https://insideevs.com/features/739431/ev-electric-car-long-term-storage-parking/
You want to leave an EV battery with a good amount of charge. There will be some drainage over more prolonged periods from sources such as background processes and the vehicle’s 12V battery. You want enough range for the EV to be usable when you return. As with standard EV charging, it’s best to avoid the vehicle spending too long at extremes (above 80 percent charge or below 10 percent charge) which can damage the battery.
Recommendations for best storage practices differ depending on the EV manufacturer (consult your owner’s manual). Most suggest maintaining a charge of around 50 percent. Some recommend leaving a vehicle on the charger. Keeping the EV plugged in lets you set the vehicle’s charge limit to 50 percent, allowing the EV to maintain temperatures and top itself off as needed. Other brands recommend leaving their EV off the charger and disconnecting the 12V battery or placing it on a trickle charger like you would with a stored combustion vehicle.
Check your manual.
Move or take the weight off the tires
An important way to preserve battery life is to disable as many background processes as possible. Tesla’s Sentry Mode is a noted resource hog that can drain EV batteries. However, smaller ticket items like software updates or even checking the vehicle status remotely can do so, especially if they need to wake the vehicle from a low-power sleep mode.