Add Solar Generation to WeeWX

[gary....@gmail.com]

I have solar, no storage, and would like to see the solar generation data in WeeWX.

The install uses Envoy for metering and I have the data going into Home Assistant via their API. I have some other sensors attached to HA and have those feeding CO2 and PM 2.5 to weewx via MQTT currently.

 Primarily, out of the 20+ data points, I'd only like to display current solar production, current consumption, current net consumption (utility - solar).

I don't really see a need to store the data.

Should I extend the schema, add a solar database, or repurpose unused existing database fields?

Thanks for any ideas

[steepleian]

I have done something very similar to this by using SolarAssistant which polls my inverter every 5sec. SolarAssistant has a built-in broker which I subscribe to and inject the data into my WeeWX loop stream. From there I can display the live data on my WeeWX dashboard also archive to the database. From there Cheetah is generating a json data series to display  charts and an energy dashboard. It looks like you almost there as you are already receiving air quality data from HomeAssistant via MQTT.

You can see this happening on the link below.

https://claydonsweather.org.uk

On 12 Mar 2026, at 14:08, gary....@gmail.com <gary....@gmail.com> wrote:



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[Jimi Lawson]

@ steepleian

Your link loads an incomplete page on both Chrome & Firefox 

[Ian Millard]

Very strange, it loads fine and complete for me on any browser. Whereabouts are you viewing from?

On 12 Mar 2026, at 16:00, Jimi Lawson <jimi....@gmail.com> wrote:

@ steepleian

Your link loads an incomplete page on both Chrome & Firefox <Screenshot 2026-03-12 155947.png>

To view this discussion visit https://groups.google.com/d/msgid/weewx-user/84f0dd7a-f344-432e-92da-be32f1e3595an%40googlegroups.com.
<Screenshot 2026-03-12 155947.png>

[Jimi Lawson]

@steepleian

Very odd, just checked and it's loading OK now. I'm in the Kingdom of Fife, must have been a glitch in the matrix 😉

[gary....@gmail.com]

I see, Did you extend the database or something else?

SolarAssistant doesn't look like it's compatible with my Envoy setup.

[steepleian]

I created a separate database as I have many customisations but I could have alternatively extended the default database.

 

Sometime ago I came across a WeeWX service extension which read data from HomeAssistant which I adapted to read solar data. I no longer use it but I will look back to see if I still have it in my collection of useful bits and pieces.

On 14 Mar 2026, at 22:04, gary....@gmail.com <gary....@gmail.com> wrote:



To view this discussion visit https://groups.google.com/d/msgid/weewx-user/a9e97291-d08b-4805-bc19-7fa38560774en%40googlegroups.com.

[gary....@gmail.com]

Cool, sounds good if you can find it. However the HA>MQTT>WeeWX method is ok and I just wanted to see if I should extend the database. For me, it sounds like for the few data points I want to display, no need for anything more.