Energy Efficient Full Featured Firewall Build Sophos XG, Pfsense, OPNsense

I got this little Intel Atom based server from a customer. It used to be a Asterisk based phone system. Intel Atoms are very energy efficient CPU's. This setup would be good for home or small business use. I've installed and programmed hundreds of firewall from every manufacturer. My favorite Linux based firewall is Sophos. Disable all unnecessary peripherals in the bios. I was able to get this firewall down to 20 watts. My SSD based i3 pulls 30 watts. Where I live and my current power consumption 10 watts is about $2-$3 and month
Dual Network adapter
https://www.amazon.com/gp/product/B08GCFKSLX/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B08GCFKSLX&linkId=6623c79070586f5f5ae1d793166956d1
Android Based Power Meter
https://www.amazon.com/gp/product/B071KXNDW7/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B071KXNDW7&linkId=de9fe31963e7a9a1fd8a465e06ba6e6a