In terms of cost, the TWC wins vs. the competition in $/watt delivered.
About the only caveat I'm aware of is something that New Jersey's doing. If one has a particular wall connector that can be rigged to report energy usage back to the Public Utility mothership, one can get reduced electricity rates on the electrons from that utility. Let me check.. It's a state program, but it's administered through the utilities. PSE&G says that to get a $0.02/kW-hr, off peak reduction for electric vehicle charging costs, one has to have a "Level 2 Smart Charger". The list of chargers/wall connectors are
PSE&G Approved Charger List:
- ChargePoint Residential & Commercial Smart Level 2 Chargers
- ChargePoint Software (ABB)
- JuiceBox (EnelX) Residential & Commercial Smart Level 2 Charger
None of which are Tesla. I actually contacted both PSE&G and Tesla and, well, no go. From what I can tell, Tesla's mothership can get the charging data with the right options set on the Gen 3 WC, but there's no data path available to go back to an entity like
PSE&G. The other utilities in NJ have similar programs. Don't know what, if anything, Maryland is doing in this regard, but it might be worthwhile to check.
Again, this is
NJ over here. There are various rebates for installing Wall Connectors, assistance in dropping heavier power lines in case one's breaker box doesn't have sufficient amperage, and so on. Heck, we don't even pay sales tax on EV's! Let me check Maryland.. Yep, they got
lots. Suggest you push your way through the link and see what they've got for you. A quick perusal seems to indicate that you'll get reimbursed for the full cost of the charging station and at least some of the utilities have reduced rates for EV charging.