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Acrel APM800 Series vs Acrel ADL400

Install fit
Phase support Three-phase three-wire and three-phase four-wire systems. Three-phase three-wire and three-phase four-wire systems.
Installation Indoor 92 x 92 mm panel-mounted multifunction power meter with CT signal inputs. DIN-rail mounted three-phase energy meter; direct and CT wiring variants are documented.
Measurement Three-phase CT-input multifunction power meter for electrical parameters, four-quadrant energy, demand, and power-quality monitoring. Three-phase Modbus energy meter measuring electrical parameters, active/reactive energy, and forward/reverse energy.
Max current Unknown 80 A
Meter fit
Accuracy class APM800 Class 0.5s active power; reactive power Class 2. Active energy Class 0.5; reactive energy Class 2.
Current sensing External CT input: AC 1 A or 5 A secondary; primary current depends on selected CT ratio. Acrel documents 3 x 1(6) A and 3 x 10(80) A input-current variants, with direct-connect and CT wiring examples.
Monitoring
Protocol RS485 Modbus RTU / DLT645; optional Ethernet Modbus TCP on MCE module RS485 Modbus RTU
Local API Yes Yes
Cloud dependency No vendor cloud required for core metering; APM800 supports local RS485 Modbus RTU / DLT645, with optional Ethernet Modbus TCP / HTTP module. No vendor cloud required for core metering; ADL400 exposes local RS485 Modbus RTU for SCADA, EMS, gateways, or automation systems.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Availability Global Acrel product range with official quote/contact route; local distributor availability varies. Global Acrel product range with direct quote/contact routes; local distributor availability and certification context vary by market.
Source check
Last verified Jul 23, 2026 Jul 21, 2026
Product page Official page Official page
Documentation Official docs Official docs