email received from Affect Energy 8/3/18:
Thanks for your email.
Regarding economy 10 meters, we do support them but only on a totalised tariff.
Customer Service Executive
and follow-up 21/3/18:
We do not fit Economy 10 meters as we do not support them. If a customer has an Economy 10 meter, we are happy to supply but as a single rate.
We do not take on customers with Complex 3 rate meters, however we do support Economy 7.
I hope this is helpful.