BESS Qualification Overview | NVIDIA DSX Documentation

Step 1: Product Requirements Document (PRD) Review

Partner must respond to each PRD requirement line with:

Compliant / Non-compliant / Exception (C, D, or E)
For non-compliance: current behavior, roadmap, workaround, and risk
For exceptions: explain the technical substitute and results
Reference to specific evidence: test ID, plot, model, or certificate

Reference document: “BESS Requirements Document”

Table 1. BESS Qualification PRD Response Example

Requirement ID	Item	Description	Partner Response
CTRL-REQ-01	Grid-Adaptive	PCS shall sustain stable island mode operation, including voltage and frequency control independent of grid synchronization signals such as a phase-locked loop (PLL).	Compliant. Evidence: Test 9, EMT case E-4
PERF-REQ-02	Ramp limit	Demonstrate active ramp-rate smoothing to buffer the source from sudden AI load swings. The system must maintain constant stability between the source and the load, ensuring no oscillations or control ‘hunting’ occur during rapid power transitions or under normal load conditions.	Compliant. Evidence: Test 4, 5 and 11

Note

Since the qualification boundary is at BESS AC terminals, “POI ramp” requirements are verified using an approved POI proxy: a commanded P profile equivalent to the required POI shaping, and/or EMT verification using partner-provided models.

Step 2: Materials, Safety, and Compliance Disclosure

Partner must complete disclosure tables for:

2.1 Battery and PCS Materials and Safety

Cell chemistry, enclosure type, fire detection/suppression approach
Cooling method (air/liquid), coolant type (if applicable)
Dielectrics/insulation class for major components
Hazardous materials declaration (electrolyte class, refrigerants)

2.2 Standards and Regulatory Compliance Evidence

Provide certificates or reports for:

UL 9540 / UL 9540A (or equivalent) status
NFPA 855 alignment statement
IEEE 2800 functional alignment statement (even if not certified)
CE/UKCA (where applicable)
RoHS/REACH
EMC compliance evidence relevant to PCS

Step 3: Core Requirements Availability

A subset of requirements is designated Core Requirements representing minimum essential capabilities to pass qualification. Partners must complete the “Core Requirements Checklist” provided in Appendix B.

Table 2. Core Requirements (Minimum)

No.	Core Requirement	Requirement ID	Minimum Requirement
1	Autonomous Island Operation Capability	CTRL-CORE-01	PCS shall stably transition to and sustain island mode operation. Loss of external voltage reference shall not cause voltage and frequency regulation to exceed specified performance limits. Voltage source behavior under current limit. Defined virtual impedance or equivalent mechanism.
2	AI buffering dynamic response	PERF-CORE-01	Demonstrate active ramp-rate smoothing to buffer the source from sudden AI load swings. The system must maintain constant stability between the source and the load, ensuring no oscillations or control ‘hunting’ occur during rapid power transitions or under normal load conditions.
3	Current limit behavior	PERF-CORE-02	Current limiting shall be predictable: no unstable oscillation, no uncontrolled voltage collapse in modeled grid conditions.
4	LVRT/HVRT	GRID-CORE-01	Support IEEE 2800 ride-through behavior as baseline; utility curves may supersede.
5	Reactive power support	GRID-CORE-02	Provide voltage support via Q within PCS current limits; document Q priority rules.
6	Seamless grid/island transition	MODE-CORE-01	Demonstrate controlled transitions without loss of synchronism or unstable control mode hunting. Transition performance shall be quantified using voltage deviation per ANSI C84.1 and dynamic voltage/frequency ride-through per IEEE 2800.
7	Black start	MODE-CORE-02	Demonstrate black-start energization of a dead bus and stable V/f regulation.
8	Telemetry and controls	TELE-CORE-01	Real-time reporting of V, I, P, Q, f, SOC, alarms, and limit states. Must support 3 concurrent Modbus TCP connections with all points being polled at 1 second frequency. SOC values must be included in all telemetry reporting.
9	Control transparency artifacts	MODEL-CORE-01	Provide EMT model + validation against impedance/admittance scan (dq impedance vs frequency) + Nyquist/passivity artifacts. Comply with NERC Reliability Guidelines.
10	DR dispatch capability	OPS-CORE-01	Follow dispatch setpoints with defined response time, ramp limits, and SOC reserve logic.

Step 4: Qualification Tests

This section defines test procedures and pass/fail criteria. All tests are performed at the BESS AC terminals unless explicitly stated as model-only.

Table 3. Instrumentation Requirements (applies to all tests)

Minimum measurement accuracy (applies to all tests):

Parameter	Minimum Accuracy	Sampling Rate
Voltage	±0.2% of reading	≥ 5 kHz (EMT) / ≥ 10 Hz (operational)
Current	±0.2%	≥ 5 kHz (EMT) / ≥ 10 Hz (operational)
Power (P/Q)	±0.5%	≥ 10 Hz
Frequency	±0.01 Hz	≥ 10 Hz
Time Sync	±1 ms between channels	N/A
P/Q Dynamic (ramp, oscillations and transients)	±0.1% of rated P at test frequency	≥ 120 Hz
Bandwidth	0.1–59.9 Hz	—

All events must include pre-trigger (≥ 5 s) and post-trigger (≥ 20 s) unless otherwise specified.