Another point to consider is myself and other forum members have had to pay for remedial electric work to be done in order for the charger to be installed in the first place. If your electricity supply is not up to the ‘required standard’ for the charger, it is us that end up paying for these works out of our own pocket. Motability only pay for the charger to be installed; they will not pay for these extra expenses.
Also, as I understand, motability will not pay for an e.v chargepoint if you get a hybrid vehicle. They only pay if you get a 100% electric one.
I appreciate my response does not address your initial question, but I just wanted to warn you. I only found out when the e.v man refused to install the charger.
I only mention this as if you are on a tight budget, you may need to save a little extra for this, unless you are lucky enough to live in a very modern house which hopefully will be better equipped for e.v. charging.