Who with a commercial gite attached to their property, has a dedicated (separate from house) electricity supply to said gite?
Idly looking for some comments on two tableaux (house and gite) sharing an HC connection from Google AI (byw, does it have a name??), it is quite emphatic that a commercial holiday let gite must have its own electrical supply…
Interesting!
Perhaps your answer from Google is implying that in France one cannot re-sell electricity… which you cannot.
Indeed.
But is renting out a holiday let, that includes electricity, seen as reselling electricity…
My neighbour has two gites, they share the single power cable with her property coming up the chemin on overhead cables.
No. The only potential difficulty is how you handle charging EVs.
We had sub-counters for electricity ( and a separate tableaux) and water for the gite, which we read monthly and were able to give an accurate figure for use, and from that calculated pro-rata amounts for the abonnements. We were regime réel, as are commercial gîtes, so had to use an accountant who was happy with this.
If the set up is sufficient to class as a business then EDF will presumably want to charge a pro tarif, not a particulier tarif as no longer domestic supply.
Adam1, I would be tempted to ask Gemini the question
" In France if you have a gite with a charging point can you charge your guests for electricity?" This will give you a few ideas I think. The at cost part gets quite complex in concept if you have solar panels anyway…whats the cost?
For EVs we have a charger with app that measures usage and a physical tag you need to start charging. A few uses we give gratis for a daily Tesla top up we would preagree the rate and charge.
On our gites apart from EVs we leave energy included in the base rate. If somebody connects a bitcoin mining rig it will likely overload the 12kw supply quite quickly and solve any problems.
We have a separate electricity supply to our gite. One benefit has been that we have a tempo contract for the gite and not our house. All the red days finish by the end of March and our first guests are usually in May. So we get really cheap electricity through our season. 
Why? I know the answer. It is illegal to resell electricity so the sole options is a service charge, which of course is a service so a different tax treatment. Of course in many instances the usage would be quite small so probably not worth the effort and just factor it in to overall pricing. We were in the mountains, and in winter an EV driving to and from ski slopes can be more significant.