You can charge an electric vehicle with the Titan, as with any portably system, it will be slow.  Also many electric vehicles the input to have a ground bonded to the neutral (The Titan uses a floating ground). There are adaptors you can buy to plug into the outlet of the Titan to bond the ground and neutral to make this work.  This is actually easy to fix with a $10 adapter.  However we don’t give electrical advice, so you should talk to a certified electrician to verify this will work safely in your situation.

The other issue is that with a level one charger it will take 4 days (24 hours per day) to charge a Tesla (hybrids like a the Chevy volt will not be nearly as long), and even with 2,000 watts of solar you could only charge for about 4-5 hours per day which means it would take about 19-24 days to charge.  This makes it a little impractical to use all the time for a Tesla.