diff --git a/homeassistant/components/solax/manifest.json b/homeassistant/components/solax/manifest.json
index d3f677fa894..be81dd65e89 100644
--- a/homeassistant/components/solax/manifest.json
+++ b/homeassistant/components/solax/manifest.json
@@ -6,5 +6,5 @@
   "documentation": "https://www.home-assistant.io/integrations/solax",
   "iot_class": "local_polling",
   "loggers": ["solax"],
-  "requirements": ["solax==0.3.2"]
+  "requirements": ["solax==3.1.0"]
 }
diff --git a/homeassistant/components/solax/sensor.py b/homeassistant/components/solax/sensor.py
index ccd1a8c96c9..a8c09bdc880 100644
--- a/homeassistant/components/solax/sensor.py
+++ b/homeassistant/components/solax/sensor.py
@@ -6,7 +6,7 @@ import asyncio
 from datetime import timedelta
 
 from solax import RealTimeAPI
-from solax.discovery import InverterError
+from solax.inverter import InverterError
 from solax.units import Units
 
 from homeassistant.components.sensor import (
diff --git a/requirements_all.txt b/requirements_all.txt
index 6b71c1e788d..8a35cd7a2ee 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -2581,7 +2581,7 @@ solaredge-local==0.2.3
 solaredge==0.0.2
 
 # homeassistant.components.solax
-solax==0.3.2
+solax==3.1.0
 
 # homeassistant.components.somfy_mylink
 somfy-mylink-synergy==1.0.6
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 6ed14716033..903f14831b3 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -1985,7 +1985,7 @@ soco==0.30.2
 solaredge==0.0.2
 
 # homeassistant.components.solax
-solax==0.3.2
+solax==3.1.0
 
 # homeassistant.components.somfy_mylink
 somfy-mylink-synergy==1.0.6
diff --git a/tests/components/solax/test_config_flow.py b/tests/components/solax/test_config_flow.py
index c671fe39cec..61bd9003439 100644
--- a/tests/components/solax/test_config_flow.py
+++ b/tests/components/solax/test_config_flow.py
@@ -18,7 +18,11 @@ def __mock_real_time_api_success():
 
 def __mock_get_data():
     return InverterResponse(
-        data=None, serial_number="ABCDEFGHIJ", version="2.034.06", type=4
+        data=None,
+        dongle_serial_number="ABCDEFGHIJ",
+        version="2.034.06",
+        type=4,
+        inverter_serial_number="XXXXXXX",
     )