Businesses (like factories) that use a lot of electric have HH (half hourly) meters. As you might have guessed, a half hourly meter is an energy meter that monitors the amount of electricity used by a business within a half-hour period. If you’re reading this, you probably don’t; you probably have an NHH (yes, you guessed it, non half hourly) meter which are read manually, or automatically with an advanced meter. It’s good to know, just in case someone asks.