Level 1 systems, which run on the same 120-volt current as US households and uses the standard SAE J1772 connector, only add about six miles of range per hour of charging to a typical EV. More importantly, the L1 Power Post, which Telefonix recently showed off at a Florida conference, will cost about $1,500. That's about 25 percent of what many public Level 2, 240-volt chargers cost, although those add as many as 25 miles of range in an hour.
Telefonix, which has been in operations for about a quarter century, is banking on cash-conscious public and private entities to buy its systems, noting that a Level 1 charging station at a workplace will still provide more than enough juice during a typical workday to get many EV drivers home. Telefonix notes that hotels and airports are other places that wouldn't require the speed of a Level 2 charger in most situations.