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Solar Panels

Since 1999, altE has offered customers across the globe solar panels for their homes, cabins, RV's, and boats. We carry leading brands such as Q Cells, Panasonic, Peimar, and our own altE solar panels.

How much energy will your solar power system need to produce and store? Try our off-grid sizing and grid-tie sizing calculators. Visit our Solar Blog and our YouTube channel for more solar insights, DIY tips, and how-to's.

Want a custom-designed solar power system for your home? Give us a call at 877-878-4060 and our trained solar professionals will work with you to design your own home solar system for FREE!

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SOLAR PANELS FOR SALE

Product Name  Volts Watts $ / Watt Price
  altE 100 Watt 12V Mono Solar Panel     altE 100 Watt 12V Mono   AltE ALT100-12M ALTS-100W-12M altE 100 Watt 12V Mono Solar Panel  12 V  100 W  1.49  $149.00
  altE 150 Watt 12V Poly Solar Panel     altE 150 Watt 12V Poly   AltE ALT150-12P ALTS-150W-12P altE 150 Watt 12V Poly Solar Panel  12 V  150 W  1.17  $175.00
  altE 200 Watt 24V Poly Solar Panel     altE 200 Watt 24V Poly   AltE ALT200-24P ALTS-200W-24P altE 200 Watt 24V Poly Solar Panel  24 V  200 W  1.10  $219.00
  altE 50 Watt 12V Mono Solar Panel     altE 50 Watt 12V Mono   AltE ALT50-12M ALTS-50W-12M altE 50 Watt 12V Mono Solar Panel  12 V  50 W  1.58  $79.00
  Ameresco Solar 20J 20W 12V Solar Panel with J-Box     Ameresco Solar 20J 20W 12V with J-Box   Ameresco Solar 20J AMR20-20J Ameresco Solar 20J 20W 12V Solar Panel with J-Box  12 V  20 W  9.75  $195.00
  Ameresco Solar 30J 30W 12V Solar Panel with J-Box     Ameresco Solar 30J 30W 12V with J-Box   Ameresco Solar 30J AMR30-30J Ameresco Solar 30J 30W 12V Solar Panel with J-Box  12 V  30 W  8.97  $269.00
  Ameresco Solar 40J 40W 12V Solar Panel with J-Box     Ameresco Solar 40J 40W 12V with J-Box   Ameresco Solar 40J AMR40-40J Ameresco Solar 40J 40W 12V Solar Panel with J-Box  12 V  40 W  6.89  $275.74
  Ameresco Solar 50J 50W 12V Solar Panel with J-Box     Ameresco Solar 50J 50W 12V with J-Box   Ameresco Solar 50J AMR50-50J Ameresco Solar 50J 50W 12V Solar Panel with J-Box  12 V  50 W  5.90  $295.00
  Ameresco Solar 90J 90W 12V Solar Panel with J-Box     Ameresco Solar 90J 90W 12V with J-Box   Ameresco Solar 90J AMR90-90J Ameresco Solar 90J 90W 12V Solar Panel with J-Box  12 V  90 W  4.43  $399.00
  Panasonic 340 Watt HIT High Efficiency Solar Panel     Panasonic 340 Watt HIT High Efficiency   Panasonic VBHN340SA17 PAN340HITMONO Panasonic 340 Watt HIT High Efficiency Solar Panel  32 V  340 W  0.94  $318.00
  Peimar 30 Watt 12 V Poly Solar Panel     Peimar 30 Watt 12 V Poly   Peimar OS30P PEI-30W-12P Peimar 30 Watt 12 V Poly Solar Panel  12 V  30 W  1.63  $49.00
  Peimar 310 Watt Mono Solar Panel, All Black     Peimar 310 Watt Mono , All Black   Peimar SG310M-FB PEI310SG310MB Peimar 310 Watt Mono Solar Panel, All Black  20 V  310 W  0.56  $172.50
  Peimar 315 Watt Mono Solar Panel     Peimar 315 Watt Mono   Peimar SG315M PEI315SG315M Peimar 315 Watt Mono Solar Panel  20 V  315 W  0.54  $171.36
  Q CELLS 320 Watt Mono Duo Cell Solar Panel G7     Q CELLS 320 Watt Mono Duo Cell G7   Q CELLS Q.PEAK DUO G7-320 HAN320QPKG7320 Q CELLS 320 Watt Mono Duo Cell Solar Panel G7  20 V  320 W  0.62  $199.00
  Q CELLS 320 Watt Mono Duo Cell Solar Panel, All Black     Q CELLS 320 Watt Mono Duo Cell , All Black   Q CELLS Q.PEAK DUO BLK G5-320 HAN320QPKD320MB Q CELLS 320 Watt Mono Duo Cell Solar Panel, All Black  20 V  320 W  0.63  $202.00
  Q CELLS 330 Watt Mono Duo Cell Solar Panel     Q CELLS 330 Watt Mono Duo Cell   Q CELLS Q.PEAK DUO G7-330 HAN330QPKDG7330 Q CELLS 330 Watt Mono Duo Cell Solar Panel  20 V  330 W  0.59  $196.00
  Q CELLS 340 Watt Mono Duo Cell Solar Panel, All Black     Q CELLS 340 Watt Mono Duo Cell , All Black   Q CELLS Q.PEAK DUO BLK-G6-340 HAN340QPKD340MB Q CELLS 340 Watt Mono Duo Cell Solar Panel, All Black  20 V  340 W  0.71  $242.25
  Q CELLS 420 Watt Mono Duo Cell Solar Panel G6.2     Q CELLS 420 Watt Mono Duo Cell G6.2   Q CELLS Q.PEAK DUO L-G6.2-420 HAN420QPKDG6420 Q CELLS 420 Watt Mono Duo Cell Solar Panel G6.2  24 V  420 W  0.59  $249.48
  REC Solar 370 Watt Alpha Mono Solar Panel     REC Solar 370 Watt Alpha Mono   REC Solar REC370AA REC370REC370AA REC Solar 370 Watt Alpha Mono Solar Panel  20 V  370 W  0.92  $342.25
  REC Solar TwinPeak2 320 Watt Mono Solar Panels     REC Solar TwinPeak2 320 Watt Mono   REC Solar REC320TP2M REC320TP2M320 REC Solar TwinPeak2 320 Watt Mono Solar Panels  20 V  320 W  0.64  $205.00
  REC Solar TwinPeak2S 375 Watt Mono Solar Panels     REC Solar TwinPeak2S 375 Watt Mono   REC Solar REC375TP2SM72 REC375TP2S72375 REC Solar TwinPeak2S 375 Watt Mono Solar Panels  24 V  375 W  0.45  $170.25
  Seraphim 305 Watt Mono Solar Panel, Black     Seraphim 305 Watt Mono , Black   Seraphim SEG-6MB-305BB SEP305SEG6MB305 Seraphim 305 Watt Mono Solar Panel, Black  20 V  305 W  0.50  $153.72
  Seraphim 370 Watt Mono Solar Panel     Seraphim 370 Watt Mono   Seraphim SEG-6MA-370WW SEP370SEG6MA370 Seraphim 370 Watt Mono Solar Panel  24 V  370 W  0.49  $182.78

More Info on Solar Panels


What are solar panels?

The term solar panels is often used for a few different types of products that produce energy by collecting sunlight. We most commonly use the phrase to refer to the type that converts sunlight directly into DC electricity. Less frequently, people will use the term in reference to solar thermal collectors, which typically heat a liquid such as water, or solar air heaters, which heats air directly.

Monocrystalline vs. Polycrystalline Solar Panels

We often get asked by customers, "What’s the difference between monocrystalline and polycrystalline solar panels?" Here’s a surprising compare-and-contrast (hint: the differences are not as significant as you might think).

How does a solar panel work?

Quick Version

Rays of sunlight hit solar cells, pushing the electrons in the cell through the wires to create electricity. This electricity flows in one direction, so it is called DC, for Direct Current. (This is opposed to AC, for Alternating Current, where the electrons are going back and forth 50-60 times (50-60Hz) per second.) That is why for most installations, you need an inverter. An inverter changes the DC to AC and makes it usable with your home's appliances.

Detailed Version

On one side of the solar cell, there's an overabundance of electrons and on the other side there is a lack of electrons. Manufacturers create this static imbalance of charges on the cell by doping each side of the silicon solar cell with different chemicals (e.g. phosphorous on one side and boron on the other). Wires or soldered leads are effectively connected to each side of the cell. The positive and negative wires go to whatever you want to charge or power.

Connecting the leads to an electrical load, thus closing the circuit, does not necessarily allow to the electrons to flow. How Solar Panels Work Despite the positive and negative imbalance within the panel, it takes sunlight hitting the silicon in the solar cells to loosen up electrons. And as soon as they are freed up, they immediately start flowing through the wires to power your electrical loads. The more sunlight shines on the cells over time, the more electrons loosen up, the more electrical current flows, and the more power it produces.

Want more? We have created a handy, more in-depth overview of how solar panels work. Here we go into more detail, not only on how the photovoltaic effect works, but also on how solar cells work together to create different voltages, and on the meaning of all the various ratings in the specification brochures.

Video Version

Have you wondered exactly how a solar panel is able to make electricity from the sun? This video explains how by adding chemicals to two sides of a silicon wafer enables it to move electricity with the sun’s light hits it.

Are solar power systems practical for home owners?

We're guessing you wouldn't have come here if you didn't have a hunch they probably were. But just in case, let's review when solar systems are practical for homes and when they're not. If you own home or cabin and you have a roof that roughly points south (North if South of the equator), with no shading by trees, hills, or other homes from around 9AM to 3PM, then you have some prime real estate for installing a solar system.

The overhead cost of going solar has dropped significantly in the last several years. With tax incentives or rebates, a grid-tie solar system will pay for itself in just a few years. Essentially, for the price of a few years electricity, you get 25 to 35 years of electricity. In fact, solar systems will likely keep on producing electricity at a lower rate for even decades after that.

Solar power systems are not practical for locations that get lots of shade throughout the day. With that said, with the advent of micro inverters and grid-tie inverters that have DC optimizers connected to each individual solar panel, some locations with a little bit of shading can still be an option.

What Can I Power With a 100W Solar Panel?

This video gives a list of common items that you can power with a 100W solar panel in various locations and seasons. With minimal math, just a bit of addition, you can figure out how many watts of solar you need - if 100W isn't enough for you.

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