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Message: <blockquote data-quote="rudholm" data-source="post: 5846603" data-attributes="member: 63972">There's really nothing to do to the battery after sitting.  As long as it was plugged in, it'll maintain its health on its own.  If you have a 240V electric clothes dryer outlet in or near your garage, that's a perfectly suitable power source for 240V charging (that's what I used until I got my second electric car).  240V charging is a good idea because with 120V charging, the car can't cool the battery as effectively.If you don't already have them, you will want to get [USER=8203]@hcsharp[/USER]  's CAN-JR and CAN-SR adapters so you can charge off the ubiquitous modern Tesla and J1772 charging nozzles.  If the car didn't come with the 240V mobile charging cord, you might want to consider buying a new mobile charging cord from the Tesla website.  It's the one they include with new Teslas and it will work with the Roadster if you have a CAN-SR.  It's a good cord, and the various plug ends are only $35 each.</blockquote>