> 2) It's extremely difficult to bill things like fractional electricity Electricity metering is a solved problem, simply put all the office receptacles and li

> 2) It's extremely difficult to bill things like fractional electricity Electricity metering is a solved problem, simply put all the office receptacles and lights on a single circuit and use a CT (current transformer) and a 120v submeter [0] to record energy usage. Landlords use these for tenant energy monitoring and billing in commercial real estate. [0] https://www.leviton.com/en/products/1n120-1d https://www.leviton.com/en/products/1n120-1d Honeywell even makes a 25A model under the name Emon Dmon: https://prod-edam.honeywell.com/content/dam/honeywell-edam/hbt/en-us/documents/literature-and-specs/datasheets/hbt-bms-E-Mon-Class-1000-Meter-Data-Sheet-38-00064.pdf https://prod-edam.honeywell.com/content/dam/honeywell-edam/h...