How To Care For Your EV or Hybrid When Not In Regular Use


Tips for your electrified vehicle when not in regular use.
Credit: Ford
If you’re like many Americans you’re likely using your vehicle a lot less frequently during COVID-19 with all the stay at home orders around the country. We’ve provided some car care tips here for when your car is parked for longer than normal. Ford is also offering up some tips on how to specifically care for electric vehicles that may not be in regular use right now.

The automaker says owners of battery-powered vehicles might wonder how much charge they should keep in their batteries and whether their batteries will become depleted if their vehicle is not used and recharged regularly.

In a press release, Ford calls upon battery expert Bob Taenaka, senior technical leader, Battery and Cell System Development, to share some tips on how to keep an electrified vehicle in top condition while self-isolating.

Tips To Keep Your Battery In Good Shape

First, Taenaka says the most important thing is to make sure your 12-volt battery stays charged and that your high-voltage battery has adequate charge - 10 percent or more. This will prevent it from potentially draining to zero percent. If you have driven and/or had your vehicle on plug for a total of at least 8 hours within the past month, the 12-volt battery should be adequately charged. For longer periods of time between driving, you should also take additional steps. Ford says you should always consult your owner’s manual for specific instructions on “Vehicle Storage” for longer than 30 days.

If you’re storing your battery electric vehicle without plugging it in, Taenaka recommends keeping it at a state of charge between 10 percent and 80 percent. (Ford says its hybrid and plug-in hybrid vehicles are designed to stay above a 10 percent state of charge during normal operation.)

A high-voltage battery above 10 percent state of charge can go for more than six months without charging, but the 12-volt battery will drain much faster, especially when connected to the vehicle. If you do not plan to drive your electrified vehicle for longer than 30 days, Taenaka recommends following these steps for the sake of your 12-volt battery:

  1. Disconnect the negative terminal of the 12-volt battery if you are familiar with and comfortable doing so. If not, proceed to one of the following two approaches.
    1. If it is a plug-in hybrid or battery-electric vehicle, leave it on plug.
    2. Connect your 12-volt battery to a standard 12-volt battery charger and leave it on a continuous slow charge

“If you are storing your vehicle for longer than 30 days without use, we recommend disconnecting the negative terminal of your 12-volt battery,” says Taenaka.“This avoids depletion and potential damage to the battery, which runs the internal systems such as heating -- without the need for monthly maintenance.”

Disconnecting the Battery

If disconnecting the 12-volt battery, follows these additional tips:

  • Be sure to have your key fob and digital owner’s manual (on your smartphone/tablet or through prints) with you outside of the vehicle, because you may need to use the physical key (inside the fob) to lock and unlock the vehicle, plus the owner’s manual will be handy for further reference.
  • If the vehicle is in a locked garage and the 12-volt battery is in the trunk, leave the trunk open
  • Once you have disconnected 12-volt power, you can lock and unlock your vehicle with the physical key
  • And finally, if your 12-volt battery is in the trunk but you are not storing the vehicle in a locked garage, you will need another 12-volt source. Follow the “jump start” instructions in the owner’s manual to restore 12-volt power to the vehicle in order to reopen the trunk.

Warm Temps And Batteries

Warm temps can also have an impact. Electric vehicle batteries are designed to handle long-term storage outside in direct sunlight. Taenaka says that if you are experiencing extreme hot weather and the vehicle needs to be stored for more than 30 days, if practical for you, store your vehicle in a garage or in the shade to preserve battery capacity and extend its life span.

Note: Always refer to your owner’s manual for important details about storing your vehicle and removing it from storage.
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