A simple search https://www.google.com/search?q=Chevy+Volt+long+storage gives:
https://www.chevrolet.com/content/dam/Chevrolet/northamerica/usa/nscwebsite/en/Home/Ownership/Manuals_and_Videos/02_pdf/2k13volt.pdf 2013 Chevrolet Volt Owner Manual Vehicle Care 10-23 Vehicle Storage { WARNING 12‐volt batteries ... See Jump Starting on page 10‑69 Up to four weeks . Plug in the high voltage battery charge cord if temperatures will exceed 35°C (95°F) and keep the 12-volt battery cables connected. Four weeks to 12 months . Discharge the high voltage battery until two or three bars remain on the battery range indicator (Battery symbol) on the instrument cluster. . Do not plug in the high voltage battery charge cord. . Remove the black negative (−) cable from the 12-volt battery and attach a trickle charger to the battery terminals or keep the 12-volt battery cables connected and trickle charge from the underhood remote positive (+) and negative (−) terminals. See Jump Starting on page 10‑69 for the location of these terminals. Notice: The vehicle is equipped with an AGM/VRLA 12-volt battery, which can be damaged by using the incorrect type of trickle charger. An AGM/ VRLA-compatible charger must be used, with the appropriate setting selected. Follow the trickle charger manufacturer instructions. Reconnecting the 12-Volt Black Negative Cable With the 12-volt black negative (−) cable disconnected, the hatch cannot be opened by pressing the hatch release button. If the hatch is closed and latched, reopen it: 1. Use the door key to open the driver door. 2. Manually unlock and open one of the rear doors. 3. Lower one of the rear seatbacks. 4. Pull the load floor cover forward to access and reconnect the 12-volt battery black negative (−) cable. 5. After the cable has been connected, open the hatch and then tighten the cable. After the battery cable is reconnected, it is possible that the vehicle may not operate in Electric Mode. If this happens, the high voltage battery may need to be charged ... https://www.google.com/search?q=Chevy+Volt+long+storage+site:gm-volt.com Your question is better suited to be asked on a volt pih forum: http://gm-volt.com/forum/showthread.php?145514-Volt-Long-Term-Storage http://gm-volt.com/forum/showthread.php?258377 http://gm-volt.com/forum/showthread.php?245666-Long-term-fuel-storage-in-tanks-and-battery-coolant-top-off IMO, the problem with chemical fuels like gasoline is as they sit and age, they can get gummy, which could lead to problems. Thus, I suggest before you put any chemical fuel vehicle (ice, hev, pih, etc.) into long (6+mo) storage, if the fuel is already old (you drive mostly in Electric-only mode), use up that old-fuel, then put in a few gallons of fresh fuel, and drive at high speeds just long enough to run that fresh fuel into its ice. Then (short of adding a GM recommended fuel preservative as well) you will have the freshest fuel when you return to fire the ice up. For EVLN EV-newswire posts use: http://evdl.org/evln/ {brucedp.0catch.com} -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Chevy-Volt-in-long-term-storage-tp4684260p4684265.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
