Newpowa 100 Watts 12 Volts Polycrystalline Solar Panel 100W 12V High Efficiency Module RV Marine Boat Off Grid

This 100 watt panel has exceeded my expectations. The quality of construction is top notch. Wiring and cable connections are excellent. Great value for $80. Here are some quick lessons learned on how to maximize your power production with this panel:1. Be aware that there are 72 cells on the panel (4 across and 18 down). If even ONE of those 72 cells has a shadow or leaf on it you will cut your total power output by 50%. I repeat that if one cell out of the 72 has a shadow on it you are severely limiting your output. For optimal power output of continuous 6 amps you need to have full sunlight hitting all 72 cells (rectangles).2. I can routinely get steady 4-6 amps of power from this panel for 10 hours a day in bright sun.3. My best decision was to mount this panel on a lightweight and mobile frame that I can move left or right and up and down to manually track the sun during the day. I have the panel on my patio in full sun from 8 am until 6 pm. My panel is facing southeast at 8 am, rotated about 40 degrees facing south at 11 am and rotated another 40 degrees facing southwest at about 3 pm. This simple manual tracking system TRIPLES my daily electrical output to my battery compared to a fixed and immovable installation.4. The panel will produce small amounts of power (1 to 2 amps) even on overcast cloudy days.5. I use this panel to keep my 100ah deep cycle battery charged and when using my 2000 watt inverter I can run (one at a time) all my power tools, 1000 watt microwave, 1400 watt vacuum cleaner, 900 watt coffee pot, operate LED lights, charge my phones, etc. The key to success is only using these items during the day (except the lights) when the panel is simultaneously charging the battery. I can even run a 5000 BTU air conditioner or a 750 watt space heater for about 2 hours before it starts to wear down my battery. I always keep an eye on my charge controller when using high drain devices to make sure my battery never gets drained more than 50%. This panel can always “top off” my battery to 100% before sunset each day.Solar power is great, but it requires constant supervision for success. This is a very good panel.

Works very well. I am not disappointed at all. Great buy.

Very happy with these panels, well made, durable, and a great value. Have bought 4 of these so far and will be buying more for two off grid projects I have. Power output is as expected. There is a 1 star review that simply doesn't get it. Wattage is voltage x current .... Not the voltage you want, the voltage the panel puts out. Pretty much all panels put out 17 to 20 volts. The solar charge controller does the down conversion, you still get 100W at13v in the end to charge your batteries.The example of voltage is incorrect too, AC voltage is around 118vac RMS, anywhere from 110 to 125 can be expected depending on where you live. That's not 125v peak. Peak voltage for 120v RMS is 170v. He needs to read up on a voltage and dine waves in addition to what wattage means. He says he still stands by his comment, so given that, I would disregard his rating and his review. These panels are good.

It's really too soon to say if these panels are worth the effort and money. I'm just starting out. A hobbiest really. I haven't installed the panels permanently anywhere yet. I'm still trying different locations and angles. They appear to be made well. I'm a little disappointed in their output. At peak sun I'm only getting about 120W for two 100W panels. I don't expect to get 100W out of each, but 60W in mid-July seems pretty low. It may be that I have yet to find the best location for them. But I am happy enough with them to have ordered two more.

This panels output voltage measured was 20.3 volts at 5.96 amps. At the price point and measured output this panel is a great value.

When I got the solar panel, I naturally decided to open up the junction box to see what kind of diodes (Blocking or bypass, if so how many) were in the panel. The box was not held together by screws, but by plastic locking tabs that broke when I opened the box (it took a good deal of force). After getting the box open, I found that the panel has not one but TWO bypass diodes so that it can generate half power even if partially shaded. The diodes are quite large and look like they could easily take the panel's short circuit current. After breaking the plastic tabs, the box holds together just fine with self-tapping screws (why couldn't they have used screws in the first place?).As for power output, these solar panels seem like they will live up to their ratings.[EDIT] They did. Today, under full sun, I measured 104 watts AFTER the MPPT. These are legit 100 watt panels.There are several reviews saying that these panels only put out 63 watts. That's what you'll get if you're running them off 12 volts with no MPPT. If you want the full 100+ watts you MUST use a MPPT.

I have six of these and Im running them in parallel. They are mounted in a partially shaded location and running in parallel helps keep the output up when dealing with shading. I bought them at different times and noticed a difference in the wiring in the box. The first two I ordered had screw terminals for fork connectors. The other 4 have the wires soldered directly on the positive and negative leads. Not a huge deal but something I noticed. You would have to re solder them, or use butt connectors if you wanted to use different wires, which is not likely because the standard mc-4 connectors are prevalent for this type of panel and installation. They generate full output when under direct summer sun.

Para mi campera...cargo sin problemas mis baterías..

permet de faire fonctionner une petite pompe 12V

La compré para cargar una bateria de 12v 18A y alimentar la tv del salón. Los resultados son muy buenos. Me carga la batería pronto (con condiciones óptimas) y me permite tener la tv encendida de día sin problemas y por la noche 4 horas de uso con la batería. Muy bien.

Il pannello è stato installato in un piccolo impianto fotovoltaico. Funziona perfettamente molto meglio di quanto mi sarei aspettato.

Hab 2 Stück auf dem Transporter und ist einfach zu installieren und funktioniert mit Sehr wenig sonnen Licht schon