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Refoss Open API Smart Energy Monitor EM16P vs ABB B23 112-100

Energy Meter

Refoss Open API Smart Energy Monitor EM16P

Refoss EM16P

Energy Meter

ABB B23 112-100

Decision point	Refoss Open API Smart Energy Monitor EM16P	ABB B23 112-100

Install fit
Phase support	Single-phase 2-wire, split-phase 3-wire, and 3-phase 4-wire Wye systems with grounded neutral; not for Delta systems.	Three-phase 3-wire and 4-wire systems; nominal 3 x 230/400 V AC.
Installation	Indoor electrical-panel CT installation with clamp-on main and branch-circuit sensors.	Indoor 4-DIN DIN-rail direct-connected three-phase energy meter for distribution boards and small enclosures.
Measurement	CT-based whole-home and circuit-level energy monitor with consumption, feed-in, voltage, current, power, power factor, and energy statistics.	Direct-connected three-phase active-energy meter with RS485 Modbus RTU / EQ Bus and pulse or alarm output.
Max current	200 A	65 A
Meter fit
Accuracy class	+/-2% measurement accuracy	Active energy Class B / Class 1.
Current sensing	2 main CT sensors up to 200 A each plus 16 branch-circuit CT sensors up to 60 A each.	Direct-connected three-phase meter; B23 direct connection up to 65 A, no external CTs for B23 112-100.
Monitoring
Protocol	Wi-Fi / local Web UI / Refoss Open API / MQTT / Home Assistant	Modbus RTU
Local API	Yes	Yes
Cloud dependency	Cloud optional; offline local Web, Open API and MQTT work without app or registration. Refoss cloud is used for remote charts and long-term history.	No ABB cloud required for core metering; B23 112-100 exposes local RS485 Modbus RTU / EQ Bus data when connected to compatible equipment.
Home Assistant	Yes	Yes
Solar fit
Solar import/export	Yes	Yes
Buying context
Price range	Unknown	About $150-$300
Availability	United States and Canada through Refoss official online store; broader availability depends on regional store and reseller channels.	ABB global product and distributor channels; MID/IEC availability and local stock vary by country.
Source check
Last verified	Aug 31, 2026	Jul 17, 2026
Product page	Official page	Official page
Documentation	Official docs	Official docs