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MEPS − Televisions April 2005
Page 13
A study produced for the Energy Efficiency and Conservation Authority by
Wise Analysis Ltd
4 Energy Consumption
4.1 Household Energy Consumption
The impacts of policies to improve the efficiency of televisions is based largely on future sales
of TVs, and changes to the efficiency of these technologies over the next 15 to 20 years given
current life expectations of these appliances of seven years.
Energy consumption in New Zealand households has been surveyed since 1997 by BRANZ for
EECA in its Household Energy End-use Project (HEEP)
8
. Using data from HEEP the total
annual energy consumption of all televisions in New Zealand is estimated to be lie between 70
and 325 GWh.
The usage data for TVs in NZ has been surveyed by BRANZ
9
but the data is inconclusive. For
the purposes of this report, an average of 4 hours in-use and 20 hours standby a day has been
assumed. Second and subsequent TVs usage is 50% of the principal TV.
The energy consumption is estimated as follows:
Average power usage (in use) = 80W
Standby = 6W
Usage: Watching = 4 hours/day
Standby = 20 hours/day
Average energy usage per day = (20 x 6) + (4 x 80) Wh
= 440 Wh
Total population of TVs = 2,785,600
Average total energy per year (344 days) = 422 GWh
Note: 344 days is the commonly used figure for number of days used, and assumes 21
days of out of home vacation.
The figure of 422 GWh assumes that the entire number of TVs in New Zealand of 2,785,600 is
used in the same way for a certain number of hours per year, as above. However if only the
principal TV in a household with one or more TVs is considered to have the stated usage, i.e. a
total principal TV population of 1,463,900 then this figure drops to 221 GWh. Energy usage
thus falls within the range from 221 to 422 GWh. A more realistic usage assumption is that the
8
Stoecklein A., Pollard, A., Isaacs, N. (ed), Ryan, G., Fitzgerald, G., James, B., & Pool, F. 1997 Energy Use in New Zealand Households:
Report on the Household Energy End-use Project (HEEP) – Year 1. Energy Efficiency & Conservation Authority (EECA), Wellington.
9
Stoecklein, A. Pollard A., Isaacs N., Bishop S. and James B., Energy end-use and socio/demographic occupant characteristics of New
Zealand households, Conference paper CP52, 1998 http://www.branz.co.nz/branzltd/publications/pdfs/con52.pdf
Summary − TV demographics
The total number of TVs in New Zealand is around 2,785,600 with overall television
penetration is around 98%. Television ownership is now in excess of 1.86 televisions per
household and increasing slightly. The TV market is dominated by three major suppliers
−
Sony, Philips and Panasonic. Slimline TVs are increasing their market share with almost a
doubling of sales between 2003 and 2004. If CRT widescreens are included, there was
probably a trebling of this sector.