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"I'd put my money on the Sun and Solar Energy, what a source of Power! I hope we don't have to wait until oil and coal run out, before we tackle that." -Thomas Edison

"Solar energy is a clean alternative energy source. It's clear, given the current energy crisis, that we need to embrace new sources of renewable energy that are good for our planet. I believe very strongly in using technology to provide affordable options that all consumers can put into practice." -Yang Yang UCLA Engineering Professor

"We were delighted to have worked with Microsoft on its electric solar system. Microsoft is effectively lowering operating costs, reducing purchases of expensive peak electricity, and improving the health and quality of life in California through its Silicon Valley Campus solar power program." -Dan Shuga President of PowerLight

 

 

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SOLAR INVERTER
ORANGE COUNTY

Internal view of a solar inverter. Note the many large capacitors (blue cylinders), used to store energy briefly and improve the output waveform.

A solar inverter, or converter or PV inverter, converts the variable direct current (DC) output of a photovoltaic (PV) solar panel into a utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-grid electrical network. It is a critical balance of system (BOS)–component in a photovoltaic system, allowing the use of ordinary AC-powered equipment. Solar power inverters have special functions adapted for use with photovoltaic arrays, including maximum power point tracking and anti-islanding protection.

Classification

Simplified schematics of a grid-connected residential photovoltaic power system

Solar inverters may be classified into three broad types:[citation needed]

  1. Stand-alone inverters, used in isolated systems where the inverter draws its DC energy from batteries charged by photovoltaic arrays. Many stand-alone inverters also incorporate integral battery chargers to replenish the battery from an AC source, when available. Normally these do not interface in any way with the utility grid, and as such, are not required to have anti-islanding protection.
  2. Grid-tie inverters, which match phase with a utility-supplied sine wave. Grid-tie inverters are designed to shut down automatically upon loss of utility supply, for safety reasons. They do not provide backup power during utility outages.
  3. Battery backup inverters, are special inverters which are designed to draw energy from a battery, manage the battery charge via an onboard charger, and export excess energy to the utility grid. These inverters are capable of supplying AC energy to selected loads during a utility outage, and are required to have anti-islanding protection.

Maximum power point tracking

Solar inverters use maximum power point tracking (MPPT) to get the maximum possible power from the PV array. Solar cells have a complex relationship between solar irradiation, temperature and total resistance that produces a non-linear output efficiency known as the I-V curve. It is the purpose of the MPPT system to sample the output of the cells and determine a resistance (load) to obtain maximum power for any given environmental conditions.

The fill factor, more commonly known by its abbreviation FF, is a parameter which, in conjunction with the open circuit voltage (Voc) and short circuit current (Isc) of the panel, determines the maximum power from a solar cell. Fill factor is defined as the ratio of the maximum power from the solar cell to the product of Voc and Isc.

There are three main types of MPPT algorithms: perturb-and-observe, incremental conductance and constant voltage. The first two methods are often referred to as hill climbing methods; they rely on the curve of power plotted against voltage rising to the left of the maximum power point, and falling on the right.

Solar micro-inverters

Main article: Solar micro-inverter
A solar micro-inverter in the process of being installed. The ground wire is attached to the lug and the panel's DC connections are attached to the cables on the lower right. The AC parallel trunk cable runs at the top (just visible).

Solar micro-inverter is an inverter designed to operate with a single PV module. The micro-inverter converts the direct current output from each panel into alternating current. Its design allows parallel connection of multiple, independent units in a modular way.

Micro-inverter advantages include single panel power optimization, independent operation of each panel, plug-and play installation, improved installation and fire safety, minimized costs with system design and stock minimization.

A 2011 study at Appalachian State University reports that individual integrated inverter setup yielded about 20% more power in unshaded conditions and 27% more power in shaded conditions compared to string connected setup using one inverter. Both setups used identical solar panels.

Grid tied solar inverters

Solar grid-tie inverters are designed to quickly disconnect from the grid if the utility grid goes down. This is an NEC requirement that ensures that in the event of a blackout, the grid tie inverter will shut down to prevent the energy it produces from harming any line workers who are sent to fix the power grid.

Grid-tie inverters that are available on the market today use a number of different technologies. The inverters may use the newer high-frequency transformers, conventional low-frequency transformers, or no transformer. Instead of converting direct current directly to 120 or 240 volts AC, high-frequency transformers employ a computerized multi-step process that involves converting the power to high-frequency AC and then back to DC and then to the final AC output voltage.

Historically, there have been concerns about having transformerless electrical systems feed into the public utility grid. The concerns stem from the fact that there is a lack of galvanic isolation between the DC and AC circuits, which could allow the passage of dangerous DC faults to the AC side. Since 2005, the NFPA's NEC allows transformerless (or non-galvanically) inverters. The VDE 0126-1-1 and IEC 6210 also have been amended to allow and define the safety mechanisms needed for such systems. Primarily, residual or ground current detection is used to detect possible fault conditions. Also isolation tests are performed to insure DC to AC separation.

Many solar inverters are designed to be connected to a utility grid, and will not operate when they do not detect the presence of the grid. They contain special circuitry to precisely match the voltage, frequency and phase of the grid.

Solar charge controller

A charge controller may be used to power DC equipment with solar panels. The charge controller provides a regulated DC output and stores excess energy in a battery as well as monitoring the battery voltage to prevent under/over charging. More expensive units will also perform maximum power point tracking. An inverter can be connected to the output of a charge controller to drive AC loads.

Solar pumping inverters

Advanced solar pumping inverters convert DC voltage from the solar array into AC voltage to drive submersible pumps directly without the need for batteries or other energy storage devices. By utilizing MPPT (maximum power point tracking), solar pumping inverters regulate output frequency to control the speed of the pumps in order to save the pump motor from damage.

Solar pumping inverters usually have multiple ports to allow the input of DC current generated by PV arrays, one port to allow the output of AC voltage, and a further port for input from a water-level sensor.

Market

As of 2014, conversion efficiency for state-of-the-art solar converters reached more than 98 percent. While string inverters are used in residential to medium-sized commercial PV systems, central inverters cover the large commercial and utility-scale market. Market-share for central and string inverters are about 50 percent and 48 percent, respectively, leaving less than 2 percent to micro-inverters.

Inverter/converter market in 2014
Type Power Efficiency(a) Market
share(b)
Remarks
String inverter up to 100 kWp(c) 98% 50% Cost(b) €0.15 per watt-peak. Easy to replace.
Central inverter above 100 kWp 98.5% 48% €0.10 per watt-peak. High reliability. Often sold along with a service contract.
Micro-inverter module power range 90%–95% 1.5% €0.40 per watt-peak. Ease of replacement concerns.
DC/DC converter
Power optimizer
module power range 98.8% N/A €0.40 per watt-peak. Ease of replacement concerns. Inverter is still needed. About 0.75 GWP installed in 2013.
Source: data by IHS 2014, remarks by Fraunhofer ISE 2014, from: Photovoltaics Report, updated as per 8 September 2014, p. 35, PDF
Notes: (a)best efficiencies displayed, (b)market-share and cost per watt are estimated, (c)kWp = kilowatt-peak

See also

References

  1. ^ Solar Cells and their Applications Second Edition, Lewis Fraas, Larry Partain, Wiley, 2010, ISBN 978-0-470-44633-1 , Section10.2.
  2. ^ "Invert your thinking: Squeezing more power out of your solar panels". scientificamerican.com. Retrieved 2011-06-09. 
  3. ^ Comparison of Photovoltaic Array Maximum Power Point Tracking Techniques
  4. ^ Benanti, Travis L.; Venkataraman, D. (25 April 2005). "Organic Solar Cells: An Overview Focusing on Active Layer Morphology" (PDF). Photosynthesis Research. 87 (1): 77. doi:10.1007/s11120-005-6397-9. Retrieved 27 August 2013. 
  5. ^ "Evaluation of Micro Controller Based Maximum Power Point Tracking Methods Using dSPACE Platform" (PDF). itee.uq.edu.au. Retrieved 2011-06-14. 
  6. ^ "Comparative Study of Maximum Power Point Tracking Algorithms". doi:10.1002/pip.459. 
  7. ^ http://dspace.mit.edu/bitstream/handle/1721.1/61308/702674669.pdf
  8. ^ "A SIDE-BY-SIDE COMPARISON OF MICRO AND CENTRAL INVERTERS IN SHADED AND UNSHADED CONDITIONS" (PDF). Retrieved 27 August 2013. 
  9. ^ Photovoltaics: Design and Installation Manual. Newsociety Publishers. 2004. p. 80. 
  10. ^ "Summary Report on the DOE High-tech Inverter Workshop" (PDF). Sponsored by the US Department of Energy, prepared by McNeil Technologies. eere.energy.gov. Retrieved 2011-06-10. 
  11. ^ a b Fraunhofer ISE report , archived version as per September 2014 (archived PDF)

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ABOUT ORANGE COUNTY CALIFORNIA

Orange County is a county in Southern California, United States. Its county seat is Santa Ana. According to the 2000 Census, its population was 2,846,289, making it the second most populous county in the state of California, and the fifth most populous in the United States. The state of California estimates its population as of 2007 to be 3,098,121 people, dropping its rank to third, behind San Diego County. Thirty-four incorporated cities are located in Orange County; the newest is Aliso Viejo.

Unlike many other large centers of population in the United States, Orange County uses its county name as its source of identification whereas other places in the country are identified by the large city that is closest to them. This is because there is no defined center to Orange County like there is in other areas which have one distinct large city. Five Orange County cities have populations exceeding 170,000 while no cities in the county have populations surpassing 360,000. Seven of these cities are among the 200 largest cities in the United States.

Orange County is also famous as a tourist destination, as the county is home to such attractions as Disneyland and Knott's Berry Farm, as well as sandy beaches for swimming and surfing, yacht harbors for sailing and pleasure boating, and extensive area devoted to parks and open space for golf, tennis, hiking, kayaking, cycling, skateboarding, and other outdoor recreation. It is at the center of Southern California's Tech Coast, with Irvine being the primary business hub.

The average price of a home in Orange County is $541,000. Orange County is the home of a vast number of major industries and service organizations. As an integral part of the second largest market in America, this highly diversified region has become a Mecca for talented individuals in virtually every field imaginable. Indeed the colorful pageant of human history continues to unfold here; for perhaps in no other place on earth is there an environment more conducive to innovative thinking, creativity and growth than this exciting, sun bathed valley stretching between the mountains and the sea in Orange County.

Orange County was Created March 11 1889, from part of Los Angeles County, and, according to tradition, so named because of the flourishing orange culture. Orange, however, was and is a commonplace name in the United States, used originally in honor of the Prince of Orange, son-in-law of King George II of England.

Incorporated: March 11, 1889
Legislative Districts:
* Congressional: 38th-40th, 42nd & 43
* California Senate: 31st-33rd, 35th & 37
* California Assembly: 58th, 64th, 67th, 69th, 72nd & 74

County Seat: Santa Ana
County Information:
Robert E. Thomas Hall of Administration
10 Civic Center Plaza, 3rd Floor, Santa Ana 92701
Telephone: (714)834-2345 Fax: (714)834-3098
County Government Website: http://www.oc.ca.gov

CITIES OF ORANGE COUNTY CALIFORNIA:

City of Aliso Viejo, 92653, 92656, 92698
City of Anaheim, 92801, 92802, 92803, 92804, 92805, 92806, 92807, 92808, 92809, 92812, 92814, 92815, 92816, 92817, 92825, 92850, 92899
City of Brea, 92821, 92822, 92823
City of Buena Park, 90620, 90621, 90622, 90623, 90624
City of Costa Mesa, 92626, 92627, 92628
City of Cypress, 90630
City of Dana Point, 92624, 92629
City of Fountain Valley, 92708, 92728
City of Fullerton, 92831, 92832, 92833, 92834, 92835, 92836, 92837, 92838
City of Garden Grove, 92840, 92841, 92842, 92843, 92844, 92845, 92846
City of Huntington Beach, 92605, 92615, 92646, 92647, 92648, 92649
City of Irvine, 92602, 92603, 92604, 92606, 92612, 92614, 92616, 92618, 92619, 92620, 92623, 92650, 92697, 92709, 92710
City of La Habra, 90631, 90632, 90633
City of La Palma, 90623
City of Laguna Beach, 92607, 92637, 92651, 92652, 92653, 92654, 92656, 92677, 92698
City of Laguna Hills, 92637, 92653, 92654, 92656
City of Laguna Niguel
, 92607, 92677
City of Laguna Woods, 92653, 92654
City of Lake Forest, 92609, 92630, 92610
City of Los Alamitos, 90720, 90721
City of Mission Viejo, 92675, 92690, 92691, 92692, 92694
City of Newport Beach, 92657, 92658, 92659, 92660, 92661, 92662, 92663
City of Orange, 92856, 92857, 92859, 92861, 92862, 92863, 92864, 92865, 92866, 92867, 92868, 92869
City of Placentia, 92870, 92871
City of Rancho Santa Margarita, 92688, 92679
City of San Clemente, 92672, 92673, 92674
City of San Juan Capistrano, 92675, 92690, 92691, 92692, 92693, 92694
City of Santa Ana, 92701, 92702, 92703, 92704, 92705, 92706, 92707, 92708, 92711, 92712, 92725, 92728, 92735, 92799
City of Seal Beach, 90740
City of Stanton, 90680
City of Tustin, 92780, 92781, 92782
City of Villa Park, 92861, 92867
City of Westminster, 92683, 92684, 92685
City of Yorba Linda, 92885, 92886, 92887

Noteworthy communities Some of the communities that exist within city limits are listed below: * Anaheim Hills, Anaheim * Balboa Island, Newport Beach * Corona del Mar, Newport Beach * Crystal Cove / Pelican Hill, Newport Beach * Capistrano Beach, Dana Point * El Modena, Orange * French Park, Santa Ana * Floral Park, Santa Ana * Foothill Ranch, Lake Forest * Monarch Beach, Dana Point * Nellie Gail, Laguna Hills * Northwood, Irvine * Woodbridge, Irvine * Newport Coast, Newport Beach * Olive, Orange * Portola Hills, Lake Forest * San Joaquin Hills, Laguna Niguel * San Joaquin Hills, Newport Beach * Santa Ana Heights, Newport Beach * Tustin Ranch, Tustin * Talega, San Clemente * West Garden Grove, Garden Grove * Yorba Hills, Yorba Linda * Mesa Verde, Costa Mesa

Unincorporated communities These communities are outside of the city limits in unincorporated county territory: * Coto de Caza * El Modena * Ladera Ranch * Las Flores * Midway City * Orange Park Acres * Rossmoor * Silverado Canyon * Sunset Beach * Surfside * Trabuco Canyon * Tustin Foothills

Adjacent counties to Orange County Are: * Los Angeles County, California - north, west * San Bernardino County, California - northeast * Riverside County, California - east * San Diego County, California - southeast

 

 

"An honest answer is the sign of true friendship."

We receive many customers from across the world including people from the following cities:

Aliso Viejo 92656, 92698, Anaheim 92801, 92802, 92803, 92804, 92805, 92806, 92807, 92808, 92809, 92812, 92814, 92815, 92816, 92817, 92825, 92850, 92899, Atwood, 92811, Brea, 92821, 92822,92823, Buena Park, 90620 ,90621,90622, 90624, Capistrano Beach, 92624, Corona del Mar, 92625, Costa Mesa, 92626, 92627, 92628, Cypress, 90630, Dana Point, 92629, East Irvine, 92650, El Toro, 92609, Foothill Ranch, 92610, Fountain Valley, 92708, 92728, Fullerton, 92831, 92832, 92833, 92834, 92835, 92836, 92837, 92838, Garden Grove, 92840, 92841, 92842, 92843 ,92844, 92845, 92846, Huntington Beach , 92605, 92615, 92646, 92647, 92648, 92649, Irvine, 92602, 92603, 92604, 92606, 92612, 92614, 92616, 92617, 92618, 92619, 92620, 92623, 92697, La Habra, 90631, 90632, 90633, La Palma, 90623, Ladera Ranch, 92694, Laguna Beach , 92651, 92652, Laguna Hills ,92653, 92654,92607,92677, Laguna Woods, 92637, Lake Forest, 92630, Los Alamitos, 90720, 90721, Midway City, 92655, Mission Viejo, 92690, 92691, 92692,Newport Beach , 92658, 92659, 92660, 92661, 92662, 92663, 92657,
Orange, 92856, 92857, 92859, 92862, 92863, 92864, 92865, 92866, 92867, 92868, 92869, Placentia, 92870, 92871, Rancho Santa Margarita 92688, San Clemente, 92672, 92673, 92674, San Juan Capistrano, 92675, 92693,
Santa Ana , 92701, 92702, 92703, 92704, 92705 ,92706, 92707, 92711, 92712, 92725.92735, 92799, Seal Beach , 90740, Silverado 92676, Stanton, 90680, Sunset Beach 90742, Surfside 90743, Trabuco Canyon, 92678, 92679,Tustin ,92780, 92781,92782, Villa Park, 92861,Westminster, 92683, 92684, 92685, Yorba Linda, 92885, 92886, 92887

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