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20 Watt Black Frame Mono-crystalline Solar Panel and Battery Charger

20 Watt Black Frame Mono-crystalline Solar Panel and Battery Charger

  • 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

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

List Price: $ 199.00

Price: $ 109.00

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This Post Has 2 Comments
  1. 15 of 16 people found the following review helpful:
    5.0 out of 5 stars
    Solar PV System Casa de Baja, May 26, 2008
    By 
    L. Anderson “BajaSurfer” (Baja, Mexico) –
    (REAL NAME)
      

    This review is from: 20 Watt Black Frame Mono-crystalline Solar Panel and Battery Charger

    Location:
    K55, Baja California, Mexico

    Purpose:
    Reduce dependence on buddy’s noisy & smelly gas generator during weekend trips to beach shack. Week of rest after every usage.

    System [June 2008]:
    -> 60W total [~3.5Amps]. Two 20W [18Vmp] panel & two 10W [18Vmp] panels of the same mono-crystalline construction. [16AWG]
    -> Morningstar MPPT 15 Amp Charge Controller. [14AWG]
    -> Two [2] new 12V ~100AH deep cycle batteries [parallel ~200AH, 1/0AWG]
    -> 700W AC inverter [4AWG]
    -> 3.5KW gas generator to 6Amp AC batt charger for extra charging capacity when needed

    Current Load:
    -> Three [3] 12V x 26W fluorescent fixtures
    -> Two [2] 12V x 15W fluorescent fixtures
    -> One [1] 12V x 11W fluorescent fixture
    -> One [1] 12V x 13W fluorescent fixture
    -> Yamaha 2.1 speakers, 25W
    -> Dual-port 12V car cig lighter adapter for mobile phone/iPod chargers.

    Notes:
    Panels are fixed @ slight SW & angle of ~35° from horizontal due to wind concerns, more than output, but very close to local latitude of ~32°. I was at the Baja house when the winds started the raging fires in SoCAL [2007], it was bad.

    Voltage reads 20-24+V @ 3.4-3.6 Amps pre-load between 10:00AM & 3:30PM in June. Current load is lighting- OFF & ON 3-4 hours per night. Usually only one or two is ON at any given time. Lights work very well, almost like normal house. iPod is self-powererd to Yamaha 25W 2.1 speakers on inverter for 2-6 hours during day. Currently, we must use generator for TV/movies/games.

    Expansion:
    Another 20W panel for 80W total went in Dec 2008- another 80W will conclude a 160W system. Goal is 3 to 4 times per month…lighting, music, & occasional 26″ 60W LCD using 15W DVD player & 25W 2.1 speakers for movies when surf is flat. [~700-800 Watt-Hours/day]

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  2. 15 of 18 people found the following review helpful:
    4.0 out of 5 stars
    Power point is a little wierd…, August 18, 2008
    By 
    William Yerazunis
    (REAL NAME)
      

    Amazon Verified Purchase(What’s this?)
    This review is from: 20 Watt Black Frame Mono-crystalline Solar Panel and Battery Charger

    The panel took about a week to arrive; the packing was “wierd” (bubble wrap wrapped
    around the cardboard! ) but it was intact.

    The frame is aluminium, however the backing is plastic and the front side is glass
    (not Tefzel). The whole thing is sealed with copious amounts of silicone rubber.

    The wierd part of this panel is that it’s _not_ exactly a 12-volt panel. In
    full noonday sun, it puts out 20 volts open-circuit, at 1.03 amperes. This is
    somewhat higher in voltage and lower in amperage than many would prefer; you will
    need a charge controller at the very minimum as this _will_ cook a 12-volt
    battery if used for a long time. Be sure your charge controller can handle
    it- most charge controllers are rated for 16 to 18 volts input and this panel
    puts out 20 volts or a bit more.

    The panel comes with a pair of 6-foot wires (with something written on them
    in Chinese), one red, one black, and permanently attached to a box centered in
    the back of the panel. The other end of the wires go to a pair of alligator
    clips, but as warned above, don’t just clip these onto a lead-acid battery
    for long term use unless either the battery is really big or you have a
    charge controller.

    A downside: lead-acid batteries typically charge at 14 volts; any additional
    voltage is wasted. So, this panel loses about 30% of the energy produced
    if the charge controller is not an active (buck-boost) or maximum power point
    tracking (MPPT) controller.

    On the up side, the 20 volts open circuit stayed pretty solid even when
    the sun went behind clouds; what dropped was the amperage (down to 0.2 amps
    when the array was shadowed, down to 0.1 amp when the sun was _behind_ clouds.
    But the voltage stayed up, which means that even on a cloudy day your panel
    will get something into the battery, maybe only 10% of a good bright day but at
    least something. I think (but am not sure) that this is because it’s a
    monocrystalline panel.

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