Adding running total for carbon emissions

[mdeakin99]

I have been trying to get calculate electrify carbon intensity for a while so the recent addition of carbon intensity into predbat is EPIC!

I can see predbat.carbon_today which i will use to ahow carbon for today (which i assume is reset at midnight every night).

Could we either

A) Add a running total, similar to predbat.savings_total_predbat that I can reset at the beginning of 2026 maybe and track overall carbon emissions (for energy)

B) Is there a way I can use predbat.carbon_today manually to have a runnning total for the month, year, forever. I have tried doing this myself with Utility meters but they don’t accept negative values. Could I now use predbat.carbon_today or does the fact it resets create a problem?

Thanks for adding carbon. It’s brilliant!

Use Case

I want to track daily, monthly, yearly and running total for co2 emissions (energy wise)

[gcoan]

B) Is there a way I can use predbat.carbon_today manually to have a runnning total for the month, year, forever. I have tried doing this myself with Utility meters but they don’t accept negative values. Could I now use predbat.carbon_today or does the fact it resets create a problem?

I think you need predbat.carbon_total. Utility meters are great when you have a total figure and want to then get (in effect) a sub total that resets every month/day/week or whatever, but they don't accumulate a daily figure

I did a search for other solutions:
https://community.home-assistant.io/t/getting-totals-by-day-from-a-daily-incremental-sensor/630497/

and this one does it with template sensors to add today into total:
https://community.home-assistant.io/t/calculate-cumulative-total-sensor-from-daily-total-sensor/335275/