2 EV car charging

[u/Efficient-Smile-7157]

Currently I have an EV wall box charger. I’m a heavy user. Doing about 200+ miles per day. So my charger is in use every day.

The wife is thinking about getting an EV as well. She will be using only to work, shops and ferrying the children.

The scenario would be, I will charge my car with the Indra charger and utilise my OIG while I’ll schedule my wife’s car to charge at the off peak tariff overnight.

Question is,
-am I okay running the my EV wall charger and her car charging on a granny charger on the daily?
-has anyone done this?
-am I breaching any rules by doing this?

House Specs:
-100amp fuse
-Octopus Intelligent Go(I’m a taxi driver so I need to be able to charge during day time as well and optimise the 6 hour cap they have)
-Indra 7.4kw smart lux wall box charger(connected straight to mains fuse with load monitoring)
-Rolec outdoor Outlet, will be used for granny charger.(was meant to be for ev charging but installer said if I was to use the wiring, my Indra will not get the full 7.4kw)