diff --git a/homeassistant/components/enphase_envoy/strings.json b/homeassistant/components/enphase_envoy/strings.json
index b42f6bfb50f..822ee14fc9e 100644
--- a/homeassistant/components/enphase_envoy/strings.json
+++ b/homeassistant/components/enphase_envoy/strings.json
@@ -3,6 +3,7 @@
     "flow_title": "{serial} ({host})",
     "step": {
       "user": {
+        "description": "For newer models, enter username `envoy` without a password. For older models, enter username `installer` without a password. For all other models, enter a valid username and password.",
         "data": {
           "host": "[%key:common::config_flow::data::host%]",
           "username": "[%key:common::config_flow::data::username%]",
diff --git a/homeassistant/components/enphase_envoy/translations/en.json b/homeassistant/components/enphase_envoy/translations/en.json
index 2cdb75a6b53..5d4617ed9fa 100644
--- a/homeassistant/components/enphase_envoy/translations/en.json
+++ b/homeassistant/components/enphase_envoy/translations/en.json
@@ -16,7 +16,8 @@
                     "host": "Host",
                     "password": "Password",
                     "username": "Username"
-                }
+                },
+                "description": "For newer models, enter username `envoy` without a password. For older models, enter username `installer` without a password. For all other models, enter a valid username and password."
             }
         }
     }