Is DESS available for the EDF Freephase dynamic tariff yet? If not, is there any way I can write the connector, there is a pretty easy api on the EDF site 
I don’t know if the tariff is on VRM yet, but it’s pretty easy to write a connector (I’ve done this for my utility). You can use NodeRed on the Cerbo to accomplish this… 1) pull the buy/sell pricing data once a day using a HTTP request node, to your utility’s API endpoint, 2) reformat and push that into the VRM API node (specifically DESS “buyPriceSchedule” and “sellPriceSchedule”) VRM API documentation