diff --git a/solaredge_modbus_mqtt/__init__.py b/solaredge_modbus_mqtt/__init__.py
index baadf19..19750e4 100644
--- a/solaredge_modbus_mqtt/__init__.py
+++ b/solaredge_modbus_mqtt/__init__.py
@@ -469,7 +469,8 @@ class SolarData:
                 value = value * math.pow(10, scale)
 
             if 'bit' in config:
-                value = bool(value & config['bit'])
+                # integer, not boolean: Grafana's InfluxQL time series drops booleans
+                value = int(bool(value & config['bit']))
 
             if 'map' in config:
                 value = config['map'][value] if 0 <= value < len(config['map']) else 'Unknown ({0})'.format(value)
diff --git a/solaredge_modbus_mqtt/test_SolarData.py b/solaredge_modbus_mqtt/test_SolarData.py
index aa6be67..3201fb5 100644
--- a/solaredge_modbus_mqtt/test_SolarData.py
+++ b/solaredge_modbus_mqtt/test_SolarData.py
@@ -138,8 +138,8 @@ class TestSolarData(unittest.TestCase):
         self.assertIs(False, inverter._decode_value(decoder, 1, registerDataType.INT16, int))
 
     def testOffgrid(self):
-        self.assertIs(False, SolarData(probe_data()).data['offgrid'])
-        self.assertIs(True, SolarData(probe_data(event_1_vendor=5)).data['offgrid'])
+        self.assertEqual(0, SolarData(probe_data()).data['offgrid'])
+        self.assertEqual(1, SolarData(probe_data(event_1_vendor=5)).data['offgrid'])
 
     def testMeter(self):
         solarData = SolarData(probe_data())
@@ -229,7 +229,7 @@ class TestSolarData(unittest.TestCase):
 
         self.assertTrue(line.startswith('solaredge,model=SE10K-RWB48BFN4,serialnumber=7E1FF4D1 '))
         self.assertIn(',status=4i', line)
-        self.assertIn(',offgrid=f', line)
+        self.assertIn(',offgrid=0i', line)
         self.assertIn(',power_ac=597.0', line)
         self.assertIn(',meter1_power=939.4', line)
         self.assertIn(',battery1_soe=100.0', line)