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Energy ESS Deckhouse

Marine Energy Storage System · Battery & UPS Systems

Class-certified type (DNV register) · technical data sheet not yet verified​​⁠⁠⁠‌‌‌‌⁠‍‍⁠‍⁠‍‌​⁠⁠

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Inspection

Inspector Detail

Common issues

  • Cell/module voltage imbalance developing across the battery bank over time
  • BMS communication faults between the deckhouse and the power management system
  • HVAC/cooling underperformance leading to elevated cell temperatures
  • Insulation resistance degradation from moisture ingress into the container
  • Fire suppression system losing charge pressure between inspections
  • Corrosion at battery module cable lug connections

Inspection checklist

  • Review BMS alarm and event log since the last inspection
  • Check cell/module voltage spread against the maker's stated limit
  • Test insulation resistance of the DC battery circuit
  • Inspect HVAC filters and confirm cooling airflow across the modules
  • Verify fire detection and suppression system charge/pressure
  • Check deckhouse/container seals and drainage for water ingress
  • Test the emergency shutdown and main disconnect function
  • Check earth fault monitoring is active and untripped

Service intervals

BMS function checkevery 12 months, aligned with class survey
Insulation resistance testannually
HVAC filter cleaning/replacementevery 3-6 months depending on environment
Fire suppression system inspectionannually, per the suppression system maker
Cell/module voltage balance verificationcontinuous via BMS, manually confirmed at each survey

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Typical wear limits

Battery state of health (capacity fade)commonly an alarm/replacement action is set in the region of 70-80% of rated capacity for marine ESS - confirm the exact threshold against Kongsberg's own limit for this system
Cell/module voltage imbalanceclass-dependent, but a spread beyond the maker's stated threshold signals imbalance requiring investigation - confirm against this system's own BMS limit

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

  • Battery module matched in state-of-health to the remaining bank (do not mix ages/SOH within a string)
  • BMS communication card
  • HVAC filter set
  • Main DC contactor
  • Fire suppression trigger head
  • Cooling fan unit

Safety

  • Stored energy remains in the battery even with the main breaker open - only trained personnel should enter the deckhouse for electrical work
  • Thermal runaway can propagate cell-to-cell - follow the maker's isolation and venting procedure; do not apply water to a lithium battery fire without maker guidance
  • Arc flash risk exists at the DC busbars
  • If off-gassing is suspected, treat as a confined-space/gas hazard and ventilate and monitor before entry

Class survey

Energy storage installations carry a battery class notation requiring periodic survey of BMS function, fire detection/suppression, ventilation and documented maintenance against the system's FMEA. Any module replacement should use maker-approved parts, and the as-built single-line diagram must match the installed configuration.

Estimated lifetime: not meaningfully expressed in running hours; marine ESS service life is normally stated by the maker in cycles or calendar years (commonly in the order of 10-15 years, or a defined cycle count) - confirm against Kongsberg's warranty and service documentation for this installation

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