Since 1999 we've helped people across the world design complete systems with solar panels for homes, including off-grid or on-grid, tiny homes, science projects, schools, colleges, commercial installations and remote lighting to name a few.
Solar Panels can save you money while generating renewable energy for your home, school, business, or municipality. Whether you're thinking of staying connected to the grid, or choosing independence by going off the grid, solar energy systems can be a big part of how you power your home, cabin, RV, or even your tiny house. See our solar panels for sale below and select the panel that best fits your solar power system. Also be sure to check out our, blog , videos , and off-grid sizing and grid-tie sizing calculators to help you started.
Solar Panels Work?
Mono vs Polycrystalline
What can I power with
100W solar panel?
Read more +
|Product Name ↓||Volts||Watts||$ / Watt||Price|
|altE 5 Watt 12 Volt||12 V||5 W||5.83||$29.15|
|altE Poly 10 Watt 12V||12 V||10 W||4.90||$49.00|
|altE Poly 100 Watt 12V||12 V||100 W||1.19||$119.00|
|altE Poly 100 Watt 24V||24 V||100 W||1.89||$189.00|
|altE Poly 120 Watt 12V||12 V||120 W||1.41||$169.00|
|altE Poly 140 Watt 12V||12 V||140 W||1.25||$175.00|
|altE Poly 200 Watt 24V||24 V||200 W||1.14||$229.00|
|altE Poly 200 Watt 24V - SCRATCHED||24 V||200 W||1.34||$269.00|
|altE Poly 30 Watt 12V||12 V||30 W||1.63||$49.00|
|altE Poly 60 Watt 12V||12 V||60 W||2.32||$139.00|
|altE Poly 80 Watt 12V||12 V||80 W||1.99||$159.00|
|Ameresco Solar 20J 20W 12V with J-Box||12 V||20 W||9.75||$195.00|
|Ameresco Solar 30J 30W 12V with J-Box||12 V||30 W||8.97||$269.00|
|Ameresco Solar 40J 40W 12V with J-Box||12 V||40 W||6.89||$275.74|
|Ameresco Solar 50J 50W 12V with J-Box||12 V||50 W||5.90||$295.00|
|Ameresco Solar 90J 90W 12V with J-Box||12 V||90 W||4.43||$399.00|
|Canadian Solar 255 Watt Smart Module with SolarEdge Optimizer||20 V||255 W||0.94||$240.00|
|Canadian Solar CS6P-250P 250 Watt Poly||20 V||250 W||0.84||$211.00|
|Canadian Solar CS6X-320P 320 Watt Poly||24 V||320 W||0.93||$299.00|
|Kyocera KD140GX-LFBS 140 Watt||12 V||140 W||1.97||$276.38|
|Kyocera KD145SX-UFU 145 Watt||12 V||145 W||2.06||$299.00|
|Kyocera KU265-6MCA 265 Watt||20 V||265 W||0.94||$250.00|
|SolarEver 50 Watt 12V Poly||12 V||50 W||2.38||$119.00|
|SolarWorld 260 Watt , Sunmodule SW260 Poly V4.0 Black Frame||20 V||260 W||0.94||$245.00|
|SolarWorld 260 Watt , Sunmodule SW260 Poly V4.0 Silver Frame||20 V||260 W||0.94||$245.00|
|SolarWorld 275 Watt , Protect Sunmodule 275W Mono BLACK, V4.0 Frame||20 V||275 W||1.31||$360.00|
|SolarWorld 275 Watt , Sunmodule 275W Black Mono V4.0 Frame||20 V||275 W||0.89||$245.85|
|SolarWorld 285 Watt , Sunmodule SW285 Black Mono V4.0 Frame - 5 Busbar||20 V||285 W||1.11||$315.00|
|SolarWorld 285 Watt , Sunmodule SW285 Mono V4.0 Frame||20 V||285 W||1.07||$305.00|
|SolarWorld 290 Watt , Sunmodule SW290 Mono V4.0 Frame - 5 Busbar||20 V||290 W||1.09||$315.00|
|SolarWorld 300 Watt , Sunmodule SW300 Mono V4.0 Frame -5 Busbar||20 V||300 W||1.10||$330.00|
|Sonali Solar 10 Watt 12V||12 V||10 W||4.90||$49.00|
|Sonali Solar 20 Watt 12V||12 V||20 W||2.95||$59.00|
|Sunwize SW-S40P 40W 12V with J-Box||12 V||40 W||3.98||$159.00|
|Topoint JTM190-72M 190 Watt||24 V||190 W||0.75||$143.26|
The term 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 ones that convert sunlight directly into DC electricity. Less frequently people will use the term in reference to solar thermal collectors or solar air heaters, the first usually heats a liquid such as water and the second heats air directly.
A fairly oversimplified way of saying how solar panels work is that rays of sunlight hit solar cells and push the electrons in the cell through the connected leads and wiring, creating electricity. This electricity is in one direction, so it is called DC for Direct Current, as opposed to AC for Alternating Current where the electrons are going backwards and forwards repeatedly, 50-60 times per second for the common household. That is why for most installations you need to have an inverter to change the DC electricity to AC and make it useable with your home's appliances.
Said less simply, on one side of the solar cell there's an overabundance of electrons and on the other side there is a lack of electrons. Solar module manufacturers create this static imbalance of positively and negatively 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 what ever you want to charge or power. Connecting the leads in itself to an electrical load, while closing the current path, does not allow to the electrons to flow despite the positive and negative imbalance. It takes sunlight hitting the silicon in the solar cells to loosen up electrons. And as soon as they a freed up they immediately start flowing through the wires to power your electrical loads. The more sunlight shines on the cells, the more electrons loosen up, the more electrical current flows and the more power it produces. Hot diggity.
We have created a handy, more in-depth overview of how solar panels work at our altE Solar Blog. It goes into some of the juicey details of not only how the photovoltaic effect works but also how solar cells work together to create different voltage options, and what all the various ratings in the specification brochures mean.
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 quickly review when they are practical for homes and when they're not. If you own home or cabin and you have (or a tiny home who can be parked such that...) a roof that roughly points south (north if south of the equator) with no shading by trees, hills, other homes from around 9AM to 3PM then you have some prime real estate for putting a solar array on.
The cost has dropped significantly in the last several years, making it such that with tax incentives or rebates a grid-tie 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, they will probably 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. That said, with advent of micro inverters and grid-tie inverters that have DC optimizers that are connected to each individual panel, some locations with a little bit of shading can still make good sense.
We wrote an article in the altE solar blog that cover this topic. Basically, it depends on what is most important to you - brand, price, efficiency, where they are made, quality of the solar manufacturing process, etc. We highly recommend giving it a quick read.