The city of Seattle is requiring new commercial buildings to include at least a provision for future electric vehicle charging equipment. The requirement is that the service equipment must include the capacity to handle one EV charger for every parking spot in the building. They did provide a table of demand factors, but still the amount of load that this adds to the service rating is huge! For one high rise building we are presently designing, EV charging adds about 1300 amps (@480V) to the service load calculation.
There is a new sentence in the 2014 NEC article 625.41 that allows us to assign an even lower amount of load for EV charging, provided that we design in at least a provision for a future electric vehicle charging "automatic load management system." An Internet search has led me to a number of companies that want to sell me their charging systems. But I have not come across a discussion of a load management system. So my questions are,
Has anyone included a load management system in their design or installation in any recent projects?
Does anyone know of a manufacturer to whom I can turn for information on such a system?
Has anyone taken advantage of the new allowance in 625.41 to reduce the calculated load on a service?
If the answer to #3 is yes, can you share any details?
Just search the Web for "EV adaptive load control features" because that's what you are looking for. There is only one solution (patented) and it should be at the top of the ensuing page.
