Solutions — Electricity smart meters (Chain2)
Chain2 data from second-generation electricity meters
EnerSync receives Chain2 frames from the gateway on the 2G meter and turns them into 15-minute curves, per-band closings, instantaneous power and events, with a quality label on every sample.
01 — What it solves
The distributor's data, from the meter
Per-band closings from the meter
Daily and monthly closings with the six F1–F6 bands as the meter computes them, not rebuilt from the curve. Withdrawal and production kept apart.
Quality on every sample
Every quarter hour is marked real, recovered or interpolated. A lost packet is recovered exactly from the next frame; a long gap stays a gap.
Instantaneous power, not just averages
Power changes beyond the threshold become a dedicated series, far finer than the 15-minute average.
02 — How it works
How Chain2 works
01
Gateway on the meter
A Chain2Gate plugged into the 2G meter socket receives Chain2 frames over powerline (CEI TS 13-82/13-83).
02
MQTT with certificates
The gateway publishes to an MQTT broker over mutual TLS; the platform connects with the customer certificate.
03
Frame decoding
Curves, closings, voltage statistics, nameplate and events are typed frames: each goes to its series, with the CT constant applied at read time.
04
Dashboard and API
Readings per partition, power, events and gateway telemetry in the dashboard and through the API.
03 — Specifications
Under the hood
- Gateway
- MAC srl Chain2Gate PLUG Red Edition, MQTT mutual TLS
- Frames
- CF1–CF51 and CF101/CF103: 15-min curves, daily/monthly closings, voltage quality, nameplate, events
- Data
- Wh/W/VARh/V already scaled by the meter; F1–F6 bands; real/recovered/interpolated quality; power series
- Integration
- REST API /v1/chain2: devices, readings per partition, power, events, telemetry
04 — Regulation and obligations
The right to use your own meter's data
ARERA, Resolution 87/2016/R/eel
Functional specifications of 2G meters: they provide the channel towards user devices (Chain2) with 15-minute withdrawal and production data and per-band closings.
CEI TS 13-82 and CEI TS 13-83
Technical specifications of the Chain2 channel and of user devices: the certified gateway speaks this protocol, the platform decodes the frames as the standard defines them.
Directive (EU) 2019/944, arts. 20–23
The final customer is entitled to their metering data, including near real time through a standard interface: Chain2 is that interface in Italy.
ARERA, Resolution 727/2022/R/eel — TIAD
In energy communities shared energy comes from the hourly data of 2G meters: having the same curve as the distributor, with per-sample quality, avoids surprises at settlement.
Indicative references, current at publication date: they do not replace a regulatory check for your case.
05 — Frequently asked questions
Frequently asked questions on Chain2
How is a POD with several meters handled?
Each meter (M1 withdrawal, M2 production) is its own device; the unified per-POD view is a read-time grouping, without merging the data.
Can I see the plant production as well?
Yes: the CF101/CF103 frames of the production meter (M2) feed their own curve, separate from withdrawal.
What if the gateway loses packets?
Every frame also carries the previous quarter, so a single lost packet is recovered exactly. Longer gaps are interpolated up to 4 hours; beyond that the gap stays visible.
Can I export in my system format?
The REST API returns curves, closings and events as JSON with per-tenant tokens; a dedicated exporter exists for the legacy system.