This document summarizes several of APS's Green Choice programs that help customers save energy and reduce their bills. It discusses how heating and cooling account for about half of the average residential bill and presents options for making air conditioners and ducts more efficient. It also promotes compact fluorescent lighting and solar energy incentives. Customers can choose to purchase renewable energy through Green Choice rates or install solar panels with APS incentives.

1. APS Green Choice Programs
Ways to save electricity and reduce your bill
Energy Efficiency, Renewables, and
Green Building in Housing Programs
September 16, 2008
Rex Stepp
APS Customer Information & Programs
GREEN CHOICE

2. Phoenix Home Energy Usage
Refrig. Lighting
8% 3%
Water Heat
20% Air Conditioning
39%
Misc
9%
Cook
Dryer Space Heat
5%
7% 9%

3. Cooling is the key
Heating/cooling is about half the average
annual residential bill
It’s the most variable part of the bill
It gives us the most potential for savings

4. Efficient Air Conditioning
How much can High Efficiency AC Save?
New electric heat pumps and AC units are about 40 to
50% more efficient than units installed 15 years ago
Replacing a 7 SEER unit with a 16 SEER unit can
reduce the cooling portion of your electric bill up to
50%

5. APS Duct Test & Repair
Why is it
important to fix
duct leaks?
On average 15%
of cooling is
leaked through
ducts

6. Compact Fluorescent Lighting
Use ¼ the energy of an incandescent light bulb
Saves 75% on customers lighting costs ($30/bulb)
Last up to 10 times longer
Environmental benefits
Keep your home cooler in summer
Wide variety of CFL types afford same/better light

7. Solar Energy
• The energy we get from our sun is the
result of nuclear fusion reactions.
• Our sun is made up of hydrogen which is
gradually being converted into helium.
• In fact……

8. Solar Energy
1. Every second in our sun, 657 million tons of hydrogen are converted
to 653 million tons of helium through the process of nuclear fusion.
2. The “missing” 4 million tons of mass are converted to heat
and light energy through Einstein’s E=MC2 equation.
3. The 4 million tons of “energy” are radiated
out in all directions from the sun into space.
4. The earth collects a mere 4 lb
of this energy.
5. But this is enough to support
life on earth as we know it.
_______________
©CME - LLC

9. Solar Energy

10. Solar Energy
Solar Resources
Abundant – 300
days of sunshine a
year
Intermittent but
predictable
Photovoltaic &
Solar Thermal

11. Solar Energy
Approximately ½ of the power in the
solar spectrum lies in the visible light
area.
The remaining ½ is in the infra-red or
“heat” area.
Power Density (W/m2)
200 600 1,000 1,400 1,800 2,200 2,600 3,000
Wavelength (nm)

12. Photovoltaic
Converts Sunlight Directly into Electricity
A photovoltaic cell consists of an unstable compound – usually silicon mixed
with other elements – sandwiched between two conductors. Photons of
sunlight knock the electrons loose from the silicon atoms, which are then
captured by the conductor.

13. Solar Thermal
Focusing Solar Energy onto a Heat Transfer Fluid
Parabolic mirrors focus solar energy onto a heat transfer fluid.
The fluid is used to heat water, creating steam. The steam is
then used to run conventional steam turbines.

14. Solana Solar Generation Station

15. Solana Solar Generation Station
Concentrating
Solar Power (CSP)
with Thermal Energy
Storage
Largest Solar plant
in the world if
operating today
280 MWs enough
for 70,000 homes

16. APS Solar Incentives
Incentives for Photovoltaic Installations
Residential Systems:
Residential: up to $3.00/watt
Off Grid: up to $2.00/watt
Contact: renewables@aps.com

17. APS Solar Incentives
Incentives for Solar Water Heaters
Domestic Solar Water Heater
Heating water can make up to 15% of your
home’s energy costs
$0.75 per expected first year kWh savings
(incentives average around $2,000 but vary
based on the system’s rating)
Contact: renewables@aps.com

18. Res. Solar Installations and HOAs
Senate Bill 1254, Enacted July 2007
Stipulates:
HOAs may not prohibit the installation or use of solar-energy devices
(panels and associated devices).
HOAs may adopt reasonable rules regarding the placement of a solar
device so long as those rules do not:
Prevent the installation of the device
Impair the functioning of the device
Restrict its use
Adversely affect its efficiency
Requires that courts award reasonable attorney fees and costs to any
party who substantially prevails in litigation against an association’s board
of directors as it relates to the provisions. Sources:
www.DSIREUSE.org,
www.azcommerce.com/Energy/

19. APS Green Choice Rates
Customers can choose how much of their usage comes
from renewable resources with Green Choice Rates.
Energy produced from wind & geothermal resources
Two plan options:
Purchase green power in 100 kWh blocks @ $1.00 per block
Percentage Option – Choose a specific percentage of usage to come from
renewable resources (charged $0.01 premium per kWh).

20. What You Can Do…
Learn about ways
you can use your
energy more
efficiently and
lower your bill.
And how incentives
from APS can help!

21. What You Can Do…
Change to
renewable electricity
by signing up for
Green Choice Rates.

22. What You Can Do…
Take advantage of APS
solar incentives & tax
credits to install solar at
your home or business.

23. A better tomorrow starts today