Table 1 Summary statistics for each house.

House	1	2	3	4	5
Building type	end of terrace	end of terrace		mid-terrace	flat
Year of construction	1905	1900		1935	2009
Energy improvements	solar thermal & loft insulation & solid wall insulation & double glazing	cavity wall insulation & double glazing		loft insulation & double glazing
Heating	natural gas	natural gas		natural gas	natural gas
Ownership	bought	bought		bought	bought
Number of occupants	4	2		2	2
Description of occupants	2 adults and 1 dog started living in the house in 2006. One child born in 2011. Second child born in 2014.	2 adults. 1 at work all day; the other sometimes home		1 adult and 1 pensioner	2 adults
Total number of meters	54	20	5	6	26
Number of site (mains) meters	2	2	1	1	2
Sample rate of mains meters	16 kHz & 1 Hz & 6 s	16 kHz & 1 Hz & 6 s	6 s	6 s	16 kHz & 1 Hz & 6 s
Date of first measurement	2012-11-09	2013-02-17	2013-02-27	2013-03-09	2014-06-29
Date finished installing all meters	2013-04-12	2013-05-22
Date of last measurement	2015-01-05	2013-10-10	2013-04-08	2013-10-01	2014-11-13
Date when some meters were removed					2014-09-06
Total duration (days)	786	234	39	205	137
Total uptime for mains meter (days)	655	140	36	155	131
Uptime proportion	0.83	0.60	0.93	0.75	0.96
Average mains energy consumption per day (active kWh)	7.64	7.17			13.75
Average mains energy consumption per day (apparent kVAh)	8.90	8.00	12.35	10.24	17.56
Following statistics calculated when all meters installed
Correlation of sum of submeters with mains	0.96	0.86	0.47	0.55	0.90
Proportion of energy submetered	0.80	0.68	0.19	0.28	0.79
Mean dropout rate (ignoring large gaps)	0.02	0.02	0.02	0.02	0.02

‘uptime’ is the total time that the system was active and recording. The ‘total duration’ is ‘date of last measurement’ minus ‘date of first measurement’. The correlation of the mains meter with the sum of all submeters gives an indication of how much of the variance in the mains signal is captured by the submeters. The proportion of energy submetered is the total energy captured by the submeters divided by the total energy captured by the mains meter. The dropout rate (ignoring large gaps) gives a measure of the rate at which packets were lost due to radio errors (large gaps are ignored because these are often caused by a meter being deliberately unplugged). Some metadata is not available because the occupants are no longer contactable.

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