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Our offices will be closed Monday 5/25 for the Memorial Day holiday. We will resume normal hours Tuesday 5/26. Have a great holiday weekend!, email us at sales@wholesalesolar.com, or Request a Quote
Our offices will be closed Monday 5/25 for the Memorial Day holiday. We will resume normal hours Tuesday 5/26. Have a great holiday weekend!, email us at sales@wholesalesolar.com, or Request a Quote

Welcome to Wholesale Solar

We are your source for discount prices on solar panels and renewable energy products for home power, back-up power, solar & wind power, off-grid & grid intertied residential, marine and RV power systems. Retail and wholesale pricing.

We design and sell renewable energy systems for projects large and small, for homeowners and do-it-yourselfers, contractors, installers, electricians, and developers. Call one of our experienced solar design techs to talk about your project at 1-800-472-1142. If you have your most recent electric bill handy, we'll be able to get started with the design process right away.

Wholesale Solar Panles

Solar Panels - Choose from a variety of brands like Astronergy, Kyocera, Solarland and SolarWorld

Backup Power

Backup Power - Plug n Play systems provide emergency electrical power for your home or business when the grid goes down.

Wholesale Solar Specials and Sales

Specials - Check out items currently on sale or items like refurbished inverters with special pricing.

Pre-wired Solar Power Centers

Power Centers - Wholesale Solar offers prewired and tested inverter systems for offgrid and backup power applications.

Packaged Solar Power Systems

Packaged Systems - Complete solar power package solutions for offgrid, gridtie, backup power, boats, RVs, telecommunications and more!

Wholesale Solar Information Center

Information Center - A collection of information and resources related to installing solar. Use the system sizing calculators to help size your system.

"Wholesale Solar is 100% employee owned. Each of us has a personal stake in providing outstanding service to our customers. We thrive on your success!" -Allie, Employee Owner

Special Pricing on Pallets of Solar Panels
Model Brand Part # Watts Quantity Per Pallet Total Pallet Watts Price Per Watt Price
SolarWorld 285 Silver Mono Plus SolarWorld 1892011 285 30 8,550 $1.32
$11,250.00
Qty
Astronergy 260 Silver Poly Astronergy 1890031 260 25 6,500 $0.88
$5,750.00
Qty
Astronergy 310 Silver Poly Astronergy 1977311 310 20 6,200 $0.95
$5,902.00
Qty
SolarWorld 315 Silver Mono Pro XL SolarWorld 1892008 315 21 6,615 $1.00
$6,590.00
Qty
SolarWorld 280 Black Mono Plus SolarWorld 1891999 280 30 8,400 $1.10
$9,275.00
Qty
SolarWorld 275 Black Mono Plus SolarWorld 1892010 275 30 8,250 $1.18
$9,720.00
Qty
SolarWorld 270 Silver Mono Protect SolarWorld 1892004 270 30 8,100 $1.39
$11,263.00
Qty



Discount Prices on Solar Panels
Model Brand Part # Watts Minimum Quantity Price Per Watt Price
Astronergy 260 Silver Poly Astronergy 1970260 260 1 $0.96
$250.00
Qty
Astronergy 310 Silver Poly Astronergy 1977310 310 1 $1.02
$315.00
Qty
SolarWorld 315 Silver Mono Pro XL SolarWorld 1922279 315 1 $1.06
$335.00
Qty
SolarWorld 285 Silver Mono Plus SolarWorld 1922385 285 1 $1.35
$385.00
Qty
SolarWorld 280 Black Mono Plus SolarWorld 1922287 280 1 $1.41
$395.00
Qty
SolarWorld 275 Black Mono Plus SolarWorld 1922277 275 1 $1.38
$380.00
Qty
SolarWorld 250 Silver Poly Plus SolarWorld 1922011 250 1 $1.00
$250.00
Qty
Topoint 190 Silver Mono Topoint 1530190 190 1 $1.00
$190.00
Qty

See all of our solar panels.
SolarWorld Gridtie Systems

285 Watt Panels
SolarEdge Gridtie Solar Systems with SolarWorld Solar Panels
These SolarWorld Gridtie Solar Systems feature the SolarEdge platform—a revolutionary way of maximizing the sun’s power using SolarEdge P300 PowerBoxes. SolarEdge PowerBox optimizers are paired up with SolarWorld solar panels and strung to ETL listed SolarEdge inverters.

SolarEdge Gridtie Systems with SolarWorld Solar Panels SolarWorld logo
SolarEdge Solarworld Package
SolarEdge Gridtie System Array Size Watts
STC / PTC [1]
Racking  Monthly Output*[2] # of Solar
Panels
SolarEdge
Inverter
Product
Number
Price [3]
2,850/2,576 Included up to 386 kWh 10 1 Solaredge 5.0K 1891200
$6,785.00
Qty
3,420/3,091 Included up to 464 kWh 12 1 Solaredge 5.0K 1891515
$7,784.60
Qty
4,275/3,864 Included up to 580 kWh 15 1 Solaredge 5.0K 1891205
$9,286.50
Qty
4,560/4,122 Included up to 618 kWh 16 1 Solaredge 5.0K 1891520
$9,783.80
Qty
5,700/5,152 Included up to 773 kWh 20 1 Solaredge 6.0K 1891210
$12,050.00
Qty
6,840/6,182 Included up to 927 kWh 24 1 Solaredge 6.0K 1891215
$14,049.20
Qty
8,550/7,728 Included up to 1,159 kWh 30 1 Solaredge 10.0K 1891220
$17,107.00
Qty
9,120/8,243 Included up to 1,236 kWh 32 1 Solaredge 10.0K 1891525
$18,066.60
Qty
10,260/9,274 Included up to 1,391 kWh 36 1 Solaredge 10.0K 1891221
$19,985.80
Qty
11,400/10,304 Included up to 1,546 kWh 40 2 Solaredge 6.0K 1891225
$22,713.00
Qty
14,250/12,880 Included up to 1,932 kWh 50 2 Solaredge 6.0K 1891230
$27,511.00
Qty
17,100/15,456 Included up to 2,318 kWh 60 1 SE10000A-US
& 1 SE6000A-US-U
1891235
$32,968.00
Qty
20,520/18,547 Included up to 2,782 kWh 72 2 Solaredge 10.0K 1891222
$39,384.60
Qty
22,800/20,608 Included up to 3,091 kWh 80 3 SE6000A-US 1891240
$43,552.00
Qty
1. STC is Standard Test conditions or factory ratings. PTC is PV-USA Test Ratings which are closer to real world conditions. Your unique conditions will affect your system output. Read more...
2. What is a kilowatt hour (kWh) and how to find it on your power bill.
3. Please be aware that these prices may change daily. Call for current pricin.
* Monthly Output based on 5 sun hours per day.



315 Watt Panels


SolarEdge Gridtie Systems with SolarWorld Solar Panels SolarWorld logo

SolarEdge Gridtie Solar Systems with SolarWorld Solar Panels
These SolarWorld Gridtie Systems feature the SolarEdge system—a revolutionary way of maximizing the sun’s power using SolarEdge P400 PowerBoxes. SolarEdge PowerBox optimizers are paired up with SolarWorld 315-watt solar panels and strung to UL listed SolarEdge inverters.

Learn About SolarEdge
SolarEdge Solarworld Package
SolarEdge Gridtie System Array Size Watts
STC / PTC[1]
Racking Monthly Output[2] # of Solar
Panels
SolarEdge
Inverter
Product
Number
Price[3]
SolarEdge SolarWorld Grid-tie Solar System 3,150 watts 3,150/2,756 Included up to 413 kWh 10 1 SE5000A-US 1891550
$6,365.00
Qty
SolarEdge SolarWorld Grid-tie Solar System 3,780 watts 3,780/3,307 Included up to 496 kWh 12 1 SE5000A-US 1891555
$7,280.60
Qty
SolarEdge SolarWorld Grid-tie Solar System 4,725 watts 4,725/4,134 Included up to 620 kWh 15 1 SE5000A-US 1891560
$8,656.50
Qty
SolarEdge SolarWorld Grid-tie Solar System 5,040 watts 5,040/4,410 Included up to 661 kWh 16 1 SE5000A-US 1891565
$9,111.80
Qty
SolarEdge SolarWorld Grid-tie Solar System 6,300 watts 6,300/5,512 Included up to 827 kWh 20 1 SE6000A-US 1891570
$11,210.00
Qty
SolarEdge SolarWorld Grid-tie Solar System 7,560 watts 7,560/6,614 Included up to 992 kWh 24 1 SE7600A-US 1891575
$13,031.20
Qty
SolarEdge SolarWorld Grid-tie Solar System 9,450 watts 9,450/8,268 Included up to 1,240 kWh 30 1 SE10000A-US 1891580
$15,847.00
Qty
SolarEdge SolarWorld Grid-tie Solar System 10,080 watts 10,080/8,819 Included up to 1,323 kWh 32 1 SE10000A-US 1891585
$16,722.60
Qty
SolarEdge SolarWorld Grid-tie Solar System 12,600 watts 12,600/11,024 Included up to 1,654 kWh 40 2 SE6000A-US 1891590
$21,033.00
Qty
SolarEdge SolarWorld Grid-tie Solar System 15,750 watts 15,750/13,780 Included up to 2,067 kWh 50 2 SE7600A-US 1891595
$26,351.00
Qty
SolarEdge SolarWorld Grid-tie Solar System 18,900 watts 18,900/16,536 Included up to 2,480 kWh 60 2 SE10000A-US 1891600
$31,213.00
Qty
SolarEdge SolarWorld Grid-tie Solar System 25,200 watts 25,200/22,048 Included up to 3,307 kWh 80 2 SE11400A-US 1891605
$41,277.00
Qty
SolarEdge SolarWorld Grid-tie Solar System 25,200 watts 25,200/22,048 Included up to 3,307 kWh 80 3 SE7600A-US 1891610
$41,602.00
Qty
1. STC is Standard Test conditions or factory ratings. PTC is PV-USA Test Ratings which are closer to real world conditions. Your unique conditions will affect your system output. Read more...
2. What is a kilowatt hour (kWh) and how to find it on your power bill.
3. Please be aware that these prices may change daily. Call for current pricing.
* Monthly Output based on 5 sun hours per day.

View our complete Wholesale Solar grid tie solar systems
Enphase Starter Solar Kits
260 Watt Panels


enphase energy micro-inverter home solar power system Astronergy

Enphase Starter Kits
Astronergy Solar Micro Inverter Grid-tie System

The Enphase Starter Kits are the perfect way to get started with solar. It includes up to four Astronergy solar panels and four M215 Enphase Microinverters. This system includes American-made IronRidge XR100 roof mounting rail system. Since it's an expandable system, you can add one solar panel and one microinverter at a time. Find out more. Give us a call at 1-800-472-1142 or email us at Sales@wholesalesolar.comLearn About Enpahse

Enphase Astronergy Packages
Micro-inverter Grid-tie System Array Size Watts STC / PTC [1] Racking  Monthly Output*[2] # of Solar Panels SolarEdge Inverter Product Number Price [3]
Enphase 260W Single Panel DIY Starter Kit 260/236 Included up to 34 kWh 1 1 Enphase M215 - Micro-inverter 1890800
$1,091
$1,091
Enphase 520W DIY Starter Kit 520/471 Included up to 69 kWh 2 2 Enphase M215 - Micro-inverter 1890805
$1,430
$1,430
Enphase 780W DIY Starter Kit 780/707 Included up to 103 kWh 3 3 Enphase M215 - Micro-inverter 1890810
$1,911
$1,911
Enphase 1,040W DIY Starter Kit 1,040/942 Included up to 137 kWh 4 4 Enphase M215 - Micro-inverter 1890815
$2,391
$2,391
1. STC is Standard Test conditions or factory ratings. PTC is PV-USA Test Ratings which are closer to real world conditions. Your unique conditions will affect your system output. Read more...
2. What is a kilowatt hour (kWh) and how to find it on your power bill.
3. Please be aware that these prices may change daily. Call for current pricing.
* Monthly Output based on 5 sun hours per day 

View our complete Enphase grid tie solar systems
Enphase and Astronergy Solar Kits
260 Watt Panels


enphase energy micro-inverter home solar power system Astronergy

Astronergy M215 Microinverter Grid-tie Systems
Astronergy solar panels are paired with Enphase M215 Microinverters for an unbeatable system for your home or business. Grab a power bill, compare the systems below, and give us a call at 1-800-472-1142.

Enphase Astronergy Packages
Enphase System Model
Array Size Watts STC / PTC [1] Racking  Monthly Output*[2] # of Solar Panels Enphase Inverter Model Product Number Price [3]
2,600-watt Astronergy M215 Micro Inverter Gridtie System 2,600/2,356 Included up to 344 kWh 10 M215 1890300
$4,862
$4,862
3,120-watt Astronergy M215 Micro Inverter Gridtie System 3,120/2,827 Included up to 412 kWh 12 M215 1890301
$5,777
$5,777
3,900-watt Astronergy M215 Micro Inverter Gridtie System 3,900/3,534 Included up to 515 kWh 15 M215 1890305
$7,191
$7,191
5,200-watt Astronergy M215 Micro Inverter Gridtie System 5,200/4,712 Included up to 687 kWh 20 M215 1890310
$9,476
$9,476
6,240-watt Astronergy M215 Micro Inverter Gridtie System 6,240/5,654 Included up to 824 kWh 24 M215 1890315
$11,306
$11,306
6,500-watt Astronergy M215 Micro Inverter Gridtie System - Pallet Special! 6,500/5,890 Included up to 859 kWh 25 M215 1890320
$11,266
$11,266
7,800-watt Astronergy M215 Micro Inverter Gridtie System 7,800/7,068 Included up to 1,031 kWh 30 M215 1890325
$13,451
$13,451
9,360-watt Astronergy M215 Micro Inverter Gridtie System 9,360/8,482 Included up to 1,237 kWh 36 M215 1890330
$16,107
$16,107
10,400-watt Astronergy M215 Micro Inverter Gridtie System 10,400/9,424 Included up to 1,374 kWh 40 M215 1890335
$17,784
$17,784
13,000-watt Astronergy M215 Micro Inverter Gridtie System - Pallet Special! 13,000/11,780 Included up to 1,718 kWh 50 M215 1890340
$22,240
$22,240
15,600-watt Astronergy M215 Micro Inverter Gridtie System 15,600/14,136 Included up to 2,061 kWh 60 M215 1890345
$26,693
$26,693
20,800-watt Astronergy M215 Micro Inverter Gridtie System 20,800/18,848 Included up to 2,748 kWh 80 M215 1890350
$35,492
$35,492
1. STC is Standard Test conditions or factory ratings. PTC is PV-USA Test Ratings which are closer to real world conditions. Your unique conditions will affect your system output. Read more...
2. What is a kilowatt hour (kWh) and how to find it on your power bill.
3. Please be aware that these prices may change daily. Call for current pricing.
* Monthly Output based on 5 sun hours per day 

View our complete Enphase grid tie solar systems
Grid-tie Solar Systems with Emergency Battery Backup
Grid-tie Solar Systems with True Off-grid Capability

Equipped with OutBack Power's Radian inverters, these solar power grid-tie systems will power 120-volt and 240-volt circuits. Designed with true off-grid capability, you can charge your battery bank with solar panels or a gas generator. More versatile than the systems above, these systems also have a "grid-assist mode" for folks mainly interested in being off the grid, but would like to have access to grid power.

Call a Wholesale Solar technician for help sizing these systems and choosing the correct battery bank size.

Solar Power System Array Size
Watts
STC / PTC [1]
Output Racking Battery Bank Monthly Output *[2] # of Solar Panels Product Number Price [3]
Grid-tie Battery Backup with 21 Astronergy Solar Panels 5,460/4,948 120/240V IronRidge XR100 Fullriver 415 Ah Battery Bank (1898601) up to 742 kWh 21 1890620
$20,150.00
Qty
Grid-tie Battery Backup with 24 Astronergy Solar Panels 6,240/5,654 120/240V IronRidge XR100 Fullriver 415 Ah Battery Bank (1898601) up to 848 kWh 24 1890625
$21,053.00
Qty
Grid-tie Battery Backup with 30 Astronergy Solar Panels 7,800/7,068 120/240V IronRidge XR100 Fullriver 415 Ah Battery Bank (1898601) up to 1,060 kWh 30 1890630
$23,558.00
Qty
Grid-tie Battery Backup with 45 Astronergy Solar Panels 11,700/10,602 120/240V IronRidge XR100 Fullriver 830 Ah Battery Bank (1898616) up to 1,590 kWh 45 1891010
$38,667.00
Qty
Grid-tie Battery Backup with 60 Astronergy Solar Panels 15,600/14,136 120/240V IronRidge XR100 Fullriver 830 Ah Battery Bank (1898616) up to 2,120 kWh 60 1891015
$44,043.00
Qty
With American-Made SolarWorld Solar Panels   American Flag
Grid-tie Battery Backup with 24 SolarWorld Solar Panels 6,840/6,182 120/240V IronRidge XR100 Fullriver 415 Ah Battery Bank (1898601) up to 927 kWh 24 1891000
$24,053.00
Qty
Grid-tie Battery Backup with 30 SolarWorld Solar Panels 8,550/7,728 120/240V IronRidge XR100 Fullriver 415 Ah Battery Bank (1898601) up to 1,159 kWh 30 1891005
$26,915.00
Qty
Grid-tie Battery Backup with 45 SolarWorld Solar Panels 12,825/11,592 120/240V IronRidge XR100 Fullriver 830 Ah Battery Bank (1898616) up to 1,739 kWh 45 1891020
$44,742.00
Qty
Grid-tie Battery Backup with 60 SolarWorld Solar Panels 17,100/15,456 120/240V IronRidge XR100 Fullriver 830 Ah Battery Bank (1898616) up to 2,318 kWh 60 1891025
$52,143.00
Qty
1. STC is Standard Test conditions or factory ratings. PTC is PV-USA Test Ratings which are closer to real world conditions. Your unique conditions will affect your system output. Read more...
2. What is a kilowatt hour (kWh) and how to find it on your power bill.
3. Prices do not include shipping, installation or applicable taxes and may change daily.
* Monthly Output based on 5 sun hours per day 
Have you come to this site seeking information About Solar Panels? Solar technology? Photovoltaics? (PDF)

What follows is basic history about solar panels and information to help you know what solar panels to buy.

Solar Panels: Harvesting the Energy from our Sun
Virtually unlimited power is available from our nearest star, the Sun. In just one hour, our planet receives more energy from the sun than the entire world uses during an entire year. Electricity-producing solar panels have only been around for the last 60 years, yet they have completely transformed how we harness solar energy

In 1839, a nineteen year-old French physicist named Alexandre-Edmond Becquerel discovered the operating principle of the solar cell, known as the photovoltaic effect. It wasn’t until 1876 that this effect materialized into a viable method of producing electricity with the work of William Grylls Adams. He discovered that by illuminating a junction between selenium and platinum, a photovoltaic effect occurs; electricity could now be produced without moving parts.

Revolutionary as they may have been, the selenium solar cells were not efficient enough to power electrical equipment. That ability occurred in 1953 when a Bell Laboratories employee Gerald Pearson had the bright idea of making a solar cell with silicon instead of selenium. The New York Times heralded the discovery as “The beginning of a new era, leading eventually to the realization of harnessing the almost limitless energy of the sun for the uses of civilization”.

Just in time for the space race, the first solar panels made their debut in the satellite industry. Vanguard I, the first solar-powered satellite celebrated its 53rd birthday this year, setting mileage records and holding the title of being the oldest artificial satellite still in orbit.

The first solar modules were only efficient enough for space applications, where the Sun’s radiation is much stronger. Eventually satellite research paved the way for Earth-based technology. The 1990’s were pivotal years for photovoltaic technology. Innovations in solar cells allowed for greater efficiency while lowering the cost of production. Germany and Japan led the way with long-term solar power incentive programs helping lower the cost to the public, and spurring the growth of a robust Photovoltaic industry in both countries.

California Leads the Nation
In 2006, California made a major long-term commitment to solar power by passing the California Solar Initiative, a ten-year incentive program with the goal of installing 3,000 megawatts of solar panels on the equivalent of one million rooftops. California leads the nation in solar panel installations, as it currently has more photovoltaic systems installed than any other state. This incredible boom has taken place mostly due to California’s Renewable Portfolio Standard, which requires that 20 percent of the state’s electricity come from renewable resources by 2010. In 2008 the state decided that it was not moving fast enough in meeting these goals and enacted a feed-in tariff, requiring utility companies to buy back excess power produced by homeowner’s and private photovoltaic installations. In the same year, the state also raised the Renewable Portfolio Standard to 33 percent by 2020, greatly helping spur growth in the renewable energy industry.

How Solar Panels work
Photovoltaic solar modules are composed of multiple, interconnected solar cells, which effectively trap photon energy between layers of silicon wafers. Negatively charged electrons are then knocked loose from their atoms, allowing them to flow freely through the semiconductors. Separate diodes, and P-N junctions prevent reverse currents and reduce loss of power on partially shaded panels.

Since the flow of electrical current is going in one direction, like a battery, the electricity generated is called direct current (DC). Sunlight conversion rates are typically in the 5 to 18 percent range, with some laboratory experiments reaching efficiencies as high as 30 percent. Future possibilities include the development of multi-junction solar cells that are capable of harnessing a wider bandwidth of useable light. We are still considered to be in the “early” stages of solar cell technology.

Solar Panel Components
Photovoltaic solar panels are the main building block in a solar power system. Since each solar module produces a limited amount of power, installations usually consist of multiple panels, called an array. The array produces DC (direct current), which can be stored in batteries or instantly converted into AC (alternating current) required by conventional appliances.

Equipment that converts the power from DC to AC is known as an solar inverter, and they come in a few varieties, modified sine wave or pure sine wave. They are further classified based on which type of system it is to be used in, whether it is off-grid or grid interconnected. Recently the innovation of micro inverters has greatly simplified installations, and makes it easy to add on panels to an installation. Each solar module is paired with its own micro inverter, which then coverts the power directly at the panel. For off grid installations the use of a charge controller is necessary to properly manage the power harvest, charge the batteries, and prevent overcharging.

The greatest innovation in charge controllers would have to be the relatively new feature called maximum power point tracking (MPPT). This innovative method of charging batteries constantly monitors peak power voltage from the array and input voltage on the batteries adjusting amperage to compensate for the fluctuations. This provides the most efficient means to manage the power harvest. The function of MPPT charge controllers is analogous to the transmission of a car, keeping your charging system in the “right gear”. Other components of the solar system would include the wiring and mounting hardware, while some installations use a tracker that changes its tilt angle and direction throughout the day.

Types of Solar Panels
Solar panels are classified into three classes: mono-crystalline (single crystal), poly-crystalline (multiple crystals), or amorphous silicon. Mono-crystalline is indicative of the continuous and unbroken sample of silicon in which the cell is manufactured from. This method uses very pure silicon grown in a complex growth process, and then sliced into wafers that compose the individual cells. This was the first method used to manufacture solar cells, and are still highly regarded for their efficiency ratios.

Poly-crystalline panels are composed of many crystallites of varying size and orientation. These multi-crystalline panels are generally less expensive and slightly less efficient than mono-crystalline modules, yet lately the difference in efficiency is very small. Like their mono-crystalline counterpart, the cells are also cut into wafers that make up the individual cells of a solar panel.

Amorphous solar panels use the non-crystalline, allotropic form of silicon, in which a thin layer of this silicon substrate is applied to the back of a plate of glass. These panels are much cheaper and less energy efficient, yet they are more versatile in how they can be used. For example, amorphous solar panels can be manufactured into long sheets of roofing material. Thin Film solar panels also fall into the amorphous category. This type of cells can be mounted on a flexible backing, making them more suited for mobile applications.

Each of the solar panel types is estimated to last at least twenty-five years. Instead of stopping production completely, electricity production will decline a little, gradually, over decades. The longevity of a solar panel refers to the number of years before the unit starts producing only 80 percent of its original power rating. The industry standard for warranties is 20 to 25 years, although it is not uncommon for panels to produce adequate power for over 30 years.

Off Grid versus Grid tied
Solar panels are used extensively in rural areas, where access to the grid is non-existent or inaccessible. These installations are called off grid (or independent, stand-alone) solar power systems, and require the use of batteries to store the energy for use at night or on long stretches of overcast weather. The energy stored in the batteries leaves the batteries as DC electricity which can power DC appliances (as in RV’s) or be converted to alternating current (AC) for use with conventional appliances. Much like running your own mini utility company, this method gives you full independence from the national grid.

You can eliminate the cost of batteries by going with a system that connects right into your home’s main junction box and use the grid as your power source at night or on long stretches of inclement weather. These installations are known as grid-tied or grid-interconnected systems. This version of solar system enables you to sell any excess power you produce back to the utility companies who have chosen to support “net metering”. Once you are signed up on a net metering program, your utility company will have a smart meter installed known as a Time of Use Meter, which will actually run backwards when you are producing excess power. It is wise to keep in mind that Grid tied systems without a battery backup, are only functional when the grid is operational. Due to anti-islanding features on grid tied inverters, which protect utility workers from working on a live line, grid-tied systems without a battery back up will not continue to produce power during a power outage regardless of whether you have sunshine or not.

Since solar panels produce DC, or direct current, they must be coupled with a solar inverter to convert the energy from DC to AC, or alternating current. In a grid tied system this can be done by a large central inverter, or each solar panel can be outfitted with its own micro inverter. Once the power is converted to alternating current and its phase is synchronized with that of the grid, it is then tied in to your main junction box, which is ultimately interconnected to the national grid.