Renault have now announced that the Zoe and Kangoo will be available to purchase with the battery.
However Not the Twizy as no body wanted that according to Renault!
There is also no option to switch from Rental to ownership of the battery on either the Zoe or Kangoo.
The Zoe battery is just under £5k more. ie. at a monthly rental of £70 then the same as 6 years.
You loose the Renault ‘safety’ net after the 4 years, but Renault are expecting the batteries to last 10 years.
For me at £45 and a Twizy battery at approx £3000 then 5.5 years to break point. Perhaps after 5-6 years rental Renault could reduce the rental to a more acceptable level.