DOKIO100w 18v Portable Foldable Solar Panel Kit (21x28inch, 5.9lb),Solar Controller 2 USB Output to Charge 12v Batteries/Power Station (AGM, Lifepo4) Rv Camping Trailer Emergency Power

Quality seems pretty goodStill pretty big even when folded up, wish if folded up smaller, even if it was thicker because of that, would make it easier ti transport.So far ( I've only used it 2 or 3 times ), the best I can get is about 160,-170 watts from it.

Since they arrived, I've been quite cautious with my panels, given the mixed reviews, reports of very little power delivery (both initially and degrading over time). I suspected that the people reporting decreased power production over time may be over-bending and over-flexing their panels, damaging them over time.I've been using my panels for a few weeks now, and so far, my experience has been very pleasant! I also have made sure not to bend or flex them, avoiding leaning them against anything (esp at a harsh angle). So, I've really just placed them on top of my van.I've been very happy with the power delivery. I have been sampling it over different days in different conditions:- Midday, light clouds: 128W-149W @ 16-17V, giving 8-9A. (see images of screenshot for example @ 146.2W, and the partly cloudy sky)- Early morning, full sun: 90W @ 18V, giving 5A- Midmorning, very cloudy: 40-65W @ 16-17V, giving 2.5-3.5A- Summer evening, cloudy, tree coverage: 20-40W @ 16-17V, giving 1-2.5ASo, I was shocked. I've seen it get up to 160ish Watts, and never expected to see more than 75% power (150W). So I was happy with that. And I'm also surprised that even with pretty heavy clouds, I was pulling in roughly 3A. Since I'm mainly planning to run my laptop and phones, (and possibly a small fridge), even this 3A is enough power for me if I let the panels run all day.One other location I was curious about was placing panels on my dashboard. I want to try exposing just a single panel, hoping that it can fit on my dash without shadow. 2 unknowns: I don't know how much my windshield will block the light, and I don't know if 1 panel can pull 1/4 of the full power potential. My understanding is the panels are wired in parallel, which is excellent, because they're essentially operating independently, or additively. (If they were wired in series, that would mean whichever panel had the lowest power, that would be the max power possible from every panel.) Still, in practice, I think I'm getting less than 1/4 power from the single panel. My thought is that the full panel covers so much ground, it's more likely that at least 1 panel will receive good light. However, the smaller footprint of the small panel will only pull 1/4 power when it's getting full sun. In other words, in full sun, I suspect the single panel will pull 1/4 of the 4 panels. But with any clouds, having all 4 panels present will actually help maximize power.I have a LiFePo4 battery, so the included charger won't work. Still, I'm happy to have this junky little charger in case I want to drag the panels out to the beach, providing USB power, or for emergencies to trickle power into my car battery.It would be nice to be able to lean these panels against a wall, or the side of my car. I'm just too nervous that I'll damage them with flexing. I'm thinking about creating something out of some old tent poles, but haven't yet landed on a design that I'm excited enough to build out.The other day, I came outside to find the panels had blown off my van and were just laying in the lawn. They seem to be still functioning fine. So, I'm happy that the panels are sturdy enough to withstand a 7 foot fall onto grass. I also need some basic solution to keep 'em strapped down, because I don't want a $200 kite.In terms of the quality, I'm pretty happy with the fabric itself, the quality of the handles, etc. The little metal rings seem pretty flimsy, but I can work with that. And some of the stitching is coming undone, leaving some dangling threads around. Again, I can mend that and deal with it.Overall, with a couple underwhelming features, I'm more than happy with the power output. Nothing in this price ranges is even close, and I can't even find another panel offer this kind of wattage.

We have had this for over a week. We just today mounted it on our porch awning which has a 10% tilt angle which isn't the best, but it's better than laying it on the ground. In the many previous days of testing, we had the panel on a 10+ degree tilt toward the bright sun, and got a max of 60+ watts only. After a few days of the same, we blocked each individual panel to see if ALL the panels were registering. Using our sine wave display of our solar battery, the end panel (farthest from the panel that has the pocket) didn't even register more than a 5w input! We then blocked the remaining three panels and it registered between 40>50+watts. So it seems one of the panels might be not functioning correctly.... has anyone else had this problem? In bright sunlight with a clear sky, the most we registered as a whole, was almost 70w but that was a very rare and very occasional 70w. I'd like to know what others are getting! Still is nice to be able to charge the solar battery enough to power hand devices and we have even used the panel to charge household ceiling lights and more. As forementioned today we finally were able to permanently mount the solar panel on our porch awning, and with still bright early afternoon sunlight it is registering NOW a highest input of 30-40watts to our battery, which is a EnginStar 298Wh pure sine wave 300W power station.UPDATE 22NOV2022: We decided NOT to take down off the outside awning and days ago recevived up to 10+inches of snow. YES, the solar panel was covered with abt 2+" of snow. On the same day of the WNY-Buffalo snowstorm, we plugged in the solar battery to charge it, and tho it was tiny single-digit watts in, the battery was charging off the still snow-covered panels! The next day we think a bit of the snow melted as the in-wattage increased - a very TINY bit - but nevertheless: STILL charging! Now we are at 2days after the snow November, and as the sun is shining down on the panel, it is STILL charging and at a low double digit wattage. It's been covered with snow for 2days but still charging our battery! Eventually, the 300w solar battery was charged in three days!UPDATE 7Dec2022: Using a different 300w solar battery with a "builtin MPPT", today on an overcast day we saw the HIGHEST wattage input from this solar panel since its purchase: almost 96w!!Once Spring decides to stick around permanently, we will be removing the panel to angle it correctly. Another plan would be buying a 300w folding panel to replace this 220w panel & using this as a standby, and properly angle the new 300w panel properly to the sun. Will update with new data once that is once. The newer battery we picked up last Dec 2022 is the AMPROAD Epic 300 Power Station & gets a higher charging wattage consistently than the older EnginStar batteries. I also purchased last year a 600w solar battery BUT it kept going to sleep so it was reappropriated to a family member who could use it and bypass its sleep mode as is very electrically-savvy, moreso than me.23Apr2023: Purchased and just delivered earlier today a DAY EARLY my newest folding solar battery: 300w to supplement my 220w panel I've already had for months. Overcast/Windy today but went out anyways to test it with my AMPROAD Epic 300 Power Station and even on an OVERCAST day was inputting 100+ watts. Very happy and hoping that when installed next to the 220w, will give me the charge of the Sun I've been wanting. Only complaint on this 300w panel, it had a few scratches on one panel.