My outdoor kitchen has a 6 gallon under sink hot water heater. It normally consumes 1.3kW at 1:30 duty cycle, so 1.04kWh/day. Yesterday morning it started to cycle on much more frequently…maybe a 4:10 duty cycle, thus 12.48kWh/day. I investigated and found the water heater leaking maybe half a gallon of hot water a minute into the drain under the outdoor sink. At an average of $0.25/kWh, this increase in electricity usage is $86/month. The water leak itself is 21600 gallons/month. Thank you Sense for helping me find this problem quickly; I may not have noticed otherwise until mid-Spring.