Thanks for this thread and bringing to our attention the iammeter OCPP simulator, which is really useful for testing.
I also wanted to highlight the strong alignment between OCPP to control your EV charging (and discharging) and EMHASS: An Energy Management for Home Assistant.
I am using EMHASS extensively to coordinate the charging of EV during the cheapest windows of the day, including consuming excess solar, but also to determine the optimal times to export, using V2G functionally which is supported under OCPP 2.0.1.
Does the iammeter OCPP simulator also support exports from the vehicle?