Part of the problem with the battery gas can projects I have seen so far is that they make a battery pack, with an inverter to hook into the ac charger on the car. There are a lot of losses involved with that double conversion. If they would apply a DC-DC converter, or build a pack with slightly greater than 400v more of the energy from the "gas can" would make it to the car.
I am on the fence so far about the solar tanaeu cover as well and I live in an ideal locaton for solar. It would depend on how much it costs, and whether or not our budget can handle the extra cost. As it is we might be pushing the upper limits on what we can/are willing to afford.
I am hoping that there will be an option to get the 500 mile pack for the dual motor.
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