APS Green Choice ProgramsWays to save electricity and reduce your bill

GREEN CHOICE

Energy Efficiency, Renewables, and Green Building in Housing Programs

September 16, 2008

Rex SteppAPS Customer Information & Programs

Phoenix Home Energy Usage

Lighting3%

Air Conditioning39%

Space Heat9%

Dryer7%

Cook5%

Misc9%

Water Heat20%

Refrig.8%

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

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%

APS Duct Test & Repair

Why is it important to fix duct leaks?On average 15% of cooling is leaked through ducts

Use ¼ the energy of an incandescent light bulbSaves 75% on customers lighting costs ($30/bulb)Last up to 10 times longerEnvironmental benefitsKeep your home cooler in summerWide variety of CFL types afford same/better light

Compact Fluorescent Lighting

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……

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

Solar Energy

Solar Energy

Solar Resources

Abundant – 300 days of sunshine a year

Intermittent but predictable

Photovoltaic & Solar Thermal

Solar Energy

200 600 1,000 1,400 1,800 2,200 2,600 3,000

Wavelength (nm)

Pow

er D

ensi

ty (W

/m2 )

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.

PhotovoltaicConverts 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.

Solar ThermalFocusing 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.

Solana Solar Generation Station

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

APS Solar Incentives

Residential Systems: Residential: up to $3.00/wattOff Grid: up to $2.00/watt

Contact: renewables@aps.com

Incentives for Photovoltaic Installations

APS Solar Incentives

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

Incentives for Solar Water Heaters

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 deviceImpair the functioning of the deviceRestrict its useAdversely 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/

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:

Percentage Option – Choose a specific percentage of usage to come from renewable resources (charged $0.01 premium per kWh).

Purchase green power in 100 kWh blocks @ $1.00 per block

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!

What You Can Do…

Change to renewable electricity

by signing up for Green Choice Rates.

What You Can Do…

Take advantage of APS solar incentives & tax

credits to install solar at your home or business.

A better tomorrow starts today