What simple calculations are you referring to? Lithium batteries take 1 hour to charge. The Tesla simply uses a large array of lithium batteries. If one charge worth’s of electricity flows at 110V in 8 hours, the same amount should flow at 880V in 1 hour... providing you can safely transfer the electricity. My question, and I worded it as a question, (even adding “and this might be in the category of just plain ignorant”) was whether that could be done.
At 880V you would exceed the insulation rating of the energized equipment and destroy it with arcing faults.
Most electrical equipment is designed to a standard 600V (rms) rating.
I meant the calculations of cost to create these 880V charging stations for a new and extremely minor part of the market