Best answer by garystokey
I am on the v2g have been since mid august when I got my new 40kw leaf used to have a 30 kw . so your correct in your thinking when you plug your car in depending on the load on the grid it will start to export from the car to the grid but on average at that time of the day appears to be about 3.4 kw. I can only give my situation. So hope this helps. I get home from work 30 miles per day usually with about 88% charge in the car it starts to export straight away if I check my in house meter it shows zero usage of electric because I believe what's been used for the house is drawn from the car and what's spare is exported to the grid at 30p per kw. Once the charge gets down to your set % set by you on the app the systems stops exporting mine is set at 30% it looks like it then goes into idle mode with nothing in nothing out depending on the load on the grid this is usually about 10.30 in my situation. the charger will then start to charge at 12 o'clock at night until 7 in the morning when the car is 100% charged ready for my journey to work again the time you require the 100% is set in the app.
This is the part that's a bit confusing you receive the V2G credits one month behind. So I have just received my august bill which also includes £75 they pay you to be on the scheme(this was only decided they would pay this after reviews from others on the V2G scheme they also upped the pay back from 23p per kw to the now 30p pkw) and the exported credits are shown on the bill separate but only the amount and nothing about how much exported kw. So for me its all up in the air as to whether I make money on the system or not next months bill will show better for me when I see true cost but first signs are good.
I have had the charger fail twice and it not charged my car so two morning I was at 30% charge still ok for my journey to work the charger corrected its self with a switch off and on and was reported by me to the charger supplier but as you know it a trial so we are the Guinea pig for this and I guess things can go wrong.
hope this helps