Sustainability Performance: At a glance (31 March 2012) - Safaricom

Energy Security
How we performed
The following tables detail our electricity and diesel consumption for the 2011/2012 financial year.
Electricity
Facilities Network
BTSs MSRs
Megawatt Hours (Mwh) 8 538.8 78 040.52 31 653.46
Gigajoules (GJ) 30 739.68 280 945.88 113 952.47
Diesel
Facilities Network
BTSs MSRs
Volume (Litres) 244 518 7 345 436.52 834 608.88
Gigajoules (GJ) 8 866.08 266 341.23 30 262.43
* The buildings data is based on monthly bills received from KPLC and includes Safaricom Headquarter I and II and the
Jambo Contact Centre, but excludes the Safaricom Care Centre (SCC), which is measured as part of the Technical Network
electricity consumption.
Benchmarking energy performance
As this is our first sustainability report, no formal benchmarks
have yet been established for our energy performance. One
of our overall objectives in financial year (FY) 2013 is to
improve efficiency in diesel and electricity consumption In
FY 2013, we will also establish energy performance baseline
data that can be used to benchmark us against other
Vodafone companies going forward.
Other initiatives
Other initiatives under trial include: biofuels, hydrogen fuel cells and grid extensions
(Safaricom constructs up to 6km of power lines in off-grid areas to substantially
reduce generator running hours). These trials will be reported on at the end of the
current financial year.
Lighting the way
LED lights are currently being installed at the Jambo Call
Centre in Mlolongo, all future retail shops will incorporate
LED lighting and, in existing retail shops, a phased
replacement of the existing incandescent fluorescent
lamps will be implemented in the new financial year. By 1
April 2013, all retail shops will be lit using LED lights.
Facilities energy management initiatives
Digital Addressable Lighting Interface
Safaricom House II has had the latest Digital
Addressable Lighting Interface (DALI)
installed. The DALI adjusts the lighting levels
in the main work areas based on the intensity
of external lighting, optimising lighting power
consumption throughout the building.
LED Lighting
LED lighting has been installed
in all the main administration
facilities, resulting in a substantial
40% reduction in energy
consumed. Plans are in progress
to install LED lighting in all retail
shop facilities during the next
financial year.
Network energy management initiatives
Immediately after deployment, the network-related energy efficiency initiatives described below had the cumulative effect of reducing
the running hours (and carbon emissions) of our diesel generators by approximately 67%.
Power Management Units (PMUs)
By stabilising the quality of grid supply (reducing voltage
fluctuations, conditioning voltages, isolating bad power,
regulating under and over-voltages, regulating generator
running and monitoring battery condition) these reduce
unnecessary generator running and diesel consumption.
Auto Phase Selectors (APS)
Similar to the PMUs, these
check voltage phases
and isolate unhealthy grid
phases, delaying generator
running in case voltage
tolerances are not met.
Merged Electrical Systems
Previously, the power supplied
to Safaricom Houses I and II was
supported by different electrical and
generator systems. By integrating
these systems, we have been able to
achieve reduced generator running
hours, lower exhaust emissions and
reduced diesel consumption.
Building Management System
Jambo Contact Centre, Safaricom Care
Centre and Safaricom House II feature a fully
integrated building management system,
incorporating occupation-based lighting and
air-conditioning control. The system has
enabled the company to monitor and control
building systems, increasing energy efficiency.
Automatic Voltage Regulators (AVRs)
These stabilise input voltages and are ideal for sites
with very high and very low voltages.
Vanadium Redox Batteries
Switching from Lead Acid
batteries to these high-cycle,
deep-discharge batteries
also significantly reduces
generator running hours and
diesel consumption.
Energy Security
Power Factor Correction Banks
Office and administrative facilities
have had power factor correction
banks installed as part of the
electrical system. This ensures
efficient delivery of power and that
Safaricom only draws from the
national grid the actual load it utilises.
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