Well the DNOs use them for bad payers/people who are scared of a big quarterly bill so make of that what you will. Assume the tenants are idiots, I've had a few callouts when all the problem has been is they have forgotten to put money on their keys
Ah right. There is a type with a card/key that a landlord can fit if he wants more money from his tenants. I have no idea about the usefulness of the type you're talking about
The cards are coded for the meter, otherwise the tenant could purchase cards from another supplier and the landlord
would not be reimbursed for units used. I have fitted several of late without issues save for the 3 phase meter
that failed to disconnect the power when the credit ran out.
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