Storage methods for electric vehicle chargers that have not been used for a long time

Long-Term Storage Guidelines for Electric Vehicle (EV) Chargers

When an EV charger is not in use for extended periods, improper storage can lead to electrical damage, component degradation, or safety risks. Following structured preservation methods ensures the device remains functional and safe when needed again.

Preparing the Charger for Storage

Proper preparation minimizes the risk of corrosion, electrical faults, or physical damage during long-term inactivity.

Disconnecting and Powering Down Safely

• Unplug from the Electrical Supply: Always switch off the circuit breaker or disconnect the charger from the mains to prevent accidental activation or power surges.

• Detach the Vehicle Cable: Remove the charging cable from both the charger and the vehicle’s port to avoid strain on connectors or accidental damage.

• Secure Loose Components: If the charger has removable parts (e.g., cable holders or covers), store them separately in a labeled container to prevent loss.

Cleaning the Charger Before Storage

• Remove Dust and Debris: Use a soft, dry cloth to wipe the exterior casing, paying attention to ventilation grilles and cable entry points where dirt may accumulate.

• Avoid Harsh Chemicals: Do not use abrasive cleaners, solvents, or water to clean the charger, as these can damage seals or electrical components.

• Inspect for Damage: Check for cracks, loose seals, or signs of corrosion on connectors. Address minor issues before storage to prevent worsening over time.

Protecting Connectors and Cables

• Cover Connectors: Use protective caps or dust covers designed for EV charging ports to shield them from moisture, dust, and insects.

• Coil Cables Properly: Avoid sharp bends or kinks when storing the cable. Use a figure-eight loop or a dedicated cable organizer to maintain flexibility.

• Store Cables Indoors: If possible, keep the cable in a climate-controlled environment to prevent UV degradation or extreme temperature exposure.

Choosing the Right Storage Environment

The location and conditions of storage play a critical role in preserving the charger’s integrity.

Ideal Temperature and Humidity Levels

• Avoid Extreme Temperatures: Store the charger in a place where temperatures remain between -10°C (14°F) and 40°C (104°F). Fluctuations outside this range can weaken plastic components or affect battery-backed memory (if applicable).

• Control Humidity: Aim for relative humidity below 60% to reduce the risk of condensation or corrosion. Use dehumidifiers in damp areas like basements or garages.

• Prevent Direct Sunlight: Prolonged UV exposure can fade labels, crack plastic casings, or degrade seals over time.

Shielding from Environmental Contaminants

• Elevate Off the Floor: Place the charger on a shelf or pallet to protect it from ground moisture, pests, or accidental spills.

• Use Breathable Covers: If storing outdoors or in a dusty area, cover the charger with a loose-fitting, breathable fabric (e.g., cotton) to allow airflow while blocking debris. Avoid plastic tarps, which trap moisture.

• Keep Away from Chemicals: Store the charger away from gasoline, solvents, or cleaning agents, as fumes can corrode metal parts or damage plastic.

Preventing Physical Damage During Storage

• Avoid Heavy Objects on Top: Do not stack boxes or equipment on the charger, as this can crack the casing or misalign internal components.

• Secure in a Stable Position: If wall-mounted, ensure the bracket is firmly attached and the charger is not hanging at an angle that stresses the casing.

• Label Storage Containers: Clearly mark boxes or shelves containing charger components to avoid accidental drops or mishandling during retrieval.

Monitoring and Maintaining the Charger During Storage

Regular checks ensure the charger remains in good condition and ready for use when needed.

Periodic Inspections for Wear or Damage

• Visual Checks: Every 3–6 months, inspect the charger for signs of pest infestation, mold, or water stains, especially if stored in a garage or shed.

• Test Connectors for Tightness: Gently wiggle the cable connectors to ensure they remain securely attached to the charger. Loose connections can lead to arcing or corrosion over time.

• Check for Foul Odors: A musty or burning smell may indicate internal moisture buildup or electrical degradation, requiring professional evaluation.

Recharging Battery-Backed Components (If Applicable)

• Understand Backup Power Needs: Some chargers use small batteries to retain settings or logs. If the manufacturer recommends periodic recharging, follow their guidelines to prevent data loss.

• Use a Trickle Charger: For removable batteries, store them separately in a cool, dry place and recharge them every 6–12 months using a dedicated trickle charger.

• Avoid Full Discharge: Do not let backup batteries drain completely, as this can shorten their lifespan and make them harder to recharge later.

Updating Firmware or Software (Before Extended Storage)

• Check for Manufacturer Updates: If the charger supports firmware upgrades, install the latest version before storage to ensure compatibility with future vehicle models or grid standards.

• Document Update Procedures: Keep a record of the firmware version and update steps in case the charger’s interface changes during storage.

• Reset to Factory Settings (Optional): If the charger stores user preferences or charging histories, resetting it may prevent conflicts when reused. Consult the manual for guidance.

By following these steps, EV owners can ensure their chargers remain in optimal condition during long-term storage, reducing the need for costly repairs or replacements. Regular maintenance and a controlled environment are key to preserving functionality and safety.