatch, loss-of-communications behaviour and owner handover. Every critical promise needs a test method, tolerance and responsible party.
Preserve owner control
The owner should receive current drawings, settings, account ownership, backup copies and a route to operate safely if the original supplier or cloud service becomes unavailable.