Energy Meter GoodWe GMK140 RS485 / Modbus RTU

GoodWe Smart Meter GMK140

A GoodWe-native residential smart meter for split-phase and single-phase solar homes that want cleaner import/export visibility and tighter fit with GoodWe inverters and storage workflows.

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Why it stands out

GoodWe positions the GMK140 as the residential smart meter companion for its North America inverter lineup, especially where split-phase or single-phase homes need cleaner demand, import/export, and load visibility.

Best fit

This meter makes the most sense in a GoodWe-led solar or storage setup where the installer wants a DIN-rail meter with included CTs, RS485 wiring, and export-limit support rather than a standalone app-first home monitor.

Watch-outs

It is built around the GoodWe ecosystem rather than open local software workflows, so buyers who mainly want Home Assistant-first or brand-agnostic local monitoring may prefer a different meter family.

Product Images

Gallery, diagrams, and supporting visuals.

GoodWe Smart Meter GMK140 official front render — Official GoodWe front render for the GMK140 residential smart meter.

GoodWe Smart Meter GMK140 official angled render — Official GoodWe angled render for the GMK140 residential smart meter.

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Phase support: 1P2W / 1P3W
Installation: DIN-rail mounted residential smart meter with included current transformers
Measurement: CT-based single-phase / split-phase smart meter for PV consumption, load, and export-power monitoring
Max current: 200 A
Accuracy class: Class 0.5 (voltage/current and active energy) / Class 1 (reactive energy)
Current sensing: 4 x 200A:50mA current transformers included
Local API: No
Cloud dependency: GoodWe SEMS and compatible GoodWe inverter workflows are typically used for normal monitoring, export-power limiting, and household load visibility.
Home Assistant: No
Solar import/export: Yes
Availability: North America official page / GoodWe residential ecosystem availability varies by market

Last verified: May 19, 2026
Product page: Official page
Documentation: Official docs
Notes: Verified on 2026-05-19 against GoodWe's official GMK140 North America product page, the current GMK140 datasheet dated 2025-12-19, and the current GMK120 / GMK140 / GM330 Quick Installation Guide V1.2 dated 2024-02-25. The reviewed official source set confirms GMK140 as a residential smart meter for single-phase and split-phase grid types, with 4 included 200A:50mA CTs, RS485 communication, DIN-rail installation, Class 0.5 voltage/current and active-energy accuracy, Class 1 reactive-energy accuracy, and GoodWe-oriented export-power-limit plus load-monitoring use.