★★★★☆ (4/5) – Docked one star for vendor lock-in and non-user-replaceable battery.
If you want open standards, look at Landis+Gyr E650 or Elster A1800 . If you want low-cost C&I with Modbus, consider Accuenergy Acuvim II (not utility grade for billing). ace6000 itron
Disclaimer: Specifications and firmware features vary by utility deployment. This review is based on the reference design and common North American/European configurations. 1. Executive Summary The ACE6000 is not a residential meter. It is Itron’s flagship Class 2000 (2.0S) form factor meter, designed for high-revenue commercial, industrial, and substation metering. It is the successor to the legendary Centron (C2Sd) but built on the OpenWay Riva architecture. ★★★★☆ (4/5) – Docked one star for vendor