Investigation and fleet-wide checks

Confirmed cause findings should be published after BESS fires so other operators can check the same failure mode in their own fleets.

Treat a home battery in the room where a fire starts as a possible source until the investigation is finished, and do not treat suspicion as a confirmed cause.

A single Megapack clamp failure warrants fleet-wide checks on the thermal management system to prevent repeats.

Domestic battery storage systems can be linked to house fires, so installers must confirm systems meet manufacturer instructions and installation standards.

A single residential storage fire should not be read as proof that a particular model failed while the investigation is still open.

Keep the recorded cause open when investigators say it is undetermined, even if a most-likely electrical sequence is described.

Owners should keep batteries maintained and protected from damage and heat, and report faults or warnings to the installer, since damaged lithium-ion cells can go into thermal runaway.

Sites without recent detailed safety checks should be shut down promptly after any incident in the fleet.

An earlier fire at another KEPCO frequency regulation ESS did not prevent recurrence, so operators should carry out full fleet diagnostics after any single event.

Sites must complete root cause investigation before returning containers to service, as a second container fire occurred on 21 December 2017.

Until a fuller report is available, operators should not treat this case as evidence of a particular failure mode.

Where the cause is unknown, the site should be preserved for investigation before repair.

Where a fire destroys on-site solar installations, treat the cause as unconfirmed until a formal investigation reports.

Covering the panels was one tactic used to finish the fire; the cause was still under investigation.

Until police report the cause of a station fire, operators should avoid assumptions and keep records for investigators.

Fire damage to solar panels can destroy evidence, so operators should retain inverter telemetry for later analysis.

Until the cause is known, preserve evidence and treat the event as under investigation rather than assuming a single failure mode.

Installers must match solar unit type to the home's electrical system before fitting, as a mismatch caused two fires.

Homeowners should keep solar PV installations maintained in line with the installer's and manufacturer's guidance.

Involvement of panels is not, on its own, evidence that they caused the fire.

Where the cause is not known, keep the array and electrical equipment available for investigation before repair.

Where the cause is still under investigation, operators should treat animal intrusion as a suspected factor, not a confirmed one.

Complete and share the cause investigation so similar arrays can be checked.

A contained roof fire can still disrupt services, so operators should expect cancelled appointments and a follow-up investigation even when no injuries are reported.

A fire risk at one solar asset can affect several sites at once where equipment or design is shared across a fleet.

Operators benefit from knowing quickly which sites use the same equipment type so checks can be targeted.

Grid and generation equipment ownership must be clearly marked so fault investigations do not mix separate systems.

While the cause is under investigation, do not assume a single component failed, and keep the scene and records available to investigators.

Treat any early link to a panel power unit as provisional until the fire investigation is complete.

Treat an early finding that a fire does not appear suspicious as provisional until the cause and origin investigation is complete.

Suspected causes should be recorded as suspected until the investigation is complete.

Until investigators report a cause, operators should not treat either the array or nearby equipment as the established source.

Solar panels removed and reinstalled after roof repairs must be checked by a qualified installer before reconnection.

Where the cause is not yet released, operators should preserve the damaged panel and nearby wiring for investigation.

Treat early reports that solar panels appeared to have started a roof fire as unconfirmed until an investigation is complete.

Investigations into solar distribution-board fires should be shared so other operators can check similar equipment.

A same-day belief that a solar panel started a loft fire should stay provisional until a fire investigation reports the cause.

Once investigators name the failed part of the system, check similar rooftop arrays rather than treating the cause as closed on a general solar finding.

A fire at a solar farm requires prompt investigation to identify the cause before further events occur.

Operators should publish the cause and outcome of solar farm fires once investigations close.

Reporting the cause of domestic solar fires, once found, helps installers and owners spot common faults.

Electric faults in rooftop solar panels can destroy wiring evidence when heat burns it away, so record early observations of the fire origin.

Record the installer of each solar array to allow targeted checks after any fire.

Coordination with environmental bodies is essential where turbines stand in shared forest land, to manage temporary closures during investigation.

When the operator of a failed turbine is unclear, quick identification is needed to start the investigation.

After hub detachment, the operator took the entire wind farm offline as a precaution during investigation.

With no cause reported, operators should still identify the failed unit and preserve debris so the failure can be investigated.

Plan for investigation, safe removal and recycling or disposal of a failed turbine before the site returns to service.

After a turbine fire, the State Fire Investigation Unit inquiry can take several weeks because of scene complexity and investigator safety, so operators should plan for extended downtime.

A video title can show that a turbine fire was reported, but missing detail is not evidence that there was no damage or no response.

A claim that schedule pressure is competing with safety should be checked against the work controls, not treated as the cause until it is investigated.

Fallback paths are needed because loss of one communications channel left a large fleet without control for an unknown period.

Early sharing of preliminary findings lets other operators of the same model check their assets without delay.

Two turbines damaged at once at a wind site calls for checks on common mode failure in GE turbines until the investigation rules it out.

Treat the manufacturer's stated cause as a lead to check until an independent investigation is available.

Investigate turbine fires promptly, including events described as rare, and record which turbine model was involved.

A fatal event on site requires immediate work stoppage until the scene is secured and an external investigation begins.

Handover protocols between police, fire and the operator help scenes pass safely to technical investigation.

A fire at a 20-turbine site with no prior incidents since 2000 still requires full investigation before restarting the turbine.

When the root cause stays unknown, the operator should log the finding and check matching electrical systems across the fleet.

Do not state a cause until an investigation has reported one.

Taking a small part of a plant offline while the cause is investigated can limit further risk.

Operators should record the outcome of the investigation so similar turbines can be checked.

Delivery schedules for a new turbine model should wait on the outcome of any fire investigation.

When root cause analysis fails due to damage, check every similar turbine in the fleet as a precaution.

Early headlines give no cause, so operators must await full investigation before any diagnosis.

A second event at the same farm within two months, while the first still has no published update, is a reason to keep both investigations open and not treat them as one failure mode.

Joint investigation and repair plans with the turbine manufacturer must be agreed in advance to speed recovery after an incident.

Offshore wind farms in fishing areas need clear marking and communication to local fleets.

High potential near misses with no injury still need full investigation. Operators should submit and review anonymised cases so teams learn detachment modes seen elsewhere.

Precautionary no-sail zones around the same turbine model in multiple countries must be based on confirmed risk, not assumed fleet-wide failure.

Investigate unplanned movement of heavy-lift crane components even when no one is injured, so the cause is known before further lifting.

When the cause of a Siemens Gamesa turbine fire remains unknown, operators and the supplier must preserve and share site evidence before further work.

A multi-casualty event on an installation vessel should trigger an immediate return to port to preserve evidence.

Where the cause is not known when the fire is out, an investigation should start as soon as the scene is safe.

An ordered investigation should establish the cause before operators draw conclusions about the failure.

Do not state a cause until the investigation reports one.

Treat a suspected internal fault as unconfirmed until the investigation is complete, and do not return the circuit to service on that assumption alone.

Investigate the circumstances and causes of a fatal transformer explosion and share findings other operators can use.

Until investigators say otherwise, treat both equipment failure and nearby vehicle activity as open questions and preserve the scene.

Explosion sounds heard before a substation fire require evidence preservation and no assumed cause.

Do not state a cause or a link to other events until it is confirmed by investigators.

A suspected short-circuit should stay marked as unconfirmed until the investigation is finished.

When a pole-mounted transformer fails after a pole fall, treat the cause as unknown until the utility investigation is reported.

Where both a technical fault and a crime remain open, operators should preserve evidence and avoid closing the cause early.

A technical investigation into a transformer fire must continue alongside repairs, so operators should plan for parallel teams from the outset.

Until the investigation reports, the origin of the fire should be treated as unknown.

Do not treat the failed component as the root cause until the investigation is reported.

When a bang is reported but not confirmed, treat the event as unclassified until the official investigation concludes.

Reports of explosions and flickering lights can precede a substation fire, so operators should log and investigate such reports promptly.

Until investigators report a cause, operators should not treat a substation fire as explained.

The failed unit should be investigated promptly, because a single affected household can still leave the cause unknown at the time of the fire.

Do not treat suspected sabotage as a confirmed cause until an investigation is complete.

Maintain clear records of equipment status to support post-incident investigation.

Hand the scene to the network operator for damage assessment, and do not treat the cause as known until that investigation is reported.

Clear suspension of work and investigation protocols after containment reduce further risk.

Treat early reports of an explosion as unconfirmed until the investigation is complete.

Where two fires are involved, investigation should cover both the origin and how the substation was affected.

Battery fleets can inject 1.5 GW within seconds, so contracts should require fast response from aggregated assets across multiple optimisers.

Until the cause is known, operators should treat the event as under investigation and not assume a single failure mode.

Involve specialist investigators where irregularities are alleged around critical electricity assets.

Treat an initial official finding as preliminary until the full investigation is published.

Until an investigation reports a cause, treat the initiating failure as unknown rather than assuming a single component.

Until the cause is established, operators should treat the event as unexplained and preserve evidence for the investigation.

Where the cause is not known after the initial response, operators should preserve evidence and publish findings when they are established.

Cause investigations should be completed and the findings used to check similar sites.

Where the cause is not yet known, operators should preserve evidence and complete an investigation before drawing conclusions.

Where the cause is unknown, operators should investigate before treating the event as closed.

Where early reports disagree on cause, treat the cause as unconfirmed until the investigation is finished.

Early investigation and site control help when deliberate interference is suspected.

Where a distribution fire is reported soon after load-shedding, record the timing and wait for the investigation before treating shedding as the cause.

Root cause of a substation transformer fire remains unknown, so operators should complete and share a full post-incident investigation.

Operators should investigate substation fires and share the findings, so similar equipment elsewhere can be checked.

Where the cause is not yet known, keep the site attended and investigate before the equipment is returned to service.

A second fire at the same substation within months points to an unresolved cause, so a root cause investigation should be completed and acted on before equipment is returned to service.

Publish investigation findings when they exist, so other operators can see whether similar equipment is involved.

A serious injury and an unexplained transformer incident should be investigated with the relevant authorities before the unit is treated as fit to return.

Treat reported repeat failures on the same circuit as a prompt for investigation.

Give a clear restoration time and update it if the investigation changes the schedule.

Repeated interference with the same type of distribution equipment should be linked early and reported to police with added surveillance considered.

Access near the site may need a short closure while crews investigate.

Early notices should say what is known, including that the cause is still under investigation, and should be updated as restoration proceeds.

Stop and investigate after a failed re-energising attempt rather than repeat the switch-on operation.

Transformer explosions should be investigated and the cause recorded so that units of similar type and age can be checked.

The cause of a fire during first activation should be investigated before the asset is returned to service, and the findings shared with the operator.

Operators must complete a full investigation after any fatal substation incident before resuming similar tasks.

Treat the cause as unconfirmed until the investigation reports.

The stated failure mode and the underlying cause should be kept separate until an investigation is complete.

Check newly delivered customer equipment for packaging and other foreign material before it is energised. Do not treat an unconfirmed packaging theory as the cause until the investigation reports.

Until the cause is known, a reported site gas leak should be treated as an open investigation, not a confirmed equipment failure.

Repeated fires at different sites in the same city are a reason for operators to share what investigations find.

Investigate all electrical incidents promptly to identify and mitigate recurring hazards.

A delayed failover should be investigated, and the findings used to improve the response.

A post-event fire watch and removal of the affected cabinet from service allows safe handover even without an active fire.

Treat an official belief about cause as provisional until an investigation is reported.

Operators of three-and-a-half-year-old systems should review shared investigation findings to assess similar fire risks.

Separate unverified social media claims from the reported sequence until an investigation is available.