@@ -609,6 +609,8 @@ def initialize(self, ge_cloud_direct, api_key, automatic, automatic_evc=False, e
         self.ems_slot_warned = set()
         # (device, key) registers whose option validation text could not be parsed, so the warning is logged once
         self.validation_parse_warned = set()
+        # Hybrid model names whose inverter rating could not be parsed, so the fallback warning is logged once
+        self.model_rate_warned = set()
         self.devices_dict = {}
         self.device_list = []
         self.ems_device = None
@@ -910,6 +912,8 @@ def get_max_inverter_rate_from_model(self, model, max_charge_rate=None):
         - GIV-HY3.6         - 3.6kW inverter
         - GIV-HY5.0         - 5.0kW inverter
         - GIV-HY-8.0-G3-HV. - 8kW inverter
+        - GIV-3HY-11        - 11kW 3-phase hybrid (integer rating as its own segment after 3HY)
+        - GIV-AIO-GW2       - Gateway variant, the trailing 2 is not a rating
         - Plant EMS   - Not an inverter, should use the individual inverter values
         """
 
@@ -922,6 +926,17 @@ def get_max_inverter_rate_from_model(self, model, max_charge_rate=None):
                 return max_inverter_rate
             except ValueError:
                 pass
+
+        # Integer rating only as a whole segment straight after the 3-phase hybrid token (GIV-3HY-11),
+        # bounded by '-' or end of string so suffixes such as GW2 / G3 are never read as a rating
+        match = re.search(r"(?:^|-)3HY-(\d{1,2})(?=-|$)", model, re.IGNORECASE)
+        if match:
+            return int(match.group(1)) * 1000
+
+        # A hybrid with no parseable rating is using a battery rate as its AC rating, warn once per model
+        if "HY" in model.upper() and model not in self.model_rate_warned:
+            self.log("GECloud: Warn: Unable to determine inverter rating from model '{}', using max charge rate {}W instead - set inverter_limit in apps.yaml if this is wrong".format(model, max_charge_rate))
+            self.model_rate_warned.add(model)
         return max_charge_rate
 
     async def publish_account(self, account):
 
@@ -75,6 +75,7 @@ def __init__(self):
         self.gateway_device = None
         self.ems_slot_warned = set()
         self.validation_parse_warned = set()
+        self.model_rate_warned = set()
         self._discovery_report = None
         self._now_utc_exact = datetime.now(timezone.utc)
         self.settings_from_cache = False
@@ -7521,6 +7522,16 @@ def _test_get_max_inverter_rate_from_model(my_predbat):
         ("Plant EMS", None, None, "Plant EMS => None (no number)"),
         # No number, but max_charge_rate provided as fallback
         ("Gateway", 2600, 2600, "Gateway => fallback to max_charge_rate"),
+        # 3-phase hybrid carries an integer rating as its own segment after 3HY (GH#5136)
+        ("GIV-3HY-11", 9984, 11000, "GIV-3HY-11 => 11kW, not the 9984W battery rate"),
+        ("GIV-3HY-8", 7987, 8000, "GIV-3HY-8 => 8kW"),
+        ("giv-3hy-5", 4000, 5000, "giv-3hy-5 => 5kW (case-insensitive)"),
+        # Integer suffixes that are not ratings keep the fallback
+        ("GIV-AIO-GW2", 2600, 2600, "GIV-AIO-GW2 => fallback, GW2 is not a rating"),
+        ("GIV-3HY-G3", 9984, 9984, "GIV-3HY-G3 => fallback, G3 is not a rating"),
+        ("GIV-3HY-110", 9984, 9984, "GIV-3HY-110 => fallback, three digits is not a plausible rating"),
+        # Decimal pass still wins over the 3HY integer pass
+        ("ALPS HY-6.0-GL", 3600, 6000, "ALPS HY-6.0-GL => 6kW"),
     ]
 
     failed = 0
@@ -7533,6 +7544,20 @@ def _test_get_max_inverter_rate_from_model(my_predbat):
         else:
             print("OK {}: got {}".format(description, result))
 
+    # A hybrid model that cannot be parsed warns once per model, non-hybrids stay silent
+    ge_cloud.model_rate_warned = set()
+    ge_cloud.log_messages = []
+    ge_cloud.get_max_inverter_rate_from_model("GIV-HYX", 2600)
+    ge_cloud.get_max_inverter_rate_from_model("GIV-HYX", 2600)
+    ge_cloud.get_max_inverter_rate_from_model("Gateway", 2600)
+    ge_cloud.get_max_inverter_rate_from_model("GIV-3HY-11", 9984)
+    warnings = [message for message in ge_cloud.log_messages if "Unable to determine inverter rating" in message]
+    if len(warnings) != 1 or "GIV-HYX" not in warnings[0]:
+        print("ERROR expected exactly one fallback warning naming GIV-HYX, got {}".format(warnings))
+        failed += 1
+    else:
+        print("OK unparsed hybrid model warns once")
+
     return 1 if failed else 0