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Solar energy in Home Assistant (lemmy.world)

submitted 2 years ago by yesterdayshero@lemmy.world to c/homeassistant@lemmy.world

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I recently got solar installed at my place and was wondering if anyone had tips on things like:

Using the Energy dashboard effectively
Template Sensors I should set up for energy tracking
Graphs or visualising production/usage in dashboards
Automations that you've used to help save using energy from the grid

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[–] Cpo@lemm.ee 9 points 2 years ago (3 children)

Look up your inverter brand and pray there is an integration for it. Also: try to make your electrical meter smart to be able to tell the difference between pulling from grid and delivering to grid. If you already have a smart meter, see if it exposes some interface (like P1 with the DSMR protocol for example) to easily integrate the meter into home assistant.

I have done all this with a goodwe inverter and a kamstrup meter P1 port using a DSMR dongle.

If you need any pointers, dm me.

[–] yesterdayshero@lemmy.world 1 points 2 years ago (2 children)

Mine has an integration which is handy (enphase). But it doesn't tell me my grid usage. I'm trying to calculate it by taking my total consumption and subtracting my solar production. I think it roughly gives me the right overall number.

The problem is I can't seem to get how much I'm feeding back into the grid. I might be able to work it out with some sort of calculation.

I might DM you about the P1, as it sounds like that might do the job.

[–] ironhydroxide@partizle.com 1 points 2 years ago

I have enphase inverters as well. I don't find their data to be useful.

I went the route of installing two circuit setup boards running esp8266. One is installed in the subpanel in the garage where the solar feeds, the other is installed at the main panel on the main cables before any loads.

This way I can more accurately see production and usage. And can tell during production how much I'm actually utilizing before sending residual back to grid.

If I had only one panel and the solar fed directly into it, I'd use one of the 6 channel circuitsetup boards instead to monitor both solar feed and main.

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