- Assembled professionally with Suntech Mono-crystalline solar cells (in a worldwide shortage
- TUV certified junction box with cable with MC connector
- By-pass diode to minimize power drop caused by shade
- Anti-reflective high transparency tempered glass
- Class II black color coated aluminum alloy frame
Product Description
This is a 20 Watt version of the Mono-crystalline Portable Waterproof Solar Panel in black color (very rare) aluminum frame to charge your 12V battery or to run your science projects. The rare black color frame looks very nice. It is in a factory new package and is 100% brand new. The solar panel is assembled by Suntech, one of the highest quality solar cell makers. It is also waterproof. The working voltage for charging is 18V. If you need to use it to charge a car battery, you may need a charge controller to prevent the battery from overcharging. Connections included: alligator battery clamps. There are three types of Solar Cells on the market. All our Solar chargers use the best – Mono-Crystalline Solar Cells. Amorphous or Dual Junction Solar Glass are the cheapest but are only 7% energy efficient and have 5 years service life. They are big and heavy. Poly-Crystalline have 25 plus years of service life under direct sunlight and are 13% efficient. Mono-Crystalline have 25 plus years service life and are up to 20% efficient. This is the same type used in solar car racing. This type of solar cell is now in a worldwide shortage because only a few companies can manufacture this solar cell.
 | US $174.00 End Date: Friday May-18-2012 19:10:41 PDT Buy It Now for only: US $174.00 Buy it now | Add to watch list |
Monocrytal panels are the best and last longest. This is an excellent price and is the cheapest 20w panel I’ve found. Get ‘em while you can.
Amazon User Rating: 4 / 5
Item arrived in record time and in good condition as of this time it is functioning as advertised. I would recommend this company to others and would order again myself.
Amazon User Rating: 4 / 5
I’m very pleased with the performance of the panels and with the way that they look. They perform quite well in portable applications and this is why they come with alligator clip connectors installed from the factory. Works great for charging batteries in diesel generators, car batteries, and even charging a deep cycle battery bank during the day for running a laptop at night. If you’re planning to run your whole house or do something substantial with solar power, get yourself a solar array with 120 watt or higher panels wired in parallel in a 12 volt system. These portable solar panels are good to tinker with so you don’t have to tinker on very expensive solar array systems that are better left un-tinkered with.
Amazon User Rating: 5 / 5
I purchased four of these solar panels. Three of the panels worked correctly right out of the box. The fourth one did not work, and upon some inspection, I found that one of the solder joints to a wire was not soldered. The solar panel had no power output. I repaired the solder joint myself, and now the fourth solar panel works correctly. Overall, I am very satisfied with the way these panels function. In the sun, they perform as expected. I will probably buy more of these solar panels in the future and would recommend them to anyone wanting a compact, powerful solar panel.
Amazon User Rating: 4 / 5
I like this product. It is simple. Out of the box in early January in northern Illinois I got 15-16 volts and 0.2 amps from this panel. That’s what I expected for this latitude and time of year. I’m relieved to have exactly what was advertised on the Amazon website. I just wanted a panel to charge up a 12V battery and see what I could run on it. By all descriptions this panel should work, we will see. For the money, I have not seen any other panel with a 20 watt peak output.
Amazon User Rating: 5 / 5