How often to I have to send meter readings
It is best you send them in when you get the email request from Bulb (monthly) If you do not send in within that time frame they will use estimates which can be way out.
They do say every 3 months as a requirement but they will then be using estimates. To be honest if you dont send them in for 6 months I doubt if they will complain but your bills are likely to be over estimated.
are likely to be over estimated.
Just a likely to be underestimated, which is potentially worse.
@Mermaid48 you should submit your meter readings monthly 1-2 days before your statement date, as requested by Bulb in the reminder emails that are sent out.