Eaton Brightlayer: EU Battery Passport Witnessing

DPP-SOH.1 -- Battery State of Health

Why this matters: State of health is the core metric of any Digital Product Passport. EU Battery Regulation Art. 14(1) explicitly requires SoH tracking. A declining SoH trend with documented cycle counts demonstrates responsible battery management. Without independent witnessing, this is just a number in your monitoring system.

Real-time SoH readings, cycle counters, and capacity measurements for each UPS battery. Brightlayer tracks these values continuously and exposes them through the REST API.

A timestamped SoH snapshot with the current cycle count and remaining usable capacity in kWh. Each anchor captures the battery's health at a specific point in time. Sequential anchors build a verifiable degradation curve.

from swt3_ai import Witness

witness = Witness(
    endpoint="https://sovereign.tenova.io",
    api_key="axm_live_...",
    tenant_id="YOUR_TENANT"
)

# Read from Brightlayer API
battery = brightlayer.get_battery_status(ups_id="UPS-DC1-A01")

witness.witness_battery_soh(
    soh_percent=battery["soh"],
    cycle_count=battery["cycles"],
    capacity_kwh=battery["remaining_capacity_kwh"]
)

import { Witness } from '@tenova/swt3-ai';

const witness = new Witness({
    endpoint: 'https://sovereign.tenova.io',
    apiKey: 'axm_live_...',
    tenantId: 'YOUR_TENANT'
});

const battery = await brightlayer.getBatteryStatus('UPS-DC1-A01');

await witness.witnessBatterySoh({
    sohPercent: battery.soh,
    cycleCount: battery.cycles,
    capacityKwh: battery.remainingCapacityKwh
});

DPP-CHRG.1 -- Charge Cycle

Why this matters: Charge cycle data reveals how a battery was actually used, not just its current condition. Repeated deep discharges or high-temperature charging accelerate degradation. For warranty claims, insurance, or regulatory review, independently witnessed charge events prove the battery was operated within specifications.

Charge and discharge event notifications from the UPS battery management system, including energy transferred and thermal readings during the event.

The event type, energy throughput in kWh, and peak temperature during the charge or discharge event. These anchors provide granular energy transfer history for the battery's Digital Product Passport.

witness.witness_charge_cycle(
    event_type="charge_complete",
    energy_kwh=12.5,
    peak_temp_c=38.2
)

DPP-DEGRAD.1 -- Degradation Event

Why this matters: When a battery degrades faster than expected, the cause matters. Was it thermal stress from a cooling failure? An overcharge event? Calendar aging? Independently witnessed degradation events create an accountable record that connects the failure mode to environmental conditions, which matters for warranty disputes and regulatory reporting.

Alerts when battery performance drops below configured thresholds. Brightlayer classifies degradation events and measures the impact on overall battery health.

The degradation classification, the SoH delta (how much health was lost), and the ambient temperature at the time of the event. These anchors explain why a battery's health declined between SoH snapshots.

witness.witness_degradation_event(
    degradation_type="thermal_stress",
    soh_delta_percent=2.3,
    ambient_temp_c=32.0
)

DPP-EOL.1 -- End of Life

Why this matters: The EU WEEE Directive and Battery Regulation require documented chain of custody when batteries are decommissioned. Where did the battery go? Who handled it? Was it recycled, repurposed, or disposed of? This procedure creates the final link in the Digital Product Passport chain, proving responsible end-of-life handling.

Battery replacement scheduling and decommission records. When a battery reaches end-of-first-life or fails to meet operational thresholds, Brightlayer flags it for replacement.

The disposition decision (what happens to the battery), the identity of the responsible handler, and the final SoH at the moment of decommission. This anchor closes the battery's lifecycle chain.

witness.witness_end_of_life(
    disposition_type="recycling",
    handler_id="WEEE-FR-2847",
    final_soh_percent=62.0
)