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.

I like knowing my daily production and keeping that on my mushroom dashboard. That's not an ootb metric on my SolarEdge system, but lifetime energy is. So I have an automation that records the total each night into a helper, and a Mushroom Template Chip card that does the math for me. It's simple but it does the job.

type: template content: >- Today: {{(states('sensor.solaredge_ac_energy_kwh')|float - states('input_number.solar_kwh_yesterday')|float )|round(2)}} kWh icon: mdi:chart-line

My solar is going up next week, so I've been experimenting a bit with working it into my current setup. I have import and export data from my smart meter, hourly electricity price from entso-e and a simulated solar production based on the lux reading from my outdoor pir sensors. To get real time production I specced an elko smart tag energy meter on the fuse for the inverter, as the solis is not easy for an amateur to get data out of. I also have smart relay on my water heater, and have been controlling this based on electricity price for a while now. I'm also working on adding the heat pump and bathroom heat, they will be set a couple of degreees lower when power is most expensive, and a couple higher when solar is produsing to "store" heat. Not sure how all this will work out yet so I'll not share the details before I'm sure it works, but I hope it gives som ideas.

For visualizations I use apexcharts, i can fit solar production, consumption and price with and without grid tariff in a single card, althought it's not quite perfekt yet.

I've been enjoying the power-flow-card-plus and energy-flow-card-plus visualizations. I've also set up a custom Grafana graph (HA -> InfluxDB -> Grafana).

I'm following this description of how to get my data from the HTTP API on my Enphase Envoy unit.

I had more success with using my energy monitor sensors than my inverter ones. My inverter (SolarEdge) seemed to have a fairly low refresh rate, and there's also no information on power use.

I have a Sense energy monitor that has real time measurements and instead use that for my dashboard production and usage graph.