diff --git a/io.openems.edge.meter.janitza/src/io/openems/edge/meter/janitza/umg104/Config.java b/io.openems.edge.meter.janitza/src/io/openems/edge/meter/janitza/umg104/Config.java
new file mode 100644
index 0000000000..809dd3fb6e
--- /dev/null
+++ b/io.openems.edge.meter.janitza/src/io/openems/edge/meter/janitza/umg104/Config.java
@@ -0,0 +1,38 @@
+package io.openems.edge.meter.janitza.umg104;
+
+import org.osgi.service.metatype.annotations.AttributeDefinition;
+import org.osgi.service.metatype.annotations.ObjectClassDefinition;
+
+import io.openems.common.types.MeterType;
+
+@ObjectClassDefinition(//
+		name = "Meter Janitza UMG 104", //
+		description = "Implements the Janitza UMG 104 power analyser.")
+@interface Config {
+
+	@AttributeDefinition(name = "Component-ID", description = "Unique ID of this Component")
+	String id() default "meter0";
+
+	@AttributeDefinition(name = "Alias", description = "Human-readable name of this Component; defaults to Component-ID")
+	String alias() default "";
+
+	@AttributeDefinition(name = "Is enabled?", description = "Is this Component enabled?")
+	boolean enabled() default true;
+
+	@AttributeDefinition(name = "Meter-Type", description = "What is measured by this Meter?")
+	MeterType type() default MeterType.PRODUCTION;
+
+	@AttributeDefinition(name = "Modbus-ID", description = "ID of Modbus bridge.")
+	String modbus_id() default "modbus0";
+
+	@AttributeDefinition(name = "Modbus Unit-ID", description = "The Unit-ID of the Modbus device. Defaults to '1' for Modbus/TCP.")
+	int modbusUnitId() default 1;
+
+	@AttributeDefinition(name = "Invert Power", description = "Inverts all Power values, inverts current values, swaps production and consumptioon energy, i.e. Power is multiplied with -1.")
+	boolean invert() default false;
+
+	@AttributeDefinition(name = "Modbus target filter", description = "This is auto-generated by 'Modbus-ID'.")
+	String Modbus_target() default "(enabled=true)";
+
+	String webconsole_configurationFactory_nameHint() default "Meter Janitza UMG 104 [{id}]";
+}
\ No newline at end of file
diff --git a/io.openems.edge.meter.janitza/src/io/openems/edge/meter/janitza/umg104/MeterJanitzaUmg104.java b/io.openems.edge.meter.janitza/src/io/openems/edge/meter/janitza/umg104/MeterJanitzaUmg104.java
new file mode 100644
index 0000000000..d5b359e3aa
--- /dev/null
+++ b/io.openems.edge.meter.janitza/src/io/openems/edge/meter/janitza/umg104/MeterJanitzaUmg104.java
@@ -0,0 +1,31 @@
+package io.openems.edge.meter.janitza.umg104;
+
+import io.openems.common.channel.Unit;
+import io.openems.common.types.OpenemsType;
+import io.openems.edge.common.channel.Doc;
+import io.openems.edge.common.component.OpenemsComponent;
+import io.openems.edge.common.modbusslave.ModbusSlave;
+import io.openems.edge.meter.api.ElectricityMeter;
+
+public interface MeterJanitzaUmg104 extends ElectricityMeter, OpenemsComponent, ModbusSlave {
+
+	public enum ChannelId implements io.openems.edge.common.channel.ChannelId {
+		ROTATION_FIELD(Doc.of(OpenemsType.INTEGER)),
+
+		INTERNAL_TEMPERATURE(Doc.of(OpenemsType.FLOAT) //
+				.unit(Unit.DEGREE_CELSIUS)), //
+		;
+
+		private final Doc doc;
+
+		private ChannelId(Doc doc) {
+			this.doc = doc;
+		}
+
+		@Override
+		public Doc doc() {
+			return this.doc;
+		}
+	}
+
+}
diff --git a/io.openems.edge.meter.janitza/src/io/openems/edge/meter/janitza/umg104/MeterJanitzaUmg104Impl.java b/io.openems.edge.meter.janitza/src/io/openems/edge/meter/janitza/umg104/MeterJanitzaUmg104Impl.java
new file mode 100644
index 0000000000..f328e10d40
--- /dev/null
+++ b/io.openems.edge.meter.janitza/src/io/openems/edge/meter/janitza/umg104/MeterJanitzaUmg104Impl.java
@@ -0,0 +1,175 @@
+package io.openems.edge.meter.janitza.umg104;
+
+import static io.openems.edge.bridge.modbus.api.ElementToChannelConverter.INVERT_IF_TRUE;
+import static io.openems.edge.bridge.modbus.api.ElementToChannelConverter.SCALE_FACTOR_3;
+
+import org.osgi.service.cm.ConfigurationAdmin;
+import org.osgi.service.component.ComponentContext;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.ConfigurationPolicy;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
+import org.osgi.service.component.annotations.ReferencePolicy;
+import org.osgi.service.component.annotations.ReferencePolicyOption;
+import org.osgi.service.metatype.annotations.Designate;
+
+import io.openems.common.channel.AccessMode;
+import io.openems.common.exceptions.OpenemsException;
+import io.openems.common.types.MeterType;
+import io.openems.edge.bridge.modbus.api.AbstractOpenemsModbusComponent;
+import io.openems.edge.bridge.modbus.api.BridgeModbus;
+import io.openems.edge.bridge.modbus.api.ModbusComponent;
+import io.openems.edge.bridge.modbus.api.ModbusProtocol;
+import io.openems.edge.bridge.modbus.api.element.DummyRegisterElement;
+import io.openems.edge.bridge.modbus.api.element.FloatDoublewordElement;
+import io.openems.edge.bridge.modbus.api.task.FC3ReadRegistersTask;
+import io.openems.edge.common.component.OpenemsComponent;
+import io.openems.edge.common.modbusslave.ModbusSlave;
+import io.openems.edge.common.modbusslave.ModbusSlaveTable;
+import io.openems.edge.common.taskmanager.Priority;
+import io.openems.edge.meter.api.ElectricityMeter;
+
+/**
+ * Implements the Janitza UMG 104 power analyzer.
+ *
+ * <p>
+ * https://www.janitza.de/umg-104-pro.html
+ */
+@Designate(ocd = Config.class, factory = true)
+@Component(//
+		name = "Meter.Janitza.UMG104", //
+		immediate = true, //
+		configurationPolicy = ConfigurationPolicy.REQUIRE //
+)
+public class MeterJanitzaUmg104Impl extends AbstractOpenemsModbusComponent
+		implements MeterJanitzaUmg104, ElectricityMeter, ModbusComponent, OpenemsComponent, ModbusSlave {
+
+	@Reference
+	private ConfigurationAdmin cm;
+
+	@Override
+	@Reference(//
+			policy = ReferencePolicy.STATIC, //
+			policyOption = ReferencePolicyOption.GREEDY, //
+			cardinality = ReferenceCardinality.MANDATORY //
+	)
+	protected void setModbus(BridgeModbus modbus) {
+		super.setModbus(modbus);
+	}
+
+	private MeterType meterType = MeterType.PRODUCTION;
+	/** Invert power values. */
+	private boolean invert = false;
+
+	public MeterJanitzaUmg104Impl() {
+		super(//
+				OpenemsComponent.ChannelId.values(), //
+				ModbusComponent.ChannelId.values(), //
+				ElectricityMeter.ChannelId.values(), //
+				MeterJanitzaUmg104.ChannelId.values() //
+		);
+
+		// Automatically calculate sum values from L1/L2/L3
+		ElectricityMeter.calculateSumCurrentFromPhases(this);
+		ElectricityMeter.calculateAverageVoltageFromPhases(this);
+	}
+
+	@Activate
+	private void activate(ComponentContext context, Config config) throws OpenemsException {
+		this.meterType = config.type();
+		this.invert = config.invert();
+
+		if (super.activate(context, config.id(), config.alias(), config.enabled(), config.modbusUnitId(), this.cm,
+				"Modbus", config.modbus_id())) {
+			return;
+		}
+	}
+
+	@Override
+	@Deactivate
+	protected void deactivate() {
+		super.deactivate();
+	}
+
+	@Override
+	public MeterType getMeterType() {
+		return this.meterType;
+	}
+
+	@Override
+	protected ModbusProtocol defineModbusProtocol() {
+		var modbusProtocol = new ModbusProtocol(this, //
+				new FC3ReadRegistersTask(1317, Priority.HIGH, //
+						m(ElectricityMeter.ChannelId.VOLTAGE_L1, new FloatDoublewordElement(1317), //
+								SCALE_FACTOR_3), //
+						m(ElectricityMeter.ChannelId.VOLTAGE_L2, new FloatDoublewordElement(1319), //
+								SCALE_FACTOR_3), //
+						m(ElectricityMeter.ChannelId.VOLTAGE_L3, new FloatDoublewordElement(1321), //
+								SCALE_FACTOR_3), //
+						new DummyRegisterElement(1323, 1324), //
+						m(ElectricityMeter.ChannelId.CURRENT_L1, new FloatDoublewordElement(1325), //
+								SCALE_FACTOR_3), //
+						m(ElectricityMeter.ChannelId.CURRENT_L2, new FloatDoublewordElement(1327), //
+								SCALE_FACTOR_3), //
+						m(ElectricityMeter.ChannelId.CURRENT_L3, new FloatDoublewordElement(1329), //
+								SCALE_FACTOR_3), //
+						new DummyRegisterElement(1331, 1332), //
+						m(ElectricityMeter.ChannelId.ACTIVE_POWER_L1, new FloatDoublewordElement(1333), //
+								INVERT_IF_TRUE(this.invert)), //
+						m(ElectricityMeter.ChannelId.ACTIVE_POWER_L2, new FloatDoublewordElement(1335), //
+								INVERT_IF_TRUE(this.invert)), //
+						m(ElectricityMeter.ChannelId.ACTIVE_POWER_L3, new FloatDoublewordElement(1337), //
+								INVERT_IF_TRUE(this.invert)), //
+						new DummyRegisterElement(1339, 1340), //
+						m(ElectricityMeter.ChannelId.REACTIVE_POWER_L1, new FloatDoublewordElement(1341), //
+								INVERT_IF_TRUE(this.invert)), //
+						m(ElectricityMeter.ChannelId.REACTIVE_POWER_L2, new FloatDoublewordElement(1343), //
+								INVERT_IF_TRUE(this.invert)), //
+						m(ElectricityMeter.ChannelId.REACTIVE_POWER_L3, new FloatDoublewordElement(1345), //
+								INVERT_IF_TRUE(this.invert)), //
+						new DummyRegisterElement(1347, 1368), //
+						m(ElectricityMeter.ChannelId.ACTIVE_POWER, new FloatDoublewordElement(1369), //
+								INVERT_IF_TRUE(this.invert)), //
+						m(ElectricityMeter.ChannelId.REACTIVE_POWER, new FloatDoublewordElement(1371), //
+								INVERT_IF_TRUE(this.invert))), //
+				new FC3ReadRegistersTask(1439, Priority.LOW, //
+						m(ElectricityMeter.ChannelId.FREQUENCY, new FloatDoublewordElement(1439), //
+								SCALE_FACTOR_3),
+						new DummyRegisterElement(1441, 1448),
+						m(MeterJanitzaUmg104.ChannelId.ROTATION_FIELD, new FloatDoublewordElement(1449), //
+								SCALE_FACTOR_3),
+						new DummyRegisterElement(1451, 1460),
+						m(MeterJanitzaUmg104.ChannelId.INTERNAL_TEMPERATURE, new FloatDoublewordElement(1461), //
+								SCALE_FACTOR_3)
+				));
+
+		if (this.invert) {
+			modbusProtocol.addTask(new FC3ReadRegistersTask(9851, Priority.LOW, //
+					m(ElectricityMeter.ChannelId.ACTIVE_CONSUMPTION_ENERGY, new FloatDoublewordElement(9851)),
+					new DummyRegisterElement(9853, 9862),
+					m(ElectricityMeter.ChannelId.ACTIVE_PRODUCTION_ENERGY, new FloatDoublewordElement(9863))));
+		} else {
+			modbusProtocol.addTask(new FC3ReadRegistersTask(9851, Priority.LOW, //
+					m(ElectricityMeter.ChannelId.ACTIVE_PRODUCTION_ENERGY, new FloatDoublewordElement(9851)),
+					new DummyRegisterElement(9853, 9862),
+					m(ElectricityMeter.ChannelId.ACTIVE_CONSUMPTION_ENERGY, new FloatDoublewordElement(9863))));
+		}
+
+		return modbusProtocol;
+	}
+
+	@Override
+	public String debugLog() {
+		return "L:" + this.getActivePower().asString();
+	}
+
+	@Override
+	public ModbusSlaveTable getModbusSlaveTable(AccessMode accessMode) {
+		return new ModbusSlaveTable(//
+				OpenemsComponent.getModbusSlaveNatureTable(accessMode), //
+				ElectricityMeter.getModbusSlaveNatureTable(accessMode) //
+		);
+	}
+}
diff --git a/io.openems.edge.meter.janitza/test/io/openems/edge/meter/janitza/umg104/MeterJanitzaUmg104ImplTest.java b/io.openems.edge.meter.janitza/test/io/openems/edge/meter/janitza/umg104/MeterJanitzaUmg104ImplTest.java
new file mode 100644
index 0000000000..187eb07aa1
--- /dev/null
+++ b/io.openems.edge.meter.janitza/test/io/openems/edge/meter/janitza/umg104/MeterJanitzaUmg104ImplTest.java
@@ -0,0 +1,25 @@
+package io.openems.edge.meter.janitza.umg104;
+
+import static io.openems.common.types.MeterType.GRID;
+
+import org.junit.Test;
+
+import io.openems.edge.bridge.modbus.test.DummyModbusBridge;
+import io.openems.edge.common.test.ComponentTest;
+import io.openems.edge.common.test.DummyConfigurationAdmin;
+
+public class MeterJanitzaUmg104ImplTest {
+
+	@Test
+	public void test() throws Exception {
+		new ComponentTest(new MeterJanitzaUmg104Impl()) //
+				.addReference("cm", new DummyConfigurationAdmin()) //
+				.addReference("setModbus", new DummyModbusBridge("modbus0")) //
+				.activate(MyConfig.create() //
+						.setId("meter0") //
+						.setModbusId("modbus0") //
+						.setType(GRID) //
+						.build()) //
+		;
+	}
+}
\ No newline at end of file
diff --git a/io.openems.edge.meter.janitza/test/io/openems/edge/meter/janitza/umg104/MyConfig.java b/io.openems.edge.meter.janitza/test/io/openems/edge/meter/janitza/umg104/MyConfig.java
new file mode 100644
index 0000000000..c04162b5ed
--- /dev/null
+++ b/io.openems.edge.meter.janitza/test/io/openems/edge/meter/janitza/umg104/MyConfig.java
@@ -0,0 +1,86 @@
+package io.openems.edge.meter.janitza.umg104;
+
+import io.openems.common.test.AbstractComponentConfig;
+import io.openems.common.types.MeterType;
+import io.openems.common.utils.ConfigUtils;
+
+@SuppressWarnings("all")
+public class MyConfig extends AbstractComponentConfig implements Config {
+
+	protected static class Builder {
+		private String id;
+		private String modbusId;
+		private int modbusUnitId;
+		private MeterType type;
+		private boolean invert;
+
+		private Builder() {
+		}
+
+		public Builder setId(String id) {
+			this.id = id;
+			return this;
+		}
+
+		public Builder setModbusId(String modbusId) {
+			this.modbusId = modbusId;
+			return this;
+		}
+
+		public Builder setType(MeterType type) {
+			this.type = type;
+			return this;
+		}
+
+		public Builder setInvert(boolean invert) {
+			this.invert = invert;
+			return this;
+		}
+
+		public MyConfig build() {
+			return new MyConfig(this);
+		}
+	}
+
+	/**
+	 * Create a Config builder.
+	 *
+	 * @return a {@link Builder}
+	 */
+	public static Builder create() {
+		return new Builder();
+	}
+
+	private final Builder builder;
+
+	private MyConfig(Builder builder) {
+		super(Config.class, builder.id);
+		this.builder = builder;
+	}
+
+	@Override
+	public String modbus_id() {
+		return this.builder.modbusId;
+	}
+
+	@Override
+	public String Modbus_target() {
+		return ConfigUtils.generateReferenceTargetFilter(this.id(), this.modbus_id());
+	}
+
+	@Override
+	public int modbusUnitId() {
+		return this.builder.modbusUnitId;
+	}
+
+	@Override
+	public MeterType type() {
+		return this.builder.type;
+	}
+
+	@Override
+	public boolean invert() {
+		return this.builder.invert;
+	}
+
+}
\ No newline at end of file