> 400-800 kWh/year savings

The average all-sector U.S. price per kWh is 13.20 cents (source: https://www.eia.gov/electricity/monthly/epm_table_grapher.ph...). Even at the high end that’s a savings of $105.60/year, or $8.80/month.

The U.S. poverty line for 2025 is $15,650 for a single person (source: https://aspe.hhs.gov/sites/default/files/documents/dd73d4f00...). $105.60 is less than one percent of that.

Sure, energy efficiency is great and I would rather have $105.60 than not have it, but it doesn’t really matter in the grand scheme of things.