Is there any efficient way of modelling electric vehicles that are connected to the system and operate as storage units when plugged in?
If you want to use electric vehicle as a storage module which when plugged in both charges and discharges to serve the load and if it's a grid connected system, you can use scheduled rates. This way you can prohibit the battery from charging or discharging during specific period in the day. If you just want to use the electric vehicle as a charging load, then you can model it as an additional load by modifying the load profile for specific period of the day when you want to charge it. Hope this helps.