YachtByte Official Resource
Battery identity
- Battery location recorded.
- System served recorded: start, emergency, UPS, service, AV/IT, communications, tender, toy, portable, propulsion or ESS.
- Battery chemistry recorded: flooded lead-acid, AGM, gel, OPzV, OPzS, lithium-ion/LFP, nickel-cadmium or other.
- Manufacturer, model, serial number and installation date recorded.
- Voltage, capacity, string arrangement and protected load recorded.
- Charger, inverter-charger, alternator, DC-DC charger or BMS identified.
Space and installation condition
- Battery space is clean, dry, ventilated and accessible.
- Batteries are secured against movement.
- Battery boxes, trays, racks or containment are intact.
- No loose items, tools, combustibles or unrelated storage in the battery space.
- Terminals are protected against accidental short circuit.
- Cables are supported and protected from chafe.
- Labels, polarity markings and isolation points are clear.
- Ventilation path is clear and operating where fitted.
Visual defect check
- No swelling, cracking, bulging or case deformation.
- No leakage, acid residue, salt contamination or chemical staining.
- No unusual smell, heat, smoke, venting or noise.
- No corrosion on terminals, links, busbars or lugs.
- No discoloured insulation, heat marks or melted terminal covers.
- No damaged charger leads, sense wires or BMS communication cables.
- No signs of water ingress.
- Photos taken for any abnormal condition.
Charging and configuration
- Charger profile matches the installed battery chemistry.
- Absorption, float, equalization and lithium settings checked against known configuration.
- Equalization disabled unless specifically approved for the battery type.
- Temperature sensor installed correctly where required.
- Battery monitor, BMS, UPS or charger alarms reviewed before reset.
- Charge voltage, charge current and battery temperature recorded.
- Recent charger changes, replacement batteries or service work reviewed.
Testing and records
- Open-circuit voltage recorded where appropriate.
- Specific gravity recorded for flooded cells where applicable.
- Conductance or internal-resistance test recorded where appropriate.
- Load test or controlled capacity test scheduled for critical banks where required.
- UPS runtime or graceful shutdown test confirmed where applicable.
- Start battery cranking performance reviewed.
- Test results compared with previous readings.
- Defects, corrective action and next inspection date recorded.
Storage and portable batteries
- Spare lead-acid batteries stored charged and inspected at the required interval.
- AGM and gel batteries stored cool, clean and recharged as required.
- Lithium packs stored at manufacturer-specified state of charge.
- Portable batteries not stored or charged in escape routes.
- Damaged, swollen, hot or suspect lithium packs quarantined.
- Charger type checked for tenders, toys, tools, radios, laptops and guest devices.
- Failed or end-of-life batteries marked and removed for approved disposal.
Escalation triggers
- Stop and escalate any swollen, hot, leaking, smoking or venting battery.
- Stop and escalate any repeated BMS, UPS, charger or inverter alarm.
- Stop and escalate damaged lithium packs or unknown lithium chemistry.
- Stop and escalate failed emergency, generator start, radio, alarm or safety-system batteries.
- Stop and escalate signs of overheated terminals, loose links or cable damage.
- Record operational impact and notify the responsible officer where a critical load is affected.