{"id":344,"date":"2025-09-02T10:24:15","date_gmt":"2025-09-02T10:24:15","guid":{"rendered":"https:\/\/docs.qilowatt.eu\/docs\/huawei-sun2000\/"},"modified":"2025-10-30T10:03:32","modified_gmt":"2025-10-30T10:03:32","password":"","slug":"huawei-sun2000","status":"publish","type":"docs","link":"https:\/\/docs.qilowatt.eu\/en\/docs\/huawei-sun2000\/","title":{"rendered":"Huawei SUN2000"},"content":{"rendered":"\n

Introduction<\/h2>\n\n
Huawei SUN2000 inverters can be connected to the Qilowatt system via Modbus communication. This guide describes the required preparations, connections, and settings to ensure proper operation. <\/div>\n\n

Prerequisites<\/h2>\n\n
\u2022 A Qilowatt account has been created and the app is ready for adding devices \u2192 Creating a user account<\/a>\u2022 Inverter, battery, and Smart Dongle firmware are updated\u2022 Smart Dongle removed (it interferes with Modbus communication)\u2022 A Modbus module is available\u2022 Required tools and a communication cable (CAT5 or CAT6)<\/div>\n\n

Step-by-step Guide<\/h2>\n\n

1. Preparation<\/h3>\n\n
\u2022 Update the firmware of the inverter, battery, and Smart Dongle<\/strong> before connecting.\u2022 Remove the Smart Dongle<\/strong>, as it interferes with Modbus communication and control will not work properly.<\/div>\n\n

2. RS485 connections<\/h3>\n\n
\n
Always refer to the installation manual of your specific model.Huawei SUN2000 M1 (10 kW) COM port:<\/strong>\u2022 Pin 1 \u2192 RS485 A1\u2022 Pin 3 \u2192 RS485 B1\u2022 Pin 5 \u2192 GND (maandus)\u2022 Pin 7 \u2192 RS485 A2 (Smart Meter + battery)\u2022 Pin 9 \u2192 RS485 B2 (Smart Meter + battery)\u2022 Pin 13 \u2192 GNDFor Qilowatt connection, use Pin 1 (A)<\/strong> and Pin 3 (B)<\/strong>.<\/div>\n\n\n\n
\"\"<\/div>\n<\/div>\n\n

3. Inverter settings<\/h3>\n\n
\u2022 Modbus address:<\/strong> 1 (default)\u2022 Baud rate:<\/strong> 9600 (default)If necessary, the Modbus address can be changed by Qilowatt support, but this is not required for standard connections.<\/div>\n\n

4. Operating modes<\/h3>\n\n
\u2022 Set the inverter to Self-use<\/strong> mode.\u2022 In the FusionSolar app, disable all TOU (time-of-use) modes<\/strong> to avoid conflicts.<\/div>\n\n

5. Why is a firmware update necessary?<\/h3>\n\n
Qilowatt always uses the manufacturer\u2019s latest Modbus protocol. If the inverter or battery firmware is not updated, control may not work correctly. <\/div>\n\n

Result<\/h2>\n\n
The Huawei SUN2000 inverter is successfully configured and connected to the Qilowatt system. The module transmits data and enables inverter control and energy optimization. <\/div>\n\n

If it Doesn’t Work<\/h2>\n\n
\u2022 If communication fails, check the RS485 connections (Pins 1 and 3 must be used correctly).\u2022 If the device does not respond to commands, ensure that the Smart Dongle has been removed.\u2022 If control does not work, verify the Modbus address and Baud rate values.\u2022 If the issue persists, contact our team: support@qilowatt.eu<\/a>.<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_gspb_post_css":"#gspb_heading-id-gsbp-720b811,#gspb_heading-id-gsbp-deb9024{font-size:var(--wp--preset--font-size--medium)!important}#gspb_heading-id-gsbp-deb9024{margin-top:20px}.gspb_text-id-gsbp-004db6b,.gspb_text-id-gsbp-f2b0ca4{margin-bottom:0!important}#gspb_heading-id-gsbp-0ca7007{font-size:var(--wp--preset--font-size--medium)!important;margin-top:20px}#gspb_heading-id-gsbp-0800f8b,#gspb_heading-id-gsbp-08bb7b2,#gspb_heading-id-gsbp-172aab8,#gspb_heading-id-gsbp-5d22db7,#gspb_heading-id-gsbp-5f4f97d{font-size:18px;margin-top:20px;margin-bottom:10px}#gspb_image-id-gsbp-f15cb81 img{vertical-align:top;display:inline-block;box-sizing:border-box;max-width:100%;height:auto}#gspb_heading-id-gsbp-77ad4c8,#gspb_heading-id-gsbp-ee891d3{font-size:var(--wp--preset--font-size--medium)!important;margin-top:20px}","footnotes":""},"doc_category":[190,145],"doc_tag":[128,152,139,146,127,126,133],"class_list":["post-344","docs","type-docs","status-publish","hentry","doc_category-3-inverter-installation-pick-the-right-one","doc_category-inverter-installation","doc_tag-connection","doc_tag-huawei","doc_tag-installation","doc_tag-inverter","doc_tag-modbus-r1","doc_tag-modbus-r2","doc_tag-setup"],"blocksy_meta":[],"year_month":"2026-04","word_count":313,"total_views":0,"reactions":{"happy":0,"normal":0,"sad":0},"author_info":{"name":"Qilowatt Support","author_nicename":"birgit-ertelqilowatt-eu","author_url":"https:\/\/docs.qilowatt.eu\/en\/author\/birgit-ertelqilowatt-eu\/"},"doc_category_info":[{"term_name":"3. Inverter Installation - pick the right one","term_url":"https:\/\/docs.qilowatt.eu\/en\/dcategory\/3-inverter-installation-pick-the-right-one\/"},{"term_name":"Inverter installation","term_url":"https:\/\/docs.qilowatt.eu\/en\/dcategory\/inverter-installation\/"}],"doc_tag_info":[{"term_name":"connection","term_url":"https:\/\/docs.qilowatt.eu\/en\/dtag\/connection\/"},{"term_name":"huawei","term_url":"https:\/\/docs.qilowatt.eu\/en\/dtag\/huawei\/"},{"term_name":"installation","term_url":"https:\/\/docs.qilowatt.eu\/en\/dtag\/installation\/"},{"term_name":"inverter","term_url":"https:\/\/docs.qilowatt.eu\/en\/dtag\/inverter\/"},{"term_name":"modbus R1","term_url":"https:\/\/docs.qilowatt.eu\/en\/dtag\/modbus-r1\/"},{"term_name":"modbus R2","term_url":"https:\/\/docs.qilowatt.eu\/en\/dtag\/modbus-r2\/"},{"term_name":"setup","term_url":"https:\/\/docs.qilowatt.eu\/en\/dtag\/setup\/"}],"_links":{"self":[{"href":"https:\/\/docs.qilowatt.eu\/en\/wp-json\/wp\/v2\/docs\/344","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/docs.qilowatt.eu\/en\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/docs.qilowatt.eu\/en\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/docs.qilowatt.eu\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.qilowatt.eu\/en\/wp-json\/wp\/v2\/comments?post=344"}],"version-history":[{"count":1,"href":"https:\/\/docs.qilowatt.eu\/en\/wp-json\/wp\/v2\/docs\/344\/revisions"}],"predecessor-version":[{"id":345,"href":"https:\/\/docs.qilowatt.eu\/en\/wp-json\/wp\/v2\/docs\/344\/revisions\/345"}],"wp:attachment":[{"href":"https:\/\/docs.qilowatt.eu\/en\/wp-json\/wp\/v2\/media?parent=344"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/docs.qilowatt.eu\/en\/wp-json\/wp\/v2\/doc_category?post=344"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/docs.qilowatt.eu\/en\/wp-json\/wp\/v2\/doc_tag?post=344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}