For back-up power? Not directly, no. A manual transfer interlock would be required to switch from utility power and none are listed for TL17US. This could be conceivably be done with an upstream double throw switch like DTGNF223NR.
Consider instead TL1F7US which comes with a QF250A 2-pole GFCI breaker installed.
TL17US has a 4 space load center with one 2-pole breaker and one 1-pole breaker, each factory installed and feeding its respective receptacle. These can be replaced as needed but not substituted for. Installation of QT Duplex and Quadplex breakers would void UL and would not be approved.
Yes, and there are spare/open lugs for binding neutral and ground wires.
No, TL17US2 is the loop feed version. Please see below cut sheet link. https://www.industry.usa.siemens.com/topics/us/en/talonmetering/literature/Documents/TLXXUS2.pdf
Not really... Aside from the ability to actually plug into the receptacle, Electric Vehicle Building Codes also come into play... Here in California, which uses the same base electrical code as everyone else, the "Readily Accessible" disconnect has to be lockable, this switch isn't, and the cover, which may disqualify "readily accessible", doesn't seem to be either... Also, if your charging is done indoors, you need to have mechanical ventilation of ~250 CFM, that is directly connected to the power supply for the charging so that whenever the car (i.e. battery) is charging, the mechanical ventilation is also working, so the breaker in the box has to be used as an On/Off switch for the charger... How many "On/Offs" can a "Circuit Breaker" take before it needs to be replaced? I'm looking for the answer to the same situation, but this seems to fall a little short
Conduit and wiring can enter the bottom of the unit. That is how I installed it.
I would suggest #6.