Store an EV by leaving it plugged into your home charger with a moderate charge limit set, as most manufacturers recommend. Turn off the features that keep waking the car, plan for the small 12-volt battery, and check in through the app every week or two. A car set up this way can sit for weeks or months and be ready to drive when you return.
Key Takeaways
- Store the car plugged in with a moderate charge limit set, per the maker’s guidance.
- Turn off security, climate and timer features that keep waking the car.
- Plan for the 12-volt battery; it fails before the traction battery does.
- Check in by app weekly, and run the wake-up checklist before the first drive.
Why a Parked EV Still Loses Charge
An EV is never fully off: telematics, keyless entry and battery management stay alive, and security cameras or cabin overheat protection draw much more. Our explainer on whether an EV battery drains when parked covers where that energy goes. For storage, drain is only half the story: a traction battery also ages fastest at the extremes, so months parked at 100% or near empty is poor practice. The U.S. Department of Energy puts battery life at 12 to 15 years in moderate climates, and storage habits help protect that life.
Set the Car Up Before You Leave
Work through this list on the day you park the car:
- Set a moderate charge limit. Follow your car maker’s storage guidance; many suggest a mid-range level rather than full, set as a limit in the car or charger app.
- Leave it plugged in where you can, so the car tops itself up in small amounts instead of draining steadily down.
- Switch off wake-up features you do not need: sentry modes, cabin overheat protection, departure and pre-conditioning timers.
- Park it clean and covered where possible, connector clicked fully home, cable off the ground.
- Note the charge level and date in your phone, so your check-ins mean something.
| How long parked | Plugged in? | Charge limit | Check-in plan |
|---|---|---|---|
| A few days | Optional | Your normal limit | None needed |
| Two to six weeks | Yes, if you can | Moderate, per the manual | App check once a week |
| Over a month | Strongly recommended | Moderate, per the manual | Weekly app check, plus a 12-volt plan |
The 12-Volt Battery Is the Weak Point
Most storage surprises are not about the big battery, but the small 12-volt battery that runs the locks, screens and computers. If it goes flat, the car may not wake at all, even with charge in the main pack. Whether the main battery tops the 12-volt one up while parked depends on the model, as our guide to whether charging an EV charges the 12V battery explains. For a long park, pick one: a trusted person drives the car briefly every few weeks, a 12-volt maintainer if the maker allows one, or a jump-start on your return. Do not disconnect the 12-volt battery unless the manual says so.
Chargers That Suit a Stored Car
A wall charger that stays connected and follows a limit you set is the easiest storage partner. The EV-ACT5006T 48A Level 2 wall charger can be hard-wired or plugged into a NEMA 14-50 outlet, and its app lets you see the car’s state from away. If the car is stored at a second home or a rented garage, a portable unit such as the EV-ACS3210T 32A NACS portable charger does the same job from a 240-volt outlet and comes home with you afterwards.
Waking the Car Up When You Return
- Check the app first: charge level where you left it, no fault messages.
- Look over the cable and connector for moisture, insects or damage before you unplug.
- Unlock and wake the car; if the 12-volt battery is flat, follow the maker’s jump-start procedure rather than improvising.
- Restore your normal charge limit, schedules and security features.
- Take a short first drive and confirm the car charges normally that night. Cold-weather storage adds a few checks, covered in our guide to cold-weather EV charging.
Frequently Asked Questions
Should I leave my EV plugged in for a month?
Yes, in most cases: plugged in with a moderate limit set, the car tops up in small amounts and the battery stays in its comfort zone. Follow your maker’s storage instructions if they say otherwise.
What charge level is best for long-term storage?
A moderate level, not full and not empty. Many makers suggest roughly half, but the right figure is the one in your manual, set as a charge limit so the car holds it.
Will the 12-volt battery die while my EV is stored?
It can; it is the most common storage problem. Some cars top it up from the main battery while parked, others do not. A maintainer, a helper who drives the car, or a planned jump-start covers the risk.
Related Reading
- Does an EV Battery Drain When Parked?
- Does Charging an EV Charge the 12V Battery?
- Does Level 2 Charging Shorten Battery Life?
- Cold-Weather EV Charging: What Happens Below Freezing
