ALLPOWERS SP029 140W Portable Solar Panel Charger for Laptop Cellphone, Waterproof IP65 Foldable Solar Panel with 5 Output, for Solar Generator, Power Bank, 12V Car Battery

The more you know about how solar panels work, the better you can decide which one to buy. Solar panel output power is measured under very controlled conditions, conditions which are unlikely to happen in the real world. Solar panels also tend to produce more power when they are cold vs when they are hot, and they produce more power when they are not under load. All this is to say that when I got this panel at home, and checked it with my multi meter it produces exactly the amount of power that I expected. It produced so much more power than my power station could handle that it tripped the over power protection. once it warmed up a bit the power dropped and I was able to charge my power station without any problems. The next thing I discovered, the charge controller you connect your panel too is really the device that determines how much power you are going to get out of your panel. I purchased this panel in hopes that I could get a little over a 100 watts of reliable power into my power station, however I quickly realized that the power stations charge controller just wasn't going to let that happen. I initially thought the problem was with the solar panel, but later realized it wasn't even a "problem" it's just the way the power station ( a small portable station ) works. I say all this to help explain my rating, I like this panel, it works well, it's light weight it has pretty good build quality and it has the ability to charge a phone or similar devise because it has a built in charge controller (their words, not mine) Like many other reviewers have mentioned, the light weight build means that the panel will tend to droop or sag when you use it with the built in kick stands, this is of course not a problem if the panel is just lying flat on the ground or hanging using the sturdy grommets. The bottom line is the panel works fine. As I understand solar panels more and more, I understand that you can't expect to get a stable reliable 140 watts out of a 140 watt solar panel, you need to over size the solar panel by some amount, or buy multiple panels and connect them in parallel or series (if the panel is rated for either of these options) to get a reliable amount of power. Also like I am beginning to realize, you might see better overall results if you pair your solar panels with a quality charge controller, one or two lithium batteries and a good pure sine wave inverter, instead of or in support of using a portable power station, of course this depends upon your needs, the space you have available and your situation. But back to my rating, the droop and sag when using the kick stands is why I would, if I could, rate this panel at 4.5 stars, but because it does work and works as expected I'll round that rating up to 5 rather than down to 4.

I'm using these panels with my Bluetti Solar generator and to augment my permanent solar array as needed. The panels are very easy to setup and provide several cables and connections that should allow for connectivity to most solar generators and solar arrays. The panels are water resistant and have an IP65 rating. I have used them during a light rain with no adverse effects. Make sure to fully zip up the cable pouch on the back because these panels sport a small power block with 2 USB ports and two 18V DC ports. If water gets in these ports it will likely short them out or even the whole panel, luckily the zipper is water resistant. The internal power block has Dual USB ports (5V/2.4A per port) for charging your 5V powered gadgets, and 18V DC output (18V/3A) for charging your laptop or 12V car battery and portable generator. The built-in power block is very handy, you can take these panels camping and charge your portable devices directly from the panels without having to connect a solar generator to collect the power. A very handy addition to the panels. I was able to get 120W from direct solar exposure and around 14W on heavily cloudy days. I'm hoping with the summer sun I'll get closer to the 140W promised. These panels aren't as good at harvesting power as my Newpowa traditional mounted panels but those panels aren't portable and much heavier. I suppose you have to give up some efficiency when you add ultra-portability. Because this is a 3 panel array it is a bit heavier than my AllPowers 100W foldable panels but when folded they are actually smaller (see pictures). The panels are light and the built-in storage case and power block make them very easy to transport and use to charge multiple devices at once. Since I use them to charge my Bluetti and augment my solar array for faster charging of my LFP batteries they fit my need and work as expected I just wish they were able to generate more wattage in direct sunlight. But for the price and form factor I'm happy.

Very good for the price, bought from warehouse "excellent condition" and it did come in excellent like new condition. Shipping was as fast - got it next day All the MC4 connectors are useful, especially the MC4 to Anderson to my solar battery bank. Initial testing on early spring day 11am with clear direct sun and 10C temp: My MPPT solar bank is getting 102watts input. Pretty good for these conditions and meets my expectation that this will at least get 120watts max input to my battery when camping in the summer! All the charging ports right from the panel is a huge bonus, very nice touch, and will sure to come in handy one day in a pinch for charging a laptop etc. Ordered another one.

Vary portable and you even get a space-pouch for the cables vary simple to set up and use and store afterwards

Overall the solar can generate power to charge battery banks, and other camping electronics. Customer service is fast to respond, and do their best to resolve your issue. I originally contacted them month after purchase with an issue, and got a partial refund. I contacted them more than year later as the panel was struggling to produce energy in direct sunlight and they sent a replacement. If you're charging regular devices I recommend using the USB-C port. Otherwise use the DC connector for solar generators, and laptop, etc.

The spec printed on the panel itself shows this is a 130watt panel, not 140 watts: Max Power Voltage (Vmp): 19.5 Max Power Current (Imp): 6.67A 19.5V x 6.67A = 130 watts Testing will full afternoon sun, clear skies, no clouds no shading: Getting 110 watts into MPPT solar bank Supplied cables does NOT provide one needed to charge most solar banks. No MC4 to Anderson nor MC4 to large barrel 12v cable is supplied. What is supplied: - MC4 to battery clamps (mostly useless, no one knowledgable would ever connect a solar panel directly to a battery without a controller or voltage limiter in between) - MC4 to XT60 (very few portable battery banks have this connector, it is mostly found on escooter/ebike batteries, so again useless for most applications, and again you don't want to directly connect a solar panel to an ebike battery) - MC4 to standard 12v barrel to connect set of device charging tips provided for laptops etc. The 4 subpanels are not completely ridgid, easy to bend/crack a cell when trying to set up or fold up the panel, difficult to handle because of this Summary: It's ok if you can accept all the above limitations, but too many gotchas

This is a good solar panel. Is 140watts. I tested it in winter in full sun. I got 110watts which is pretty good. Is well built, sturdy, feels worth more than I paid and cheaper than anker, ecoflow and bluetti panels. Win. Solid. Even with my dog blocking half the panel soaking in the sun( huskey) it still made 70watts. I'll take it.