100W 12V Monocrystalline Solar Panel with Solar Connectors, High Efficiency Module PV Power for Battery Charging Boat, Caravan, RV and Any Other Off Grid Applications

So far the panels are doing their job as they were intended. I'm happy with them and the price was good.

First thing I did when these arrived was plug them into my Bluetti battery, one at a time, this was later in the day, but both were showing 80W on the battery, this is a good start because the conditions were far from ideal. Next day, I fitted them to my BougeRV adjustable stand, on a homemade wooden trolley, as the photo shows, and connected them in parallel, then plugged in, 140W from early in the day, that's a very good result, they typically then managed around 175W in relatively hazy conditions, if you get the occasional cloud, you might witness 'cloud edge effect', this can get them to over 200W when connected as a pair, but in general in full sun I get at least 160W for most of the day, they will peak at 180W a couple of hours around midday, but definitely the average in Southern California is 160W from 10am to 4pm, during winter and of course longer during the height of the summer, peaking at around 10+ hours at an average 160W. My trolley stand does allow me to follow the sun, which is a major benefit, value for money these are incomparable, at $0.50 per unit of electricity, and generating between 1 and 1.6 units a day, payback is easily going to be achieved in less than a year. I love these panels so much, I've now got a total of 10, all producing enough to mean my electricity bill for a 4-bed house, with me working at home on computers all day, is around $40 a month, excellent.

UPDATE: First purchase was 11/22/24: Today is 01/06/25: I've been using two of these panels for about 4-6 weeks. Normally, they keep my Acemo topped off, but the last two days were cloudy, and I discovered this morning that I had a bad wire connecting to the panels. It is currently 4:30PM and the sun is well over the other side of the apartment leaving the panels in the shade pointed away from the sun. You can see the reflection of the sun in the clouds. If I backed up, the sun would be just below the clouds on the right. Even in the shade, the two panels are charging the Acemo at 25 watts, now that I replaced the wires. I often get 30-35 watts in the shade, but I'm not getting much reflection today. During the morning when the sun is shining on the panels, I get up to 135-140 watts. When I mount them on the roof below them, they will get more light while the sun is overhead, and during the summer, they will get a whole lot more sun, for several more hours a day. The online calculator for this area says the best I can hope for is 60-65% of the panel's ratings, so 50% is the most I had hoped for and I'm over that mark. I currently only power a few things on the Acemo to keep it exercised. It's primary purpose is to provide power when the grid goes down. With 4 panels, I hope to remove my computer station and lights entirely from the grid. I have them, I may as well use them. My original plan was to hinge two of these panels together for a portable array, but they are really too heavy to port around easily, so I'm going to leave them mounted to the low roof and power my apartment as much as they can. I've seen complaints that someone received different panels when he ordered at different times. I ordered one single, later one pair, and most recently, one more single. I can't tell the difference between any of the panels. so I have not had that issue. The input to my Acemo is just shy of allowing me to use two panels in series. That's ashamed, because I would love to pair them up instead of running all of them parallel. The bathroom scale says that each panel weighs 14.4 pounds. Original Review: I now have 3 of these panels. The first one is in the window and the two new ones are #1 and #2 in the first picture. I was getting 83 watts of charging into my power station compared to 30 watts from 50w panel #3 and 70w from 100w panel #4. They weigh 14.2 pounds by my scale, but the other panels did not reach the minimum measurable weight on my personal scale. The two yard sticks are in the pictures for anyone wanting to compare sizes. For this time of year, 83w is about the most one would expect to get at this latitude this time of year. It probably helps a bit that the temperature outside was only 32 degrees when I got that reading. The wall you see the panel laying against is facing east. In the afternoon to evening, it is in the shade. During mid-afternoon, it was still charging at 25-30%. Of course, when the power station hit 100%, it quit charging. I read some of the negative reviews and they complain about low power and a weak frame. It's hard to know why someone had low power. There are a lot of factors to consider. As for the weak frame, these panels do seem heavy for such a thin aluminum frame. Panels 3 and 4 have the same frame material thickness as this one does. This one seems much heavier. Right now, I am satisfied with my purchase and I am especially happy with the price.

So far, a solid panel, especially for the price! Testing right out of the box with my multimeter in direct afternoon sunlight, I’m getting 22.1v and 6.03A, for 121.2W. The cables are shorter than I would have liked, but they are made with nice sturdy wires, and solid connections. They are nice and light, which is great for setup, and using them in the RV. 9bb, as described, so far it works works very well. I will update once I get some measurements in low light conditions, as is common up here in the north. If the PERC technology outperforms my standard panels on the cloudy days, I will update you 5 stars!

5/3/2025 - Just installed and everything test good. Great power output. I can't give specifics because I'm running this one in parallel with a Grape Solar 100W panel that is 4 years old and I got combined output from the two at least 150W before clouds arrived. I mounted these onto my roof with Unistrut rails and these hold-down clamps (https://www.amazon.com/dp/B0DQL39VTV). Very impressed so far. If mounting on a camper/van, I would not mount directly through the thin aluminum frame holes. Use more robust solar panel clamps like above and ensure those clamps are near the front of the panel to reduce potential for wind to lift the front and break the panel. For normal use, the frame is certainly strong enough.

Performs as advertised, high quality and great price.

Bought these to experiment with my EcoFlow River - after watching quite a few reviews on YouTube of the various 100w panels this brand seemed like the best mix of quality and price. Once they arrived I was not disappointed - I can use just one panel, or put them in parallel ( with an additional cable ) to use together. I do not have them mounted and just bring them out and lean them against the house on sunny days. Overall heavier than the Ecoflow foldable panel, but less expensive. Because they are in a frame they can me propped up easily and stay where I put them. The company ran a special about a week after I bought them and they were easy to contact, and did not ignore me. They did give me a little credit to match the special they were running. Overall they seemed easy to work with and reasonable. I am really happy with the quality, and the amount of energy I can get out of the panels when it is sunny. Of course the entire panel has to be in the sun, outside and not shaded for best results. The ecoflow will show you how much power is being produced and you can optimize the placement and angle to get the best results for your location.

HQST used to make really good panels but now I'm not for sure anymore. The panel size I ordered 3 years ago was 40.03"x20.07" which used to be the norm back then, now it's a totally different size. I absolutely loved these panels, because my voltage on a 12v panel was anywhere from 21.78 to 22.04 volts per panel and was amazing to get so much power out of them. With 9 panels wired in series I was getting 198 to 203 volts just on 1 array of panels on a 72 volt system. Unfortunately, my lawn mower hit a rock that I didn't see and it destroyed one of the panels and I can't get the correct size replacement for it. I've be searching for over 2 weeks trying to find a replacement panel with no luck. When I first installed the panels 3 years ago, I spent days making the locking and sealing mechanics to lock the panels in so if one of the panels became damaged, I could unlock it from the mount and install a replacement in less then 3 minutes, but I can't because they don't make that size anymore. So I'm extremely mad at HQST. If you make good product, keeping making it and don't change it.