⚡ HowTo: Set Up Energy Dashboard with SAJ H2 Modbus Integration

[stanus74]

Requirements:

Ensure the following energy sensors from the SAJ H2 integration are available in Home Assistant:

Electricity grid:

• sensor.saj_sum_all_phases_feed_in_total (Grid consumption)
• sensor.saj_sum_all_phases_sell_total (Grid return/export)

Solar panels:

• sensor.saj_total_power_generation (Total solar production)

Home battery storage:

• sensor.saj_battery_total_discharge (Battery discharge)
• sensor.saj_battery_total_charge (Battery charge)

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1. Open the Energy Dashboard

Go to Settings → Dashboards → Energy in Home Assistant.
Click “Start setup” (if new) or “Edit” to configure sources.

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2. Assign Energy Sources

🔌 Grid:

• Grid consumption → select sensor.saj_sum_all_phases_feed_in_total
• Return to grid → select sensor.saj_sum_all_phases_sell_total

☀️ Solar:

• Solar production → select sensor.saj_total_power_generation

🔋 Battery:

• Battery discharge → select sensor.saj_battery_total_discharge
• Battery charge → select sensor.saj_battery_total_charge

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3. Enabling Disabled Sensors (if missing)

If a required sensor does not appear in the Energy Dashboard dropdown, it might be disabled. To enable it:

1. Go to Settings → Devices & Services → Entities
2. At the top, click Filter → Status, and check "Disabled" to show all inactive sensors
3. Click the icon next to the search bar (three lines with a checkmark) to enter Selection Mode
4. Use the checkboxes to select the sensors you want to enable
5. Click "Enable" at the bottom and confirm
6. Optional: In the sensor details view, set them to “Always active”

After enabling, return to the Energy Dashboard setup. The sensors should now appear in the dropdown menus.

[pizzulicchio]

Hi,
for my inverter i have changed :

Electricity grid:

sensor.saj_sum_all_phases_feed_in_total (Grid consumption)
sensor.saj_sum_all_phases_sell_total (Grid return/export)

to

feed_in_total_energy (Grid consumption)
sell_total_energy (Grid return/export)

All values of type "sum_all_phases" are unavaiable on my inverter : SAJ-HS2-5K-S2-X

[stanus74]

ℹ️ Sensor Availability Notice

Important: Some SAJ inverter models or firmware versions may differ in which Modbus registers they provide.

This means that sensors like sum_all_phases_* might be unavailable on certain devices. This is not a bug in the integration, but rather a limitation or variation in the Modbus implementation by SAJ.

⚠️ I do not receive official support from SAJ and rely on a Modbus protocol document from 2022.
Therefore, I cannot guarantee support for all models or firmware versions.

💡 Before reporting an issue, please check:

• Is the integration up to date?
• Have you tried a complete reinstall? This often resolves sensor issues.
• Are the missing sensors simply disabled? (Settings → Devices & Services → Entities)

🔍 If problems persist, please include your inverter model, firmware version, and debug logs.
Your feedback helps improve support for more models over time.

[msaflund]

Please note that the sensor sensor.saj_total_power_generation has a misleading name. It represents the total generation from PV1 only. If you have a second set of panels, PV2, you need to add also the sensor sensor.saj_total_pv_energy_2 to Solar production.
Thanks for providing an excellent integration!

[jeffmeager]

I have a H2-10K-T3-AU model and sensor.saj_total_power_generation is 0, but yet I'm generating solar power. I have tried using the sensor.saj_inverter_total_power_generation but this includes power generated by converting battery storage to power as well, so that's not useful. Does anyone know why total_power_generation would be 0? I've looked for other sensors/entities and there is nothing alternative I found to use. Help appreciated.

[UDicke]

You can create an integral sensor for the energy generated and use it in the energy dashboard. I did this for PV1 and PV2 because I wanted the values separated.

[jeffmeager]

Thank you! That was exactly what I needed. Newbie here, thanks for the support

[bierma1966]

sensor.saj_pv_power

[jeffmeager]

unfortunately that sensor is a dynamic sensor and can't be used

That sensor works for the solar production power (though I'm using one from MQTT for that called SAJ Realtime PV Power). I still don't have anything I can use that provides the cumulative value for just solar PV as this is blank sensor.saj_total_power_generation

[oisyn]

I don't even have a sensor named total_power_generation. It's weird that they do exist for PV2 and PV3 (both disabled by default, total_pv_energy_*), but not for PV1 nor the accumulation of all. But if I enable it, PV2 is still 0, even though I have both PV inputs connected.