How accurate are the meters, and to which standards?
CDM single and three phase meters are Class 1.0 to IEC 62053-21, IEC 60252-11 and GB/T 17215-008, plus PEA and MEA. The EP96 panel meter is Class 0.5S; the accuracy of the whole set also depends on the CTs and wiring.
Do I have to replace my meters?
Apartments and markets move to CDM, because dial meters cannot send data. Factories with panel meters keep them and add an E-Power MiniKit.
Monthly billing or prepaid?
Long-term tenants who pay on time suit monthly billing with remote cut-off for arrears. Rotating or short-term tenants suit prepaid, since they pay before use.
How many meters per gateway?
Max 200, Eco 60, Mini 30. Each RS485 segment takes 30 meters or 600 m before a repeater, and the Mini only serves meters in the same cabinet.
What does IT need to open?
The gateway only connects outward: allow HTTPS 443 (fallback 80), MQTT 21880 and DNS. It uses DHCP or a static IP. The full table is in the CPL Gateway manual.