diff --git a/.changeset/large-apricots-kiss.md b/.changeset/large-apricots-kiss.md
new file mode 100644
index 000000000..e128cdcfd
--- /dev/null
+++ b/.changeset/large-apricots-kiss.md
@@ -0,0 +1,5 @@
+---
+'@lion/form-core': patch
+---
+
+Do a deep equals check for choice group children that have complex modelValues, enabling modelValue setter to work on the group level.
diff --git a/packages/form-core/src/choice-group/ChoiceGroupMixin.js b/packages/form-core/src/choice-group/ChoiceGroupMixin.js
index 98a6d1702..d609370de 100644
--- a/packages/form-core/src/choice-group/ChoiceGroupMixin.js
+++ b/packages/form-core/src/choice-group/ChoiceGroupMixin.js
@@ -44,7 +44,12 @@ const ChoiceGroupMixinImplementation = superclass =>
        * @param {ChoiceInputHost} el
        * @param {any} val
        */
-      const checkCondition = (el, val) => el.choiceValue === val;
+      const checkCondition = (el, val) => {
+        if (typeof el.choiceValue === 'object') {
+          return JSON.stringify(el.choiceValue) === JSON.stringify(value);
+        }
+        return el.choiceValue === val;
+      };
 
       if (this.__isInitialModelValue) {
         this.__isInitialModelValue = false;
@@ -281,7 +286,16 @@ const ChoiceGroupMixinImplementation = superclass =>
     _setCheckedElements(value, check) {
       for (let i = 0; i < this.formElements.length; i += 1) {
         if (this.multipleChoice) {
-          this.formElements[i].checked = value.includes(this.formElements[i].value);
+          let valueIsIncluded = value.includes(this.formElements[i].modelValue.value);
+
+          // For complex values, do a JSON Stringified includes check, because [{ v: 'foo'}].includes({ v: 'foo' }) => false
+          if (typeof this.formElements[i].modelValue.value === 'object') {
+            valueIsIncluded = /** @type {any[]} */ (value)
+              .map(/** @param {Object} v */ v => JSON.stringify(v))
+              .includes(JSON.stringify(this.formElements[i].modelValue.value));
+          }
+
+          this.formElements[i].checked = valueIsIncluded;
         } else if (check(this.formElements[i], value)) {
           // Allows checking against custom values e.g. formattedValue or serializedValue
           this.formElements[i].checked = true;
diff --git a/packages/form-core/test-suites/choice-group/ChoiceGroupMixin.suite.js b/packages/form-core/test-suites/choice-group/ChoiceGroupMixin.suite.js
index a53ade6fe..5f0364c53 100644
--- a/packages/form-core/test-suites/choice-group/ChoiceGroupMixin.suite.js
+++ b/packages/form-core/test-suites/choice-group/ChoiceGroupMixin.suite.js
@@ -286,7 +286,7 @@ export function runChoiceGroupMixinSuite({ parentTagString, childTagString, choi
       }
     });
 
-    it('can check a radio by supplying an available modelValue', async () => {
+    it('can check a choice by supplying an available modelValue', async () => {
       const el = /** @type {ChoiceInputGroup} */ (await fixture(html`
         <${parentTag} name="gender[]">
           <${childTag}
@@ -310,6 +310,35 @@ export function runChoiceGroupMixinSuite({ parentTagString, childTagString, choi
       expect(el.formElements[2].checked).to.be.true;
     });
 
+    it('can check a choice by supplying an available modelValue even if this modelValue is an array or object', async () => {
+      const el = /** @type {ChoiceInputGroup} */ (await fixture(html`
+        <${parentTag} name="gender[]">
+          <${childTag}
+            .modelValue="${{ value: { v: 'male' }, checked: false }}"
+          ></${childTag}>
+          <${childTag}
+            .modelValue="${{ value: { v: 'female' }, checked: true }}"
+          ></${childTag}>
+          <${childTag}
+            .modelValue="${{ value: { v: 'other' }, checked: false }}"
+          ></${childTag}>
+        </${parentTag}>
+      `));
+
+      if (cfg.choiceType === 'single') {
+        expect(el.modelValue).to.eql({ v: 'female' });
+      } else {
+        expect(el.modelValue).to.deep.equal([{ v: 'female' }]);
+      }
+
+      if (cfg.choiceType === 'single') {
+        el.modelValue = { v: 'other' };
+      } else {
+        el.modelValue = [{ v: 'other' }];
+      }
+      expect(el.formElements[2].checked).to.be.true;
+    });
+
     it('expect child nodes to only fire one model-value-changed event per instance', async () => {
       let counter = 0;
       const el = /** @type {ChoiceInputGroup} */ (await fixture(html`