diff --git a/inverter/api.py b/inverter/api.py
index e4c695a..5afdaf1 100644
--- a/inverter/api.py
+++ b/inverter/api.py
@@ -22,7 +22,6 @@
 from inverter.exceptions import ValidationError
 from inverter.validators import InverterValueValidator
 
-
 logger = logging.getLogger(__name__)
 
 
@@ -159,8 +158,13 @@ def fetch_inverter_versions(
     results = []
     for info in infos:
         print(f'Fetch "{info.name}"', end='...')
-        response: ModbusResponse = inv_sock.read(start_register=info.register, length=1)
+        if info.inverter == 'deye_sg04lp3':
+            response: ModbusResponse = inv_sock.read(start_register=info.register, length=2)
+            version = '-'.join(response.data_hex[i:i + 4] for i in range(0, len(response.data_hex), 4))
+        else:
+            response: ModbusResponse = inv_sock.read(start_register=info.register, length=1)
+            version = Version('.'.join(number for number in response.data_hex))
+
         print(f'Result (in hex): [cyan]{response.data_hex}')
-        version = Version('.'.join(number for number in response.data_hex))
         results.append(InverterRegisterVersionResult(info=info, data_hex=response.data_hex, version=version))
     return results
diff --git a/inverter/cli/cli_app.py b/inverter/cli/cli_app.py
index 8a34d18..1d46e1a 100644
--- a/inverter/cli/cli_app.py
+++ b/inverter/cli/cli_app.py
@@ -533,12 +533,18 @@ def inverter_version(ip, port, verbosity: int):
         except ReadInverterError as err:
             print(f'[red]{err}')
             sys.exit(1)
+        if user_settings.inverter.name == 'deye_sg04lp3':
+            infos = [
+                InverterRegisterVersionInfo(name='MCU1', register=0x000E, inverter='deye_sg04lp3'),
+                InverterRegisterVersionInfo(name='MCU2', register=0x0011, inverter='deye_sg04lp3'),
+            ]
+        else:
+            infos = [
+                InverterRegisterVersionInfo(name='Control Board Firmware', register=0x000D),
+                InverterRegisterVersionInfo(name='Communication Board Firmware', register=0x000E),
+                InverterRegisterVersionInfo(name='Communication Protocol', register=0x0012),
+            ]
 
-        infos = [
-            InverterRegisterVersionInfo(name='Control Board Firmware', register=0x000D),
-            InverterRegisterVersionInfo(name='Communication Board Firmware', register=0x000E),
-            InverterRegisterVersionInfo(name='Communication Protocol', register=0x0012),
-        ]
         results = fetch_inverter_versions(inv_sock=inv_sock, infos=infos)
 
     print_inverter_versions(results)
diff --git a/inverter/data_types.py b/inverter/data_types.py
index 010af2e..de4f5b1 100644
--- a/inverter/data_types.py
+++ b/inverter/data_types.py
@@ -143,6 +143,7 @@ class Validators(msgspec.Struct):
 class InverterRegisterVersionInfo:
     name: str
     register: int
+    inverter: str | None = None
 
 
 @dataclasses.dataclass
diff --git a/inverter/definitions/deye_2mppt_validations.yaml b/inverter/definitions/deye_2mppt_validations.yaml
index 3558a57..4aa7152 100644
--- a/inverter/definitions/deye_2mppt_validations.yaml
+++ b/inverter/definitions/deye_2mppt_validations.yaml
@@ -1,7 +1,7 @@
 validators:
     - name: "Radiator Temperature"
       type: "float"
-      min_value: -9.9
+      min_value: -99.9
       max_value: 100
 
     - name: "Total AC Output Power (Active)"
diff --git a/inverter/utilities/cli.py b/inverter/utilities/cli.py
index efb75c4..d43e196 100644
--- a/inverter/utilities/cli.py
+++ b/inverter/utilities/cli.py
@@ -87,7 +87,7 @@ def print_inverter_versions(results: list[InverterRegisterVersionResult], title=
             hex(result.info.register + offset),  # Address (hex)
             str(result.info.register + offset),  # Address (dec)
             result.data_hex,  # Hex value
-            f'v{result.version}',  # Human readable version
+            f'{result.version}',  # Human readable version
         )
 
     console = get_console()