Oh no. It definitely appears this is an issue and requires a software fix on E.On’s systems.
I’m assuming that they may be quite a few customers who have a solar setup who own an EV vehicle, so could be more widespread than a couple of cases. If you don’t keep a stringent eye on your bill, there’s not really anyway of knowing if the EV is connected to the correct account to take advantage of the tariff.
The solution appears to be to delink the accounts, and provide separate login credentials for each unique account, that’s certainly worked for me and my latest bill looked correct.
I have questioned why I haven’t received any of the monthly £10 credits as of yet, and was told that you have to fulfil certain criteria on a monthly basis to qualify. Certainly in my instance, it’s not been in anyway my fault I’ve been unable to utilise the features, and infact I would suggest that the case has been valuable for the company as it threw up an issue maybe they hadn’t realised could even occur.
Maybe even as a gesture of good will it would be nice to know that I would still be qualifying for the payments for the last 6 weeks of back and forth communications and in the end coming up with a stop gap solution before maybe a system update.
Will you be able to reclaim any of the extra charges you have incurred? Charging at 25p/kwh vice 6.7p/kwh will have made a big difference. And again, I would suggest that is in no way your fault, but a fault of E.On.
I've been told that E.On
should be able to credit me for the usage originally billed at full rate. For the moment, I'm assuming that 'should' means 'will'!
I, too, have not yet received any of the £10 monthly incentives for signing up. My understanding is that the only requirement for the first one is to link the car to the app. This I did in mid-April. I will not be content if it is not forthcoming.
As you say, there are possibly quite a few customers in the same position. You realised because your normal peak usage is so low. I realised because I download all my meter data and cross-check with the bills. Most customers, I suspect, will not realise. As an aside, on their equivalent tariff Octopus include on their bills the usage and rate applied for each half-hour slot. If E.On did the same this would help all customers check and understand their bills.