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Acrel ADL400 vs Acrel ADL200

Install fit
Phase support Three-phase three-wire and three-phase four-wire systems. Single-phase low-voltage AC; official sources specify AC 220 V, 50 Hz.
Installation Indoor 4-module (72 mm) DIN-rail installation by a qualified electrician; the ADL400 family documents direct-connected and external-CT wiring variants. Indoor 2-module (36 mm) DIN35-rail, direct-connected single-phase installation by qualified personnel; 90 x 36 x 65 mm.
Measurement Three-phase 3P3W/3P4W electrical-parameter, 1st-31st harmonic, and bidirectional active/reactive energy measurement over local RS485 Modbus RTU. Single-phase direct-connected measurement of positive/negative active energy and U, I, P, Q, S, PF, frequency and harmonics.
Max current 80 A 80 A
Meter fit
Accuracy class Active energy Class 0.5; reactive energy Class 2; MID/CE listed. Class 1 active energy.
Current sensing Two documented input variants: 3 x 10(80) A and 3 x 1(6) A, with separate direct-connect and external-CT wiring diagrams; confirm the ordered input variant. Direct input, 10 A basic current and 80 A maximum current; no external CTs for this ADL200 direct-connected meter.
Monitoring
Protocol RS485 Modbus RTU RS485 Modbus RTU
Local API Yes Yes
Cloud dependency No vendor cloud required for core metering; ADL400 exposes local RS485 Modbus RTU for SCADA, EMS, gateways, or automation systems. No vendor cloud required. Display, pulse output and metering work locally; the documented RS485 configuration provides local Modbus RTU access.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Availability Global Acrel product range with direct quote/contact routes; local distributor availability and certification context vary by market. Global Acrel quote/distributor market; availability, certification acceptance, MID configuration and ordering vary by country.
Source check
Last verified Sep 5, 2026 Sep 4, 2026
Product page Official page Official page
Documentation Official docs Official docs
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