By using a 240-volt circuit (such as the outlet for an electric dryer), the car might be able to receive 240 volts at 30 amps, or 6.6 kilowatt-hours per hour. This arrangement allows significantly faster charging, and can fully recharge the battery pack in four to five hours.
EXFat is just an extended version of the FAT format. Unlike FAT, and FAT32, it can support files as large as 16 Exbibytes, and can support disk sizes up to 64 Zebibytes. FAT32 only supports files as large as 4GBs, and drives as large as 2TBs.
Note that all these size limits are based, not on the original file size, but the MIME-encoded copy. The common Base64 encoding adds about 33% to the original file size, meaning that an original 20MB file could exceed a 25MB file attachment limit.