It is likely that you currently possess historical charging data, which will assist you in determining the cost-effectiveness of a ‘intelligent’ EVSE. On Intelligent Octopus Go, I am charged 6.9p per kWh during off-peak hours and 30.46p per kWh during peak hours, in addition to a standing fee.
The economical rate is a fixed period from 23:30 to 05:30, and extends from 23:30 until 11:00 the following day for electric vehicle charging. Electricity is available at a reduced rate for the entire residence during the designated period, in addition to any charging intervals assigned to me between 05:30 and 11:00.
EV charging stations are assigned dynamically by Octopus, and their allocation may vary based on load and consumption. In my situation, my electric vehicle lacks integration with IOG, so I utilise an Ohme Home Pro EVSE, which does have that capability, and it is the Ohme that manages the charging sessions.
If you can determine your ratio of low-cost to peak charging, you will be able to contrast it with a conventional, fixed-time, overnight tariff.
Approximately 52% of my appliance electricity usage can be rescheduled to the overnight period (such as the dishwasher and washing machine) or involves electric vehicle charging during off-peak hours designated by Octopus. I rarely need to charge the electric vehicle unexpectedly during peak pricing hours, although I frequently connect it during the day to prepare for the following day and receive daytime slots assigned by Octopus.
Utilising a 'intelligent' EVSE such as the Ohme, in conjunction with the IOG tariff, is beneficial for us, although we represent a particular scenario. It may not be effective for all individuals. However, keep in mind that despite lacking an immersion heater, tumble dryer, batteries, or underfloor electric heating, it has still proven to be economical for us. We are still evaluating home batteries, as the point of financial equilibrium would occur approximately between 5 to 6 years.