[modbus.ankersolix] Initial contribution of Anker SOLIX binding

CODEOWNERS

@@ -252,6 +252,7 @@
 /bundles/org.openhab.binding.millheat/ @seime
 /bundles/org.openhab.binding.minecraft/ @ibaton
 /bundles/org.openhab.binding.modbus/ @ssalonen
+/bundles/org.openhab.binding.modbus.ankersolix/ @evorg
 /bundles/org.openhab.binding.modbus.e3dc/ @weymann
 /bundles/org.openhab.binding.modbus.foxinverter/ @holgerfriedrich
 /bundles/org.openhab.binding.modbus.helioseasycontrols/ @bern77

bom/openhab-addons/pom.xml

@@ -1246,6 +1246,11 @@
       <artifactId>org.openhab.binding.modbus</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>org.openhab.addons.bundles</groupId>
+      <artifactId>org.openhab.binding.modbus.ankersolix</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>org.openhab.addons.bundles</groupId>
       <artifactId>org.openhab.binding.modbus.e3dc</artifactId>

bundles/org.openhab.binding.modbus.ankersolix/AGENTS.md

@@ -0,0 +1,11 @@
+# Anker SOLIX Binding Development Guide
+
+- This is a Modbus sub-binding and depends on the parent Modbus binding.
+- Use Java 21 for builds and tests.
+- Keep register mappings, channel metadata, README documentation, and tests synchronized.
+- Protocol-sync provenance is documented in `DEVELOPERS.md`.
+- Treat optional capability registers as optional: a failed read must not take the Thing offline.
+- Preserve fail-open behavior when device capability cannot be determined.
+- Validate capability-dependent commands before writing to the device.
+- Run the binding-scoped Maven test command before completing changes:
+  `./mvnw -f bundles/pom.xml -pl org.openhab.binding.modbus.ankersolix -Dspotbugs.skip=true test`

bundles/org.openhab.binding.modbus.ankersolix/DEVELOPERS.md

@@ -0,0 +1,19 @@
+# For Developers
+
+## Protocol Baseline Provenance
+
+This file tracks protocol-sync provenance for maintainers.
+The binding's register mapping and command constraints are validated against a versioned external reference snapshot.
+
+| Field | Value |
+| ------------ | ------------- |
+| External reference repository | [anker-charging/ha-anker-solix-official](https://github.com/anker-charging/ha-anker-solix-official) |
+| Repository status | Vendor-maintained official Anker SOLIX integration repository |
+| Reference snapshot tag | `v1.4.3` |
+| Reference snapshot commit | `a6c82f5e2c76491030c239c9e4b5cb5dbda2ad56` |
+| Last sync review date | `2026-08-21` |
+| Sync scope | Register map semantics, capability negotiation, and command constraints only (no runtime dependency). |
+
+## Notes
+
+This note is for maintainers and contributors tracking protocol parity and provenance.

bundles/org.openhab.binding.modbus.ankersolix/NOTICE

@@ -0,0 +1,13 @@
+This content is produced and maintained by the openHAB project.
+
+* Project home: https://www.openhab.org
+
+== Declared Project Licenses
+
+This program and the accompanying materials are made available under the terms
+of the Eclipse Public License 2.0 which is available at
+https://www.eclipse.org/legal/epl-2.0/.
+
+== Source Code
+
+https://github.com/openhab/openhab-core

bundles/org.openhab.binding.modbus.ankersolix/pom.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.openhab.addons.bundles</groupId>
+    <artifactId>org.openhab.addons.reactor.bundles</artifactId>
+    <version>5.3.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>org.openhab.binding.modbus.ankersolix</artifactId>
+
+  <name>openHAB Add-ons :: Bundles :: Modbus AnkerSolix Binding</name>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.openhab.addons.bundles</groupId>
+      <artifactId>org.openhab.binding.modbus</artifactId>
+      <version>${project.version}</version>
+      <scope>provided</scope>
+    </dependency>
+  </dependencies>
+
+</project>