I often use the Tesla superchargers when charging the Funky Cat, as they are often significantly cheaper than other public chargers.
For example the Gridserve chargers often charge around 85p kW, however the Tesla chargers are not only cheaper at peak times, but much cheaper off-peak. It does vary, but at the time of writing the Tesla superchargers at Cribbs Causeway in Bristol are 56p from 9am to 8pm, 37p from 8pm to midnight and for the rest of time they are just 32p.
To put that in perspective, charging my Funky Cat and putting a big charge of 32Kw into the car could cost £27.20 from Gridserve, but if I put the charge before 9am at Cribbs on the Tesla chargers, then the cost would be £10.24. That is a big difference.
I decided to head to Cribbs and use the cheaper rate for charging by Tesla. I arrived with about five minutes to spare. This doesn’t matter as the rate you pay is the rate at the point you start charging.
However, the first charger I used, did not work. I have had this issue before with some Tesla chargers. I tried starting the charge again, once more no luck. I then needed to unlock the charging pin, move the car to a different chargers and try again. By the time I moved the car, it was now past 9am, so, I had to pay the higher rate. The difference was that my 33.9Kw charge cost me £18.63, but if I had managed to get the charge going at the cheaper rate then it would have been £12.54, a saving of just over £6.
I think the next time I try this, I need to get there at least fifteen minutes before the charging window changes so I have time to move the car if I need to.