HomeWizard P1 'import' to toggle EV Charger switch

Hello, I’ve enabled my HomeWizard P1 meter and can measure import/import, but now I want to toggle the charger of my EV so it’s only ‘ON’ when (1) there’s Sun (= net export) and (2) there are no other high-power appliances taking power (= import lower then export?). It’s not clear how to automate this, as I don’t know if the export should be using ’ - ’ (as if negative import) or ’ + '.
All advise is welcomed.

FYI: I’m working in a Belgian, Flemisch energy landscape, so maybe other automations with the P1 are useful? Do inspire me :wink:

Highly appreciated,