Check Tank 300 low-voltage battery health, sleep current, accessory wiring and storage recovery before overseas shipment.
Record battery identity and recent handling
Photograph battery type, rating, production code, terminals, hold-down and any battery-management sensor. Ask when it was last charged, boosted or replaced and how long the vehicle has been stored. Measure open-circuit voltage only after an appropriate rest; then perform a test suitable for the battery technology and record temperature. Inspect for corrosion, swelling, electrolyte leakage, damaged cables and improvised earths. A recently charged weak battery can show acceptable voltage briefly, so connect voltage with conductance or load evidence and actual start behaviour.
Test charging and sleep behaviour
Record cranking voltage, charging voltage and relevant diagnostic data with standard electrical loads operating. After shutdown, lock the vehicle and allow the documented sleep period before measuring current draw with appropriate equipment. Observe whether accessories, keys, phone pairing or aftermarket modules prevent sleep. Repeat the sequence after isolating suspect circuits; do not pull fuses casually if that erases evidence or triggers programming needs. Save module faults before clearing them because undervoltage can create a broad but informative event history.
Audit every accessory circuit
Trace dash cameras, trackers, lighting, audio, compressors, winches, refrigerators, radios and trailer wiring from source to load. Confirm fuse location and rating, relay use, conductor protection, connectors, earth points and clearance from heat, water, steering and sharp edges. Check that high-current equipment does not rely on the vehicle body or a small factory circuit inappropriately. Record which items will ship, which will be removed and whether removal restores weather sealing. An accessory that functions once is not proven safe or free from standby draw.
Prepare storage, shipment and arrival recovery
Agree a state-of-charge and periodic maintenance plan for the expected storage and transit period. Confirm carrier rules before disconnecting a battery or leaving an alarm inactive. Photograph odometer, warnings and operating state at handover, protect terminals and keep approved recovery instructions with the destination agent. Budget replacement based on measured health and elapsed storage, not age alone. After arrival, inspect voltage before repeated start attempts, charge correctly, rescan modules and verify windows, steering, camera or other learned functions according to the exact vehicle procedure.
Evidence to collect
- Battery identity and production code
- Rested health test
- Cranking and charging readings
- Sleep-current measurement
- Accessory circuit register
- Shipment and arrival recovery plan
Apply the guide to a real candidate
Create a VIN-linked evidence file
Keep the dated photographs, measurements, scan report and road-test conditions together under one VIN. A seller statement or image without vehicle identity is useful for screening but not for final approval.
Define the acceptance boundary
Mark every checklist item confirmed, unresolved or rejected. Assign the next test, responsible party and deadline so uncertainty is not hidden inside a general condition description.
Carry the result into landed cost
Separate repair, preventive work, destination diagnosis and contingency. The quotation should state whether work occurs before export or after arrival and who carries the risk if the result changes.
Final approval control
Approve this tank 300 12v battery, storage and accessory load checks only when the exact VIN, test conditions and supporting records are reproducible. Pause when a critical result depends on a cleared fault, unrelated vehicle, unverified seller statement or unavailable destination support. Record accepted exceptions and their cost before payment; otherwise reject the candidate and continue sourcing.
Primary references
Specifications and equipment can vary by market, model year, trim, VIN and production batch. Verify the exact vehicle and current destination rules before purchase.
Official GWM Tank 300 model brochure ↗Frequently asked questions
Does a successful start prove the 12V battery is healthy?
No. Recent charging can mask low reserve capacity or abnormal sleep current.
Should the battery be disconnected for shipping?
Only after confirming carrier rules and the vehicle-specific consequences for alarms, locks and learned functions.
Can low voltage create many diagnostic codes?
Yes. Preserve the initial scan, correct the supply issue and then identify which faults return.