If you only drive 20 miles/day, have hours to charge it (overnight) and don't have time-of-day, you're unlikely to make back the $$ you pay to upgrade the panel and wire 220. Find a plug on its own 110 circuit in the garage and charge with the included charger.
yea I’m leaning that way. Can I use regular heavy duty extension cord? Jlong is so expensive. Another option is to have someone help me making an outlet outside of garage so I won’t need extension. My worry is when it rains...
how much did it cost you? May have to replace my panel because it’s really old and maybe only support 110v
No, you can't use a regular extension cord safely: You'll want to use one that's 12 AWG.Can I use regular heavy duty extension cord? Another option is to have someone help me making an outlet outside of garage so I won’t need extension.
Remember that it's not only that gauge of the cord, it's also the length, and you should consider the length of the run of cable from your circuit panel to your outlet. The longer the run of either the cord or the cable, the more the voltage drop. I would use no smaller than 12 gauge for the extension cord, and I would get the shortest run of it that will work. Don't use a 50' cord is 25' will do, and I wouldn't use 25' if 20' or 15' would do (particularly if there is a long cable run between the circuit panel and the wall outlet).Again, per the manual, you can’t “safely” use an extension cord with the OEM L1 cable. This would apply to both the “regular heavy duty” type as well as the “heavy duty” ones. 12/3 usually qualifies for either ranking.
As for having a dedicated circuit for the L1 cable. It may be desirable, but it isn’t necessary.
Remember that it's not only that gauge of the cord, it's also the length, and you should consider the length of the run of cable from your circuit panel to your outlet. The longer the run of either the cord or the cable, the more the voltage drop. I would use no smaller than 12 gauge for the extension cord, and I would get the shortest run of it that will work. Don't use a 50' cord is 25' will do, and I wouldn't use 25' if 20' or 15' would do (particularly if there is a long cable run between the circuit panel and the wall outlet).