We have a group of multiple houses, in the UK, with a single charging station (a Rolec EV Basic Charge 7.2kW:
That station doesn’t seem to have any smart component to keep track of its consumption. It’s all plugged on a shared electric meter for which we pay the bill as a group of home owners. This means that if some of us are using the charging station it will inflate the bill but we can’t know who used what and produce a fair split.
Any idea how we could do to measure what is every individual consuming? Maybe the RolecEV can be retrofitted with a smart meter somehow? Or using cables with integrated meters?
If that’s the case (maybe contact Rolec to be sure?), you’re looking at “honor system” or replacing the unit with one that tracks usage. There are options for replacements, but all will cost money and require an electrician.
Most EVs will give you an idea of how much charge a session takes, but it might take a little “math” to calculate if the car doesn’t report it. Even a rough estimate (percentage charged vs. battery capacity) is better than nothing.
But the “honor system” requires you to at least trust the other EV owners to keep track accurately. If you think they may not be diligent (or worse, honest); replace the unit.