• Know Your Rights

    Arizona law protects individual homeowners’ private property rights to solar access by dissolving any local covenant, restriction or condition attached to a property deed that restricts the use of solar energy. This law sustained a legal challenge in 2000. A Maricopa County Superior Court judge ruled in favor of homeowners in a lawsuit filed by their homeowners association seeking to Read more
  • Agua Caliente PV Power Plant Among World’s Largest

    The Agua Caliente solar farm near Yuma features First Solar’s thin-film cadmium-telluride (CdTe) solar modules. Located 65 miles east of the city of Yuma, Arizona, this plant is one of the world’s largest operational PV power plants with 290MW (AC) connected to the electricity grid. Read more
  • Solar Hot Water

    There are two types of solar water heating systems: active, which have circulating pumps and controls, and passive, which don't. The typical solar water heater is comprised of solar collectors and a well-insulated storage tank. The solar collector is a network of pipes that gathers the sun's energy, transforms its radiation into heat, and then transfers that heat to either Read more
  • Federal Residential Renewable Energy Tax Credit

    (Information provided by DSIRE - Last reviewed 02/19/2009) Incentive Type: Personal Tax Credit State: Federal Eligible Renewable/Other Technologies: Solar Water Heat, Photovoltaics, Wind, Fuel Cells, Geothermal Heat Pumps, Other Solar Electric Technologies Applicable Sectors: Residential Amount: 30% Maximum Incentive: Solar-electric systems placed in service before 2009: $2,000Solar-electric systems placed in service after 2008: no maximumSolar water heaters placed in service before Read more
  • Solar Building Design in Arizona

    The idea of using the sun to meet the energy needs in our buildings has been with us since the time of the Greeks, with some of the design manifestations even evident in the prehistoric structures of Arizona and the Southwest. There is a great historic tradition for Arizona buildings that utilize our most abundant resource, and the current increases Read more
  • How Not to- Battery Connections

    Photo shows the situation after a battery discharge test at 300 amps was terminated on a 1530 AH IBE battery string when one post melted. During the discharge test all cell voltages are logged. The sum of the cell voltages was 2.73 volts lower than the 48-volt string voltage. This is an average of 118 mv per inter-cell connection, 5-10 Read more
  • 1 Know Your Rights
  • 2 Agua Caliente PV Power Plant Among World’s Largest
  • 3 Solar Hot Water
  • 4 Federal Residential Renewable Energy Tax Credit
  • 5 Solar Building Design in Arizona
  • 6 How Not to- Battery Connections

Blogs

  1. Solar Center Blog
  2. Guest Blogs
Geoff Sutton
25 November 2017

In the desert south-west the intense sunshine and long summer days result in uncomfortable and even dangerously high temperatures for about four months.

Jim Arwood
28 December 2016

“A lie gets halfway around the world before the truth has a chance to get its pants on.”  --Winston Churchill


Will add Guest Blog content here
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Some things to pay attention to in Arizona

ASEA REBOOT

The Arizona Solar Energy Association (ASEA), State Chapter of the American Solar Energy Society ASES), will be holding meetings in a follow-up to the-long awaited updated ASES‚  Chapters handbook and directives.

ASES evolution, in response to some problematic economic and operational conditions, has resulted in a hearty and robust context for the present and the future. ASEA is now responding with an appropriate updating, through local and statewide discussion. 

Interim Chair, Andy Gerl, a past ASEA Chair and Board member, is making arrangements for Arizona solar advocates and supporters, members and non-members, to receive both an update re: ASES adaptation and changes, and to discuss solar in Arizona and the “reboot" of the ASEA  context, goals and objectives, within the context of varied renewable energy groups within the State, such as AriSEIA (the solar trade association); various sustainability groups; Green Building organizations; the recently formed solar hot water businesses non-profit entity; research and development at the universities; and others.

For more information about the ASEA Reboot discussions, contact Andy at andrew@blazingsolar.com  or 602-799-5942

APS Rate Case - Higher rates, solar changes now effective as of September 1st

APS customers had until August 31st to submit complete interconnection applications to APS in order to be grandfathered under earlier solar policy.  Basic rates have increased and net metering was eliminated, replaced by a fixed purchase rate that starts at $0.129 per kwhr and will decrease in the future.  Further details are posted in a link below.

Quick APS Links:

News Release (Aug. 15, 2017)
Summary for Residential Customers
Summary for Business Customers
Solar Grandfathering Fact Sheet (also see the note below for additional information)

The Arizona Solar Center has put together an unofficial summary of the new APS rate schedules for new solar customers, click here.

On August 21st APS emailed the following information to Stakeholders (but it does not seem to be on the APS website):

Stakeholders,

The Arizona Corporation Commission (ACC) has approved a decision in our rate review, and we are happy to share some details with you affecting our solar customers. We appreciate your support in delivering this message to customers and will be glad to help you with any questions you may have. For your reference, attached are letters that were sent to customers regarding grandfathering. Other resources are available at aps.com/gosolar.

Grandfathering

  • Current solar customers that are interconnected to the APS grid will remain grandfathered for 20 years from the date of interconnection.
    • The grandfathering stays with the premise. Systems transferred to a new premise will require a new application, and the customer would no longer be eligible for EPR-6.
    • Over the terms of the grandfathering period, a customer may not increase the capacity of their grandfathered solar system by more than a total of 10% or 1 kW, whichever is greater.
  • Customers who submit a complete application by 11:59 p.m. August 31, 2017 will be eligible for grandfathering. The system would need to be installed and have AHJ approval by February 28, 2018 in order to qualify. A complete application includes all of the following:
    • Customer Application
    • Executed Contract
    • Disclaimer
    • Consumer Acknowledgement
    • Installer Application
    • Three Line Diagram
    • Site Plan

Public Meetings:

Green Building Lecture - Economic Value of Green: Knowledge is EmPOWERing

Scottsdale’s Green Building Lecture season kicks off with a panel of industry leaders on the economic value of green. 
 
These free programs run from 7 to 8:30 p.m. on the dates listed below at the Granite Reef Senior Center, 1700 N. Granite Reef Road. RSVPs are not needed.

Green Building Lecture Series

Solar Energy and Battery Storage Systems

Date: Thursday, Dec. 7

Time: 7 - 8:30 p.m.

This is an exciting time for renewables and on-site energy storage systems as solar continues to take off in the valley. Just this year, Scottsdale has had a record year with more than 500 residential solar electric installations and a growing number of battery storage system installs.  

ASU Senior Sustainability Scholar Paul Hirt will discuss the solar energy revolution, why solar is coming faster than anyone expected and how it will change our world. His current research includes a history of electric power, transition to renewable energy, and collaborative interdisciplinary research on water use, urban growth and sustainability.

Titan Solar Power Director of Business Development Jack Walker joins Hirt. He’ll discuss residential battery storage options for utility-connected solar photovoltaics systems. Walker is set to address homeowners’ concerns about time of use rates, controlling demand charges and having a backup system in the event of a utility grid failure. For some homeowners it’s about control over time of use rates, for others it may be about controlling demand charges while for others it may be about having a "back up" system in the event of utility grid failure.

For more information see the 'Next Lecture' section of this link: http://www.scottsdaleaz.gov/green-building-program

The  scheduled lecture series includes:

  • Feb. 1, 2018 – Living an Edible Landscape Life
  • April 5, 2018 – Building with earth and Mass in the Desert 
  • June 7, 2018 – Heating and Cooling with Ductless Mini-Splits

Further information on this worthwhile program

General News feed

Caution- News leads open in new windows. Warning- These news links are automatically generated by others such as Google News and are not reviewed by the Arizona Solar Center, Inc. We are not responsible for link content.

Our Twitter Feed

azsolarcenter "A lie gets halfway around the world before the truth has a chance to get its pants on.” --Winston... https://t.co/YZUiXLzsKz
azsolarcenter The Sun Day Blog: The future is not what it used to be. In the aftermath of the 2016 election, the question has... https://t.co/lSR5RFewJm
azsolarcenter Novermber 5, 2016 -- APS, pro-solar group together spend $6 million on Arizona Corporation Commission races: The... https://t.co/5xyq4EsoFm
azsolarcenter November 3, 2016 Solar Battles Playing Out On Arizona Ballot This Election: It may not be at the top of the... https://t.co/uYSRxv97YR
azsolarcenter November 4, 2016: Utility spends $3.5 million to keep Arizona Corporation Commission all-GOP: The state’s largest... https://t.co/imqk6z2sDU
azsolarcenter October 25, 2016: 42 States (and DC) try to screw with solar The 50 States of Solar Policy Report by the NC... https://t.co/JBYTzpf2ui
azsolarcenter October 24, 2016 -- Future of independent solar energy at stake in Corporation Commission raceL The long-term... https://t.co/D6jy4I5Ci0
azsolarcenter October 13, 2016 -- State policy matters: It is very easy to get distracted by the dog-and-pony show of this... https://t.co/MH7mEMg9MC
azsolarcenter October 16, 2016: Arizona Corporation Commission DebateL Five candidates running for three open seats on the... https://t.co/tm0XLl6CqG
azsolarcenter My Sun Day blog is posted to the Arizona Solar Center. https://t.co/vRrxwSSQpw
azsolarcenter There is No Plan(et) B: Climate change is no longer an issue that our politicians can kick down the road for... https://t.co/KHZzajZc9K
azsolarcenter High Noon: Nearly 40 years ago, President Carter proclaimed the dawn of the solar age. If President Carter was... https://t.co/JmZSHlmBUI
azsolarcenter High Noon: Nearly 40 years ago, President Carter proclaimed the dawn of the solar age. If President Carter was... https://t.co/rBgkaWKDs6
azsolarcenter High Noon: Nearly 40 years ago, President Carter proclaimed the dawn of the solar age. If President Carter was... https://t.co/RzXaQACpPR
azsolarcenter High Noon: Nearly 40 years ago, President Carter proclaimed the dawn of the solar age. If President Carter was... https://t.co/t1fKNTPwIB
azsolarcenter High Noon: Nearly 40 years ago, President Carter proclaimed the dawn of the solar age. If President Carter was... https://t.co/dWEKk3QR6H
azsolarcenter High Noon: Nearly 40 years ago, President Carter proclaimed the dawn of the solar age. If President Carter was... https://t.co/y4vhOpjfh1
azsolarcenter September 29, 2016: To cover a utility's fixed costs, are demand charges or time-of-use (TOU) rates superior?... https://t.co/RgneQWNKyM
azsolarcenter September 25, 2016: Arizona Public Service not only rejected an Arizona Corporation commissioner’s request to... https://t.co/iip6RwoOOS
azsolarcenter September 22, 2016: The Salt River Project (SRP) board of directors has agreed to purchase energy produced by... https://t.co/xYegEuiI43
azsolarcenter September 18, 2016: UniSource Energy officials have shelved plans to use of land surroundingMohave Community... https://t.co/eXmHxo03wQ
azsolarcenter September 13, 2016: The city of Sedona spent about 90 minutes at its September 13 council meeting discussing... https://t.co/LHV2QcsvYt
azsolarcenter September 15, 2016: New solar research projects at Arizona State University will receive $3.75 million in funding... https://t.co/N20NYLWxGy
azsolarcenter September 25, 2016: The parable of the frog and boiling water is hundreds of years old. It has been used... https://t.co/O5PYqvxIJg

Technology Menu

Our technical data is organized into the following categories:

Will Rooftop Solar Really Add to Utility Costs?

By Suma Jothibasu and Surya Santoso

Posted  

Regulations in most states obligate utilities to derive some of their  electricity generating capacity from renewable sources. Unsurprisingly, the most  widely available options—wind and solar—dominate. The International Energy Agency (IEA) estimates that by 2050, solar photovoltaic (PV) power generation will contribute 16 percent of the world’s electricity, and 20 percent of that  capacity will come from residential installations.

By offering local generation, residential or rooftop PV reduces the need for transmission facilities  to move power from large generating stations to distribution substations. But the effect on the distribution grid is less straightforward. The conventional distribution grid is designed for neither two-way power flow nor large generation capacity. So the prevailing thought is that  the grid will need a costly upgrade to accommodate the high PV penetration. Our study within  the Full Cost of Electricity (http://energy.utexas.edu/the-full-cost-of-electricity-fce/) program aims to estimate the cost of maximizing residential PV capacity without any grid impacts. The bottom line? We found  that  even without hardware upgrades to the distribution circuits, such circuits can handle significant solar generation.

We looked at it three ways: Allowing the largest PV generation

1. without making operational changes to the circuit or upgrading the infrastructure;

2. with a few modest operational changes in the equipment already  installed; and

3. with additional infrastructure upgrades such as smart inverters and energy storage.

(Note that  accommodating the first two capacities does not require any integration costs, beyond  some minimal cost associated with the operational changes in the existing  devices.)

Depending on a distribution circuit’s characteristics, the maximum PV capacities it can handle range  from as low as 15.5 percent of the median value of the daytime peak load demand (2.6 megawatts in one particular circuit) to more  than 100 percent (3.87 MW in another circuit). These results suggest that  significant rooftop PV generation can be integrated in the grid with little or no additional  Photo:  Lester Lefkowitz cost to utilities and their  customers and without causing any adverse grid impacts. In fact, our study shows that  at such levels, impacts due to PV generation are either non-existent or can be addressed by appropriate circuit  operational changes.

 

The amount  of a photovoltaic capacity that can be added to a distribution circuit without violating its operating constraints depends on the specific nature  of the system. The minimum hosting capacity, shown as Circuit C, is 15 percent. The maximum hosting capacity with no changes to the distribution circuit, Circuit B, is 104 percent of median daytime peak  load.

In one example, an operational change was able to boost photovoltaic capacity from 15 percent to 47 percent. The PV hosting capacity of the circuit  in that  same  example can be boosted from 47 percent to 80 percent if as many  as one-third of the photovoltaic installations include smart inverter technologies.

Although adding energy  storage would also increase hosting capacity, we find that  the cost of energy storage systems would be significant, and so it is unjustifiable if the sole purpose is to increase PV penetration.

For details of which circuit  characteristics affect photovoltaic capacity, as well as other calculations, read the complete white paper “Integrating Photovoltaic Generation (http://energy.utexas.edu/files/2016/09/UTAustin_FCe_Int_PV_Generation_2016.pdf)[PDF], part  of the Full Cost of Electricity Study conducted by the University of Texas Austin Energy  Institute (http://energy.utexas.edu/). (IEEE Spectrum is blogging about the study  and linking to the white papers as they are released.)

 Suma Jothibasu is a graduate student and Surya Santoso (http://aspires.ece.utexas.edu/bio.html) directs the Laboratory for Advanced Studies in Electric Power and Integration of Renewable Energy Systems, within the Department of Electrical Engineering, Cockrell School of Engineering at the University of Texas Austin.

Original article:

 http://spectrum.ieee.org/energywise/energy/policy/calculating-the-full-cost-of-electricity-rooftop-solar-pv

 

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Wind Energy

Note 1-22-17  These links need checking

Wind-Related Periodicals

About

  • Welcome to the Arizona Solar Center

     This is your source for solar and renewable energy information in Arizona. Explore various technologies, including photovoltaics, solar water heating, solar architecture, solar cooking and wind power. Keep up to date on the latest industry news. Follow relevant lectures, expositions and tours. Whether you are a homeowner looking to become more energy efficient, a student learning the science behind the technologies or an industry professional, you will find valuable information here.
  • About The Arizona Solar Center

    Arizona Solar Center Mission- The mission of the Arizona Solar Center is to enhance the utilization of renewable energy, educate Arizona's residents on solar technology developments, support commerce and industry in the development of solar and other sustainable technologies and coordinate these efforts throughout the state of Arizona. About the Arizona Solar Center- The Arizona Solar Center (AzSC) provides a broad-based understanding of solar energy, especially as it pertains to Arizona. Registered Read More
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