[Feature Request]: Huawei Energy Management Assistant (EMMA-A01 / A02) Support #498
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FYI Huawei have released an installation videa for the EMMA devices, and a new User Guide that includes updating network information. Note: The EMMA is a device that manages energy in a home with a PV system. It can implement unified scheduling and management of home energy. The EMMA has two models: EMMA-A01: Only PV and ESS features are supported. Plant-level power control functions, such as maximum self-consumption and grid-tied point control, are supported for unified scheduling of home energy and plant-level energy optimization, further improving the PV energy utilization EMMA-A02: Features of PV, ESSs, smart chargers, and smart loads are supported. In addition to unified scheduling of home energy, the EMMA-A02 can connect to smart loads such as chargers, SG Ready heat pumps, and smart switches. Users can set the reservation time to charge vehicles and heat water in advance at the specified time. In addition, users can set the priority to use PV energy for devices as required to make the best use of PV energy. EMMA Installation Video: https://support.huawei.com/enterprise/en/doc/EDOC1100338746?idAbsPath=7639526%7C258788303%7C258788491%7C258789989%7C23205712%7C256539983 [EMMA-(A01, A02) User Manual - 2023-10-31 - v02.pdf](https://github.com/wlcrs/huawei_solar/files/13445816/EMMA-.A01.A02.User.Manual.-.2023-10-31.-.v02.pdf) from https://support.huawei.com/enterprise/en/doc/EDOC1100325377/9a24721e/networking Comments: Updated network diagrams appear to confirm that the EMMA will replace the sDongle as the (default?) method to provide connectivity for inverters/site to FusionSolar, whilst the DDSU/DTSU-666 meters will also be superceded with the EMMA providing this functionality also (option to use inbuilt CT's <63A or connect external CT's for >63A systems). There is only reference to modbus-tcp in relation to certificates and authenticating with 'peer NMS' and FusionSolar.
Looking at the RS485 details, it has an RS485 A and B, with A going to the inverter/cascade and B for '3rd party devices'.
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Hi, |
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@torwag the EMMA appliance is a replacement option for the DDSU/DTSU-666H, USB sDongle etc so from an inverters persepctive is doesn't matter is its 1 or 3 inverters in a cascade. Instead of wiring in the DDSU/DTSU-666H in future you'll connect the EMMA via that RS485 port. Also read the prior posts carefully and you'll notice at the bottom of 'Figure 2-2' it mentions: "Inverters connect to the EMMA over RS485. A maximum of three inverters can be connected in parallel" Worth noting also is that since that post, Huawei / Shelly have also announced that EMMA can integrate with some of their devices, see:
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Hello When do you want to start the integration? |
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Do you have an EMMA installed already and are offering to install the current WLCRS integration version and see if it 'mostly' works already (assuming it uses the same modbus registers as the DDSU/DTSU-666H for the power meter data)? Post that your able to provide WLCRS with remote access to your setup to allow him to develop and test, for any new modbus registers that are required? |
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Hello Konfiguration --> SUN2000-10KTL-M1 (Modbus 1) --> SUN2000-5KTL-M1 (Modbus 2) Attention |
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@MarkusKAuatria "Emma is connected via pin 2/3 and not via PIN 5/7 like the DTSU" PIN 5 ias 'shielding ground' (shared with LUNA also) with PIN7 (485A2) and PIN9 (RS485B2) being used to connect to the DTSU-666H. Are you sure that EMMA is correctly wired though with it using PIN 2 (RS485B1-1 'Differential -') and PIN 3 (RS485A1-2 'Differential +'), apart from these being from different pairs, the Huawei documentation shows it as PIN 1 (+) and PIN 3 (-) , that is also the A1/B1 pair previously used to cascade (i.e. out from 1&3 from higher up modbus device, that then goes into 2&4 from lower device in the cascade)? See diagram posted earlier/above, from the EMMA manual. Note: This would mean that EMMA now would become the Modbus Master, with the 'primary' inverter now becoming a modbus slave to it. Hoping that Huawei used the same modbus registers that the DDSU/DTSU-666H meter uses, meaning the Smart Meter part of EMMA will work with WLCRS. I haven't see any updated information as to Modbus Registers for EMMA, and IF it adds any new ones to 'share' whatever additional data has / provides access to. |
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@MarkusKAuatria Can you also download the latest (and current only) file from https://support.huawei.com/enterprise/en/fusionsolar/smarthems-pid-256539983/software/ and upload it here? For SUN2000 software downloads, the ZIP-files with the firmware updates also include PDF's with documentation on how the available modbus registers look like. As I do not own such a device, I do not have access to those downloads. |
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@wlcrs @Roving-Ronin |
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Just out of curiosity, what would be the benefit of the EMMA for home assistant integration? As I understood, the "smart" features would be why we connect it to home assistant in the first place. |
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@torwag EMMA combines the modbus access and network connectivity (WiFi and Ethernet) previously provided by the sDongle, the DDSU/DTSU-666H smart meter functions into one unit, whilst then also adding support and connectivity for the Huawei EV charger(s), Load Shedding/Control (via select Shelly devices) and abilty to access cloud data (e.g. forecasts) and your usage trends to provide some 'intelligence' to a Huawei installation. Yes WLCRS + HA users will still be taking this a step further and pulling in their own data and making automations etc, but the main thing is EMMA appears to be 'the' preferred solution for adding network connectivity, and smart/consumption meter to Huawei installs going forward (vs multiple seperate items). Huawei is also pushing this by the fact that the new Backup Box (aka the SmartGuard) includes an EMMA built into it. From a business perspective for Huawei it also means they are moving from having to buy another vendors consumption meter and work with it, to now producing and selling their own meter (and extra functionality) that they control the IP for, meaning better profits potentially but also potentially reducing their support costs (from issues arising from DDSU/DTSU-666H). BTW trying to remember, was your setup the one with 3 inverters, with each essentially going to seperate users/apartments? Otherwise, why don't you just cascase them all together (bit of Cat5e cable), the only need 1 sDongle connection for the lot and 1 DDSU/DTSU-666H meter? @MarkusKAuatria |
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I've received access details from Markus. The EMMA device does not have any open TCP ports at the moment, so he will need to check if he can access a setting to fix this (which seems to be available according to a screenshot from the manual ). Alternatively, the EMMA-device also exposes a serial Modbus RTU interface on 2 pins (cfr. bottom screenshot of #498 (comment)). So that is another scenario that we can explore if necessary. |
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Hello, now that there should be more EMMAs in the field, have you received any new information about possible ways to access EMMA? :) I hope Huawei won't keep it closed to third-party apps for querying their devices. |
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The EMMA device I had access to via Markus does not answer to any queries: not via TCP, not via RTU (serial). We haven't been able to obtain instructions on how we can locally connect to a solar installation with EMMA from Huawei. I would urge everybody considering to order a Huawei Solar installation with EMMA device to first contact Huawei to verify if a local Modbus-connection is supported. If possible, please obtain a manual on how to achieve this and share it with me here. |
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Oh, that's too bad, that is certainly not an optimal situation. I have also tried to get information on the topic as a potential future Huawei customer. Huawei's technical support didn't provide any information because I am not a customer (couldn't provide a device serial no) and referred me to a distributor. The distributor also didn't want to tell me anything because I am an end user. I guess a Huawei device owner would have to open a service request. |
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Hallo
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Hi,
And did you get a chance to try to connect through the inverter Wifi? It should be Independant from the EMMA no?
BR
Thomas
Le 5 juin 2024 à 17:07 +0200, Markus ***@***.***>, a écrit :
… Hallo
These were the last two feedbacks from HUAWEI Support
• > Unfortunately, we do not have any guideline about how access works exactly and how the individual services can be accessed (Modbus TCP, MQTT, web,...) especially for EMMA-A02.
• > Please be advised that we created related SR NO. xxxxxxx and we will come back with a resolution as soon as possible.
Kindly ask you to choose the option “Reply All” when communicating with our engineers in order to track your response easily.
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@tmenguy the issue is adding support for EMMA, especially given in future installations it replaces the sDongle, DDSU/DTSU-666H consumption meter and becomes the primary means for communication for the plant (that also has 2 x M1 3p inverters). |
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Yes, and I was looking at adding an EMMA to my existing installation (with the new backup box ... but it is not 3phases for now it seems). But correct me if I'm wrong: it will replace the meter and Sdongle all at once, but the inverter wifi will stay no? so perhaps there is a way to still connect through it? |
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@tmenguy The EMMA-A02 is available to support 3p, with AC voltage options of: The SmartGuard documentation has started mentioning a 'SmartGuard-63A-T0' with T0 = Three-phase Whole Home Backup system. See: Networking Quick Guide: https://support.huawei.com/enterprise/en/doc/EDOC1100366779?idPath=258788303|258788483|258789967|21102414|21571652 Be aware though, that whilst it mentions 'whole home backup' have a look at the wiring diagram: You'll note that it refers to 'Backup Load' and 'Non Backup Load', then have a look at the new 5k-12k MAP0 inverter series manual, with some handy networking diagrams on page 17-18:
From this it appears the SmartGuard-63A-T0 will allow connecting the grid feed into it and then attaching the (bulk of the) house to its protected output up to 63A, so its now inline between your previous grid feed and the switchboard. You could then attach your 3p HVAC/Ducted Aircon unit to the unprotected circuit. Idea appears to be that you are protected this way and then can add an Automatic Transfer Switch (ATS) in to allow cutting over from a grid/mains feed to having a generator kick in, so your LUNA ESS + SmartGuard 'protects' the house for the 20ms until the generator kicks in automatically. Note that is with the MAP0 inverters and typically it costs a few extra $ for a 3p with a automatic start. If you have the $ for a 3p generator and already have a M1 inverter(s), you could just have an ATS / Manual Transfer Switch (that don't cost much) installed and rely upon the LUNA covering you for a few minutes and walking outside and manually starting the generator. |
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Hello, the new backup box Smartguard can also only supply 1 phase. The 3-phase designation refers to the inverter. There will be a real 3-phase backup box from Huawei in the future, but it will not be able to work together with the inverters currently on the market. There will be a new inverter for this backup box. The reason is that the current inverters are not unbalanced load capable. |
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@Roving-Ronin thanks a lot for the, as always very detailed answer, I've seen only the S0 and not the T0 smartGuard, but loosing HA connection may be a no brainer to me if we don't find a way to connect to EMMA. |
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@ismiregal17 Good point, overlooked that.... |
Describe your feature request
As per the wall charger feature request, this 'issue' is intended as a location for people to be able to start gathering information and discussing how it works and how it may potentially be supported in the integration.
Given that the EMMA in future will be the preferred method of installation for Huawei Solar installations, with it :
Hopefully Huawei will be utilising the same modbus registers used on the DDSU/DTSU-666H meters, to provide themselves with maximum compatibility for existing installations upgrading, that will allow for 'out of the box' compatibility with WLCRS. However this needs to be confirmed when documentation is published detailing the modbus register definitions for EMMA.
As EMMA is adding additional functionality, it would be a good expectation that there may be additional modbus registers added to EMMA, that would then need to be reviewed and see if any are 'worthwhile' or of use to request being added to WLCRS.
To date documentation published on EMMA is:
EMMA-(A01, A02) User Manual.pdf v01 - Superceded
FusionSolar App Quick Guide (EMMA).pdf
Huawei - EMMA Quick Installation Guide.pdf
Proper usage
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