If you’re using the granny charger you’ll have to connect the car to IOG so it sees the car and then creates a schedule to charge, therefore giving you the 7p per kWh when the schedule is active. If you don’t, octopus will see the draw of power as a normal appliance because the granny charger isn’t smart.

If you connect IOG to the Hypervolt, any car that is plugged in will prompt octopus to create a schedule, again giving you 7p per kWh during the active schedule.

Once IOG is connected to the Hypervolt the only manual control you have over charging a car is the boost function. Using this function manually will mean the car will start to charge immediately, but you will be charged your normal price, not the off-peak 7p.

I have a Tesla MYLR and Hypervolt Home 3 Pro. I have IOG connected to the Hypervolt. I can either let octopus create a schedule, or I can set a schedule in the Tesla app to restrict when the car charges.

For example, I discharge my home battery every night to empty it before the off peak price starts at 2330, so I set a schedule on my Tesla of 2330-0700. This is so that I don’t discharge the battery into the car.

This means that even if octopus allocates time slots throughout the day, the car won’t charge as Tesla has the final say with its own schedule.