Short Answer: MAISY RECS whole building and end-use hourly kW loads
include actual household end-use loads while DOE/NREL published loads include average
or curated loads that ignore kW random
load variations that are important in analysis and planning scenarios.
MAISY RECs whole building and end-use hourly kW loads are based on a
nearest neighbor machine-learning process that matches RECS household characteristics with household characteristics
in the MAISY End-Use Hourly Loads Database consisting of more than 230,000 actual end-use
daily hourly loads. DOE/NREL hourly loads typically reflect average or engineering-based
loads that ignore the random nature of end-use loads in actual households. Random
variations in actual loads in MAISY RECS Databases can reflect more than
twice the hourly kW demand and demand variation significantly changing daily
load profile characteristics.