diff --git a/homeassistant/components/zeversolar/diagnostics.py b/homeassistant/components/zeversolar/diagnostics.py
index b8901a7e793..6e6ed262f51 100644
--- a/homeassistant/components/zeversolar/diagnostics.py
+++ b/homeassistant/components/zeversolar/diagnostics.py
@@ -31,6 +31,7 @@ async def async_get_config_entry_diagnostics(
         "num_inverters": data.num_inverters,
         "serial_number": data.serial_number,
         "pac": data.pac,
+        "energy_today": data.energy_today,
         "status": data.status.value,
         "meter_status": data.meter_status.value,
     }
diff --git a/tests/components/zeversolar/snapshots/test_diagnostics.ambr b/tests/components/zeversolar/snapshots/test_diagnostics.ambr
index eebc8468076..4090a3262ba 100644
--- a/tests/components/zeversolar/snapshots/test_diagnostics.ambr
+++ b/tests/components/zeversolar/snapshots/test_diagnostics.ambr
@@ -10,6 +10,7 @@
 # name: test_entry_diagnostics
   dict({
     'communication_status': 'OK',
+    'energy_today': 123.4,
     'hardware_version': 'M10',
     'meter_status': 'OK',
     'num_inverters': 1,