Power
Saver™ Program
Solar Photovoltaics—Frequently Asked Questions
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| How does a solar system generate electricity? |
| A solar energy system generates electricity through the use of photovoltaic (PV) technology. PV turns the suns light energy directly into electric energy. Learn more about solar energy systems (pdf) >> |
| How do I use the electricity from my solar energy system? |
| The electricity generated by a solar energy system works just like the electricity delivered by Austin Energy. After passing through a component called an inverter, the direct current (DC) electricity generated by the solar panels is converted to alternating current (AC), the type of electricity that you access through the outlets in your home. |
| Will a solar
energy system produce enough energy to handle all my electricity
needs? |
| For the average Austin Energy residential
customer, a solar energy system will produce 10% - 40% of their
annual energy needs. System size impacts production. The
size of system that is right for you depends on how big
of an investment you want to make and how much un-shaded
roof space is available. Also, the rebate cap is $13,500,
so the largest solar system Austin Energy will fund is
approximately three (3) kilowatts. |
| How much
electricity will my solar energy system produce? |
The amount of electricity generated
by a solar energy system is dependent upon several factors,
primarily system size, orientation of the system and
shading. Typically, a solar system using 120 square
feet of solar panels will generate 1,000 - 1,440 kWh
per year. |
| Do I need to be connected to the grid? |
Yes. To qualify for an Austin Energy solar energy rebate you will need to be connected to the grid. While you generate the bulk of your own electricity during the peak hours of daylight and demand, your utility will seamlessly take over and continue to supply your electricity at night and on very cloudy days. If you decide to include battery storage, the additional cost for the battery system will not be covered by the rebate. |
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Purchasing and Installing a Solar
Energy System
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| How will I know if my solar energy system is working? |
Since solar technology is motionless
and noiseless, a meter is required to keep track of
how much electricity your system is producing. The inverter
display can show you how much power is produced at any
given time. Also, if the disc on your solar meter is
rotating, your solar system is generating. |
| What happens during an electric outage? |
In any type of electric outage, only a solar energy system with battery backup will continue to have power. By law, any solar energy system without battery backup must shut down until utility power returns. |
| How durable is a solar energy system? |
Solar energy system modules have passed
a standard set of tests for durability and are built
to withstand winds of up to 125 miles per hour and 1-inch
hail. |
| Will I need
approval from my homeowners association? |
If there are covenants and restrictions
in your neighborhood with regard to solar energy systems, you
cannot receive an Austin Energy solar rebate unless
the homeowners association approves your solar energy system
installation. |
| Can I add
battery backup at a later date? |
Yes. If you start with some battery
backup, it is easy to add more. However, if you start
without a backup, it will be rather expensive to add
batteries due to the high cost of adding a different
type of inverter. Systems without battery-backup use
a different inverter than those with battery backup.
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| How long
will it take to install? |
It will typically take two to three
days for a professional installation for a home. For
commercial installations, consult your solar installer. |
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Operational Performance and Quality
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| What happens at night? |
Since solar energy systems require sunlight to produce electricity, your system will not produce at night. Austin Energy will continue to supply your electricity at night unless you purchase a system with a battery backup. |
| What happens on cloudy days? |
Since solar energy systems require sunlight
to produce electricity, the bulk of your electricity
production will take place under sunny conditions. Output
is directly proportional to the amount of sunlight available
at any given moment. A system can generate 50 - 70%
of its typical output under bright overcast conditions
but production will continue to diminish as less light
reaches the system. |
| In what temperatures will a solar energy system operate? |
Solar energy ystems typically operate
in temperatures ranging from -13 to 122 degrees Fahrenheit.
Solar energy systems are electronic devices that generate electricity
directly from sunlight. Output drops off as the system
gets hotter. In summer months, the increased daylight
hours increases production. |
| What is the warranty on a solar energy system? |
Solar energy system modules typically carry
20-30 year warranties. Your system inverter typically
carries a 5-year warranty. The Austin Energy Solar Rebate
program requires that all solar energy systems installed carry
a 5-year warranty from the manufacturer and installer.
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| Will a solar energy system work with
my home? |
To have a solar energy system installed
on your roof, your property must have a reasonable amount
of non-shaded, unobstructed roof space during the key
sun hours of the day. A southern orientation is ideal
but east and west facing roofs can still capture over
80% of the power of a true south-facing roof. Your roof
may be flat or sloped. Rack-mounted systems on the ground
and pole mounted systems are also available. |
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Economics of a Solar Energy System
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| What is Net
Metering? |
If a solar
energy system produces more power at any given moment than
the property consumes, the extra power will flow into
the Austin Energy electric grid. Over any month when a solar energy system
sends more power into the Austin Energy grid than the
homes takes from the grid, the difference or net will
result in a credit on the customer's electric bill.
The credit will be determined by multiplying the net
kilowatt-hours (kWh) of electricity fed into the grid
times the current fuel charge, or Green Choice rate for Green Choice customers.
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| What incentives
are available to Austin Energy customers that will lower
the price of my solar energy system? |
Austin Energy is offering residential
and commercial customers a $4.50/watt rebate for solar
energy systems. |
| Are there
federal incentives for installing a solar energy system? |
Commercial customers may also qualify
for the following federal incentives:
1) Federal Business Investment Tax Credit for Qualifying
Energy Property
2) Federal Modified Accelerated Cost Recovery System
Visit
the U.S. Department of Energy, Office of Energy Efficiency
and Renewable Energy for federal incentives information. |
| Who will
help me apply for the Austin Energy Solar Rebate? |
| Your Austin Energy Participating Solar Installer
will assist in the rebate application process to secure
these rebates for you. |
| What size
system should I get? |
The size you choose is a trade off
between the amount of money you want to invest and the
amount of electricity you want to produce. A typical
Austin home during peak electricity usage in the summer
uses up to 5 kW of electricity at any given moment.
Over a year, that same home will use approximately 12,000
kWh of electricity.
You can look at your old electricity bill to calculate
how much electricity your home typically uses. But remember,
you do not need to cover all your electricity needs
with a solar system to add value to your home.
The only other condition in deciding proper system size
is the amount of suitable space available on your roof.
To be suitable, you must have unobstructed, non-shaded
roof area, either flat or a sloped, at an orientation
other than North. You need roughly 120 square feet of
roof space for each kWh kW that you wish to produce.
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| How much
does a solar energy system cost? |
The total cost for purchasing and
installing a solar energy system is based on the size of system
you require and the specific details of the layout of
your property. Solar energy systems often range in cost from
$6 - $10/watt. |
| How do I
purchase a solar energy system? |
An Austin
Energy participating company
must be used to install your solar energy system. To help you
get the best price, Austin Energy encourages you to
get more than one quote. |
| Can I increase
the size of my solar energy system at a later date? |
Yes, provided you have the available
roof space. |
| Can I apply
for another rebate? |
Yes. The maximum rebate per resident is capped at 80% of invoice cost or $13,500 per City of Austin fiscal year—October to September—for each customer site. |
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Power
Saver™ Program—Saving Energy Together
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