Sig Energy System Integration

Third party integrations
62

I’ve just installed the integration and it seems to work working well :slight_smile:

I see there’s an “energy flow gauge” which looks really useful, but it only has images rather than code to create it. Does anyone know if that dashboard is available anywhere?

There’s loads of exceptions in the home assistant logs about the Sigen automations.

2025-03-27 09:18:10.787 ERROR (MainThread) [homeassistant.components.modbus.modbus] Pymodbus: Sigen: Error: device: 247 address: 40032 -> Exception Res>
2025-03-27 09:18:16.848 ERROR (Recorder) [homeassistant.components.recorder.core] Error while processing event CompileMissingStatisticsTask()


another

2025-03-27 09:18:09.168 ERROR (MainThread) [homeassistant.components.template.template_entity] TemplateError('ZeroDivisionError: float division by zero>
  (
    (
      states('sensor.sigen_accumulated_discharge_energy') | float
    )
    /
    (
      states('sensor.sigen_rated_battery_capacity') | float / 5 * 15850
    ) * 100
  ) | round(1)
}}) renders=4>' for attribute '_attr_native_value' in entity 'sensor.sigen_5kwh_battery_waranty_life_spent'
2025-03-27 09:18:09.169 ERROR (MainThread) [homeassistant.helpers.event] Error while processing template: Template<template=({{
63

Does modbus TCP have to be enabled by the installer or can it be done by the user?

64

Pretty sure it’s installer only. The installer gave me his phone and I did it quite easily, but I’ve not seen the option in the app with my login.

1 Like
65

Installer only, looks like this:

6c0327e7-bbaa-4334-bf0c-a053f70f7e28-1_all_53908
6c0327e7-bbaa-4334-bf0c-a053f70f7e28-1_all_53908640×379 32.3 KB

1 Like
66

I found that a lot of the exceptions in the logs are due to an assumption that there’s a battery attached to the system. When I removed those sensors many went away.

I’ve found that the information from the integration doesn’t match the app, not even close in most cases. I was running HA 2024.12 to support an old integration, so I’ve updated today in the hope that things work better. There’s a bug report with many details here.

I suspect what is happening - and I could be completely wrong here - is the Sig inverter pushes some metrics to its own cloud and knows how to interpret them, and makes the metrics available over modbus. Someone has to work out what all the modbus data means, map it properly to how HA works, and the modbus interface has to be polled regularly because the numbers from the solar can change frequently.

I’ve reset to the default integration code to make sure I don’t remove anything I shouldn’t while I’m working out if it works.

67

The sigenstore battery (Pointguard here in the US) comes with an integrated EMS.
You can set different operating modes for example optimize for self consumption, based on utility rates , or a demand response program integration.
You can configure a backup reserve (%) for you battery. If the battery discharges down to this level, you start consuming from the grid and the battery holds this charge for emergency blackouts. The battery will try to charge up to this backup reserve with solar or from the grid when the grid is restored. Only excess solar is used to charge beyond the backup reserve.

To startup your solar PV inverter during a blackout you also need to keep a small amount of power in the battery. There is a separate user configurable threshold (%) for this typically recommended at 1-5% depending on the size of your battery.

68

In the USA, Sig Energy is rebranded as Pointguard. Has anyone tested this integration with a Pointguard system?

I can confirm the basics are working with a Pointguard battery and loadhub. I haven’t had time to look into the details of each sensor value, but the basics work: battery state of charge percentage, A-B line voltage, grid status etc.
Some sensor values seem wrong or perhaps not applicable.

I have not been able to read the power and energy of the individual smart circuits of the load hub. Does anyone have the modbus addresses for these?

69

I’ve had your 2nd issue a few times, did you find out what was causing it to switch from TOU to EMS?

70

Mine looks like this too. Must be a newer version compared to the documentation in the github. I havent tried yet if it works by assuming the port is 502 like in the github screenshot. Have you got it to work?

71

For me it worked 3 days ago by making the same assumption. Keep the rest of those installer settings on default.

72

Has anybody used the setter “Set Sigen Independent phase power control” ? Unfortunately, the modbus pdf does not explain what this setting does, and the (user) app does not seem to have something in its GUI that resembles that text. So it is not clear to me.
However, i’m assuming by “independent” they mean that the EMS in the inverter does not listen to a Power Sensor at the grid side. Though I have been mistaken before… Am I?

73

That’s good stuff mate! Would you share it at some point? I’m willing to help if you need so :slight_smile:

74

He did: Sig Energy System Integration - #48 by fbradyirl

75

Hi, did you get anywhere with this? I’m surprised more people haven’t commented. I’m seeing the numbers in HA for daily generation are double that reported in the mysigen app.

I’m using this in the energy dashboard.

Sigen Accumulated PV energy production

76

Answering my own question. Pointguard / Sigenergy folks confirmed via e-mail that the realtime usage data of the smart circuits in the loadhub are currently not available via modbus. They are expecting more data to gradually become available after April 2025.

77

Is this all the information that needs to be entered? My system hasn’t been installed yet but the installer didn’t seem to know a lot about it so any info would be useful.

78

My installer had no idea about this, and gave me his phone and I turned on modbus. Then I loaded the integration which was relatively straightforward, the numbers showing are usually within 10% of what the Sig app shows.

2 Likes
79

My Homeassistant Solar Generated figure is generally around 10% higher than the App. Acceptable for my needs.
Export to grid is generally way out, but import from grid is about right.

80

not yey, i hope to start this summer. (as from juin)

81

I have tried to work with that, but I still get about doubled the data than the original MySigen app.

And, I am still confused about the daily settings of the modbus integration here.

I am looking at the data provided at 01:30 a.m. and it still shows me 40 kwh (from the previous day). That should not be on the “today” data, when it does a reset daily.

currently I have thought about to combine the PV1 and PV2 and calculate my own PV total and hope, that this will be more accurate.
But, honestly, I am still struggeling, how to get that right using the calcuation options with HA.