Reading data from Huawei inverter SUN 2000 (3KTL-10KTL) via modbus TCP and RTU

splatch · December 30, 2023, 5:56pm

Proper setup migh depend on inverter model/firmware. The error message you got indicates that you read to little data to map it to expected type. As far I remember you need 4 bytes for uint32 (32 bits / 8 per byte => 4 bytes => 2 data registers). Make sure you adjust also read length/end.
Overall advice from huawei support I got was to read larger blocks but less often. The timeout might be result of improper handling of errors on SDongle/inverter, generally you can then assume that configuration is invalid.

PabloP · December 30, 2023, 6:21pm

Is there any documentation to check what are the address of those registries ? Otherwise it’s a high chance that I will be reading some random data. For instance I’m reading an address of 37002 and it gives me some value between 10,000 and 50,000. How would I know what I’m reading?

PabloP · December 30, 2023, 7:55pm

After reading the thread again as well as “SUN2000L V200R001 MODBUS Interface Definitions” doc file now I get it … and what’s important I made it running.

As I have all the data, I want to visualise it. Is the energie.widget.json file shared there applicable for OH4?
I don’t have much an experience with habpanel. How can I add that widget?

splatch · December 30, 2023, 9:08pm

Each UI is a separate component, you might look at widgets shared in marketplace category as they have some examples of PV/energy widgets, but for mainui.
Ideally if you run into troubles with habpanel widget you can start new thread with more precise description of issue.

Matze0211 · December 31, 2023, 11:48am

Hi,

with the help of this topic I was able to integrate my Huawei inverter into OH.
In general its working fine, however I receive random timeout errors with the setup below.

Question:
Any best practice / guidance someone can share on configuring the connection / timing / retry parameter in a better way?

Thanks in advance for any help!

SUN2000-4KTL-M1 inverter (SW: V100R001C00SPC153)
LUNA2000 battery (SW: V100R002C00SPC119)
Smart Dongle A-05 (SW: V100R001C00SPC125)

1 TCP thing:

thingTypeUID: modbus:tcp
configuration:
  rtuEncoded: false
  connectMaxTries: 3
  reconnectAfterMillis: 20000
  timeBetweenTransactionsMillis: 5000
  port: 502
  timeBetweenReconnectMillis: 10
  connectTimeoutMillis: 10000
  host: 192.168.58.144
  afterConnectionDelayMillis: 10000
  id: 1
  enableDiscovery: false

5 Poller things, all with the following config (of cause with different start & length):

thingTypeUID: modbus:poller
configuration:
  length: 4
  start: 37015
  refresh: 60000
  maxTries: 3
  cacheMillis: 50
  type: holding

10 Data things, all with the following config:

thingTypeUID: modbus:data
configuration:
  readValueType: uint16
  readTransform: JS:divide.js?d=10
  writeTransform: default
  readStart: "37004"
  updateUnchangedValuesEveryMillis: 30000
  writeMultipleEvenWithSingleRegisterOrCoil: false
  writeMaxTries: 3

and the following error messages in:

==> /var/log/openhab/openhab.log <==
2023-12-31 12:41:22.262 [WARN ] [rt.modbus.internal.ModbusManagerImpl] - Try 1 out of 3 failed when executing request (ModbusReadRequestBlueprint [slaveId=1, functionCode=READ_MULTIPLE_REGISTERS, start=32080, length=2, maxTries=3]). Will try again soon. Error was I/O error, so resetting the connection. Error details: net.wimpi.modbus.ModbusIOException I/O exception: SocketTimeoutException Read timed out [operation ID 99eaa83d-055d-4117-9330-8346f5404ce5]
2023-12-31 12:41:32.282 [WARN ] [rt.modbus.internal.ModbusManagerImpl] - Try 2 out of 3 failed when executing request (ModbusReadRequestBlueprint [slaveId=1, functionCode=READ_MULTIPLE_REGISTERS, start=32080, length=2, maxTries=3]). Will try again soon. The response did not match the request. Resetting the connection. Error details: org.openhab.core.io.transport.modbus.exception.ModbusUnexpectedTransactionIdException Transaction id of request (16715) does not equal response (16714). Slave response is invalid. [operation ID 99eaa83d-055d-4117-9330-8346f5404ce5]
2023-12-31 12:42:27.269 [WARN ] [rt.modbus.internal.ModbusManagerImpl] - Try 1 out of 3 failed when executing request (ModbusReadRequestBlueprint [slaveId=1, functionCode=READ_MULTIPLE_REGISTERS, start=37113, length=12, maxTries=3]). Will try again soon. Error was I/O error, so resetting the connection. Error details: net.wimpi.modbus.ModbusIOException I/O exception: SocketTimeoutException Read timed out [operation ID 142ed2b6-0263-40e4-879d-7a71fa68a91f]

splatch · December 31, 2023, 2:05pm

I wrote some time ago about this, there is a severe bug in SDongle, it confuses requests when multiple connections are being made. Make sure you have only one tcp connection at the time!

Don’t ask how I found it.

Matze0211 · December 31, 2023, 4:22pm

That sounds reasonable.

I only have OH connecting via modbus to the dongle and using the fusion solar app. As the app is not using modbus it will not count towards the connection limit (at least that’s my understanding).

There is no other device / server (beside OH) that will connect to the dongle.

How can I configure my things, that they do not create multiple connections (I only have 1 tcp thing)?

Jan_10 · January 29, 2024, 11:20am

Hi Matze,

would it be possible to post your full setup? Items, things etc?
I don’t get it working unforunately :-/

Thanks in advance.

Matze0211 · January 29, 2024, 1:57pm

I can have a look later, as I have managed everything via UI I need to copy and paste this.

I tried item based configuration before an also was failing, as all things went online at the same time and to many poller sending requests. Only if I enable one thing slowly after another, it will work.

Maybe that’s already helpful to know

To-Ki · February 10, 2024, 8:19am

Which firmware do you have? I get every Bridge and Thing online, but the Items only contains NULL values. And the log file is full of error…

Dongle firmware V100R001C00SPC125
Inverter (SUN2000-5KTL-M1) Firmware: V100R001C00SPC153

2024-02-10 09:50:09.129 [WARN ] [rt.modbus.internal.ModbusManagerImpl] - Execution of scheduled (5000ms) poll task BasicPollTask [getEndpoint=ModbusIPSlaveEndpoint [address=wechselrichter.fritz.box, port=502], request=ModbusReadRequestBlueprint [slaveId=1, functionCode=READ_MULTIPLE_REGISTERS, start=32064, length=31, maxTries=3], getResultCallback()=org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator@2c11578f, getFailureCallback()=org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator@2c11578f] failed unexpectedly. Ignoring exception, polling again according to poll interval.
java.lang.NullPointerException: Cannot invoke "java.util.Map.put(Object, Object)" because "this.global" is null
	at com.oracle.truffle.js.scriptengine.GraalJSBindings.put(GraalJSBindings.java:130) ~[?:?]
	at javax.script.SimpleScriptContext.setAttribute(SimpleScriptContext.java:246) ~[java.scripting:?]
	at org.openhab.core.automation.module.script.ScriptTransformationService.transform(ScriptTransformationService.java:187) ~[?:?]
	at org.openhab.binding.modbus.internal.SingleValueTransformation.transform(SingleValueTransformation.java:140) ~[?:?]
	at org.openhab.binding.modbus.internal.CascadedValueTransformationImpl.transform(CascadedValueTransformationImpl.java:50) ~[?:?]
	at org.openhab.binding.modbus.internal.ValueTransformation.transformState(ValueTransformation.java:48) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.lambda$16(ModbusDataThingHandler.java:999) ~[?:?]
	at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1707) ~[?:?]
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.processUpdatedValue(ModbusDataThingHandler.java:967) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.onRegisters(ModbusDataThingHandler.java:845) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.lambda$11(ModbusDataThingHandler.java:799) ~[?:?]
	at java.util.Optional.ifPresent(Optional.java:178) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.onReadResult(ModbusDataThingHandler.java:799) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.lambda$2(ModbusPollerThingHandler.java:144) ~[?:?]
	at java.util.concurrent.CopyOnWriteArrayList.forEach(CopyOnWriteArrayList.java:807) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.notifyChildren(ModbusPollerThingHandler.java:142) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.handleResult(ModbusPollerThingHandler.java:88) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.handle(ModbusPollerThingHandler.java:105) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusLibraryWrapper.invokeCallbackWithResponse(ModbusLibraryWrapper.java:332) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$PollOperation.lambda$1(ModbusManagerImpl.java:216) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.SimpleStopWatch.timeRunnable(SimpleStopWatch.java:152) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$PollOperation.accept(ModbusManagerImpl.java:216) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$PollOperation.accept(ModbusManagerImpl.java:1) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl.executeOperation(ModbusManagerImpl.java:613) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$ModbusCommunicationInterfaceImpl.lambda$1(ModbusManagerImpl.java:810) ~[?:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305) [?:?]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) [?:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
	at java.lang.Thread.run(Thread.java:840) [?:?]
2024-02-10 09:50:24.501 [WARN ] [rt.modbus.internal.ModbusManagerImpl] - Execution of scheduled (10000ms) poll task BasicPollTask [getEndpoint=ModbusIPSlaveEndpoint [address=wechselrichter.fritz.box, port=502], request=ModbusReadRequestBlueprint [slaveId=1, functionCode=READ_MULTIPLE_REGISTERS, start=30073, length=10, maxTries=3], getResultCallback()=org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator@31dc4737, getFailureCallback()=org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator@31dc4737] failed unexpectedly. Ignoring exception, polling again according to poll interval.
java.lang.NullPointerException: Cannot invoke "java.util.Map.put(Object, Object)" because "this.global" is null
	at com.oracle.truffle.js.scriptengine.GraalJSBindings.put(GraalJSBindings.java:130) ~[?:?]
	at javax.script.SimpleScriptContext.setAttribute(SimpleScriptContext.java:246) ~[java.scripting:?]
	at org.openhab.core.automation.module.script.ScriptTransformationService.transform(ScriptTransformationService.java:187) ~[?:?]
	at org.openhab.binding.modbus.internal.SingleValueTransformation.transform(SingleValueTransformation.java:140) ~[?:?]
	at org.openhab.binding.modbus.internal.CascadedValueTransformationImpl.transform(CascadedValueTransformationImpl.java:50) ~[?:?]
	at org.openhab.binding.modbus.internal.ValueTransformation.transformState(ValueTransformation.java:48) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.lambda$16(ModbusDataThingHandler.java:999) ~[?:?]
	at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1707) ~[?:?]
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.processUpdatedValue(ModbusDataThingHandler.java:967) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.onRegisters(ModbusDataThingHandler.java:845) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.lambda$11(ModbusDataThingHandler.java:799) ~[?:?]
	at java.util.Optional.ifPresent(Optional.java:178) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.onReadResult(ModbusDataThingHandler.java:799) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.lambda$2(ModbusPollerThingHandler.java:144) ~[?:?]
	at java.util.concurrent.CopyOnWriteArrayList.forEach(CopyOnWriteArrayList.java:807) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.notifyChildren(ModbusPollerThingHandler.java:142) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.handleResult(ModbusPollerThingHandler.java:88) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.handle(ModbusPollerThingHandler.java:105) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusLibraryWrapper.invokeCallbackWithResponse(ModbusLibraryWrapper.java:332) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$PollOperation.lambda$1(ModbusManagerImpl.java:216) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.SimpleStopWatch.timeRunnable(SimpleStopWatch.java:152) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$PollOperation.accept(ModbusManagerImpl.java:216) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$PollOperation.accept(ModbusManagerImpl.java:1) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl.executeOperation(ModbusManagerImpl.java:613) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$ModbusCommunicationInterfaceImpl.lambda$1(ModbusManagerImpl.java:810) ~[?:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305) [?:?]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) [?:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
	at java.lang.Thread.run(Thread.java:840) [?:?]
2024-02-10 09:50:40.411 [WARN ] [rt.modbus.internal.ModbusManagerImpl] - Execution of scheduled (5000ms) poll task BasicPollTask [getEndpoint=ModbusIPSlaveEndpoint [address=wechselrichter.fritz.box, port=502], request=ModbusReadRequestBlueprint [slaveId=1, functionCode=READ_MULTIPLE_REGISTERS, start=32064, length=31, maxTries=3], getResultCallback()=org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator@2c11578f, getFailureCallback()=org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator@2c11578f] failed unexpectedly. Ignoring exception, polling again according to poll interval.
java.lang.NullPointerException: Cannot invoke "java.util.Map.put(Object, Object)" because "this.global" is null
	at com.oracle.truffle.js.scriptengine.GraalJSBindings.put(GraalJSBindings.java:130) ~[?:?]
	at javax.script.SimpleScriptContext.setAttribute(SimpleScriptContext.java:246) ~[java.scripting:?]
	at org.openhab.core.automation.module.script.ScriptTransformationService.transform(ScriptTransformationService.java:187) ~[?:?]
	at org.openhab.binding.modbus.internal.SingleValueTransformation.transform(SingleValueTransformation.java:140) ~[?:?]
	at org.openhab.binding.modbus.internal.CascadedValueTransformationImpl.transform(CascadedValueTransformationImpl.java:50) ~[?:?]
	at org.openhab.binding.modbus.internal.ValueTransformation.transformState(ValueTransformation.java:48) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.lambda$16(ModbusDataThingHandler.java:999) ~[?:?]
	at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1707) ~[?:?]
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.processUpdatedValue(ModbusDataThingHandler.java:967) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.onRegisters(ModbusDataThingHandler.java:845) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.lambda$11(ModbusDataThingHandler.java:799) ~[?:?]
	at java.util.Optional.ifPresent(Optional.java:178) ~[?:?]
	at org.openhab.binding.modbus.internal.handler.ModbusDataThingHandler.onReadResult(ModbusDataThingHandler.java:799) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.lambda$2(ModbusPollerThingHandler.java:144) ~[?:?]
	at java.util.concurrent.CopyOnWriteArrayList.forEach(CopyOnWriteArrayList.java:807) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.notifyChildren(ModbusPollerThingHandler.java:142) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.handleResult(ModbusPollerThingHandler.java:88) ~[?:?]
	at org.openhab.binding.modbus.handler.ModbusPollerThingHandler$ReadCallbackDelegator.handle(ModbusPollerThingHandler.java:105) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusLibraryWrapper.invokeCallbackWithResponse(ModbusLibraryWrapper.java:332) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$PollOperation.lambda$1(ModbusManagerImpl.java:216) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.SimpleStopWatch.timeRunnable(SimpleStopWatch.java:152) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$PollOperation.accept(ModbusManagerImpl.java:216) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$PollOperation.accept(ModbusManagerImpl.java:1) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl.executeOperation(ModbusManagerImpl.java:613) ~[?:?]
	at org.openhab.core.io.transport.modbus.internal.ModbusManagerImpl$ModbusCommunicationInterfaceImpl.lambda$1(ModbusManagerImpl.java:810) ~[?:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) [?:?]
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305) [?:?]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) [?:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
	at java.lang.Thread.run(Thread.java:840) [?:?]

chrode · February 12, 2024, 2:23pm

Dongle (SDongleA-05) V100R001C00SPC133
Inverter (SUN2000-5KTL-M1) V100R001C00SPC153

works for me

Matze0211 · February 18, 2024, 4:49pm

What I read from the error message is, that your script transformation is not working correctly.
Try without transformation first to validate, if the binding is working and you see the raw data.

Matze0211 · February 18, 2024, 4:59pm

Sorry, it took a while.

But that’s my config:

TCP thing

UID: modbus:tcp:PV_TCP
label: PV Anlage - Modbus TCP Slave
thingTypeUID: modbus:tcp
configuration:
  rtuEncoded: false
  connectMaxTries: 3
  reconnectAfterMillis: 10000
  timeBetweenTransactionsMillis: 5000
  port: 502
  timeBetweenReconnectMillis: 10
  connectTimeoutMillis: 10000
  host: XXX
  afterConnectionDelayMillis: 10000
  id: 1
  enableDiscovery: false

Poller thing (active power from the meter in this case):

UID: modbus:poller:PV_TCP:PV_Poll_Meter_ActivePower
label: PV Poll Meter Active Power
thingTypeUID: modbus:poller
configuration:
  length: 12
  start: 37113
  refresh: 60000
  maxTries: 3
  cacheMillis: 50
  type: holding
bridgeUID: modbus:tcp:PV_TCP

Data Thing:

UID: modbus:data:PV_Poll_Meter_ActivePower:PV_Data_Meter_ActivePower
label: PV Data Meter Active Power
thingTypeUID: modbus:data
configuration:
  readValueType: int32
  readTransform: JS:divide.js?d=1
  writeTransform: default
  readStart: "37113"
  updateUnchangedValuesEveryMillis: 30000
  writeMultipleEvenWithSingleRegisterOrCoil: false
  writeMaxTries: 3
bridgeUID: modbus:poller:PV_TCP:PV_Poll_Meter_ActivePower

Item is a number item linked to the “Value as Number” channel with default profile.

Things I observed:
If you tested with other tools to establish a modbus connection, maybe the old connection is still open and it helps to restart the inverter.

If you mass create the things via thing file and all things go online at the same time, it did not worked for me.
I therefore created them via gui one by one.
Also after restarting OH this sometimes leads to issues and I manually need to disable all modbus things and enable them one after the other.

chill.kroete · February 27, 2024, 8:03am

Hi. This thread is quite huge and I am not sure if I understood correctly.
I might be accepting an offer with an Huawei SUN2000-10KTL-M1 inverter, LUNA2000-5-S0 battery and Smart Power Sensor DTSU666-HW. But of course I only want it to get it if I am 100% sure if I can integrate it somehow into openHAB.
Could someone please confirm whether I can get current power consumption of my house, current PV gain and battery state from these components? Thanks!

chris4789 · February 27, 2024, 8:46am

I have the 8KTL-M1 and the power sensor which are working as expected on OH.
Following a screenshot showing what I have inserted in a sitemap:

chill.kroete · March 8, 2024, 9:29am

@chris4789 do you mind explaining how you read the data in detail?

debacher · March 18, 2024, 9:10am

I have documented the integration of my Sun2000 in OpenHAB at Huawei Sun2000 mit OpenHAB – Debacher-Wiki.

The text is in German, but if in doubt, deepl.com can help with the translation.

mstormi · March 18, 2024, 1:18pm

Thanks!
Have you attempted to force charging the battery ? Do you have any docs on how that would work ?

ollo · March 18, 2024, 1:53pm

Hi Markus,

I have implemented it and working quite nicely with some (complex) rules. It only needs 3 or 4 Modbus registers to be written to force the charging. Will share later once I’m back on my OH system. I “reverse-engineered” it from the HA implementation in GitHub (GitHub - wlcrs/huawei_solar: Home Assistant integration for Huawei Solar inverters via Modbus).

debacher · March 18, 2024, 5:57pm

Why should I force the battery to charge?

My inverter (Sun2000) always charges the battery (Luna2000) before it feeds into the grid.
And charging from the grid would make no economic sense.

So I never need to force charging.