HOMER Knowledge Base
EV Charging Output
I am trying to understand the components of the EV Charging algorithm in order to confirm the reliability of some models that I am running. One big question that keeps coming up is - how does the algorithm treat realized output from a charger? If I am modeling a 150kW charger connected to a vehicle that can accept 150kW, does the algorithm assume that the charger is pushing 150kW for the duration of the charging session? Or is it more akin to actual charging behavior where the charge peaks at some point, slows a high level for a while, and then tails off in capacity as the battery reaches full charge?
The output behavior depends on which type of EV charger is being used.
The On-Demand EV chargers are outputting their full rated power (150kW in your example) the whole time the vehicle is connected.
The Deferrable EV chargers will output different rates of power during a session, depending on the system's energy available, demand charges, grid prices, etc. with the overall goal of charging the vehicle fully.
Regardless of the charger type, HOMER does not reduce charging once a high or low SOC has been reached until fully charged, as described in your last sentence.
The output behavior depends on which type of EV charger is being used.
The On-Demand EV chargers are outputting their full rated power (150kW in your example) the whole time the vehicle is connected.
The Deferrable EV chargers will output different rates of power during a session, depending on the system's energy available, demand charges, grid prices, etc. with the overall goal of charging the vehicle fully.
Regardless of the charger type, HOMER does not reduce charging once a high or low SOC has been reached until fully charged, as described in your last sentence.