I initially got the 400w version as part of a bundle with the F2000 on a prime day deal. (To get a good deal, wait for sales such as Prime day or Black Friday)

But the 400w solar panel is quite big and heavy and has a bit of a design flaw. The leg stands that fold out should have been made shorter because they just hit the ground when you try to fold them out, which makes the whole panel a quite precarious to set up! What you can do is tilt it slightly forward as you pull each leg backwards, but it's still not a great design in this respect and sometimes the whole thing just flops over when you are setting it up. They switched to snaps to lock the stands at various angles and this does work pretty well since you can adjust them first to lock the stands, and then angle the panel backwards or forwards.

Mainly, the 400w one is a bit too big and bulky to conveniently move and set up. This is why the 200w version is easier to work with. It's the same design, but weighs less than half as much and is just overall way easier to move and set up. You are better off with two 200w panels than one 400w. Even to transport, two 200w panels seems more doable than the one 400w, which is huge. That's what I ended up with, two 200w panels.

If you have an Anker power station, these panels are optimized for it since they have a high voltage. They are also water resistant so you could even leave them out in the rain without issue.

I recommend the 200w Anker Solix solar panel.

Super sturdy, looks waterproof and well constructed. Tried it indoors and a very low voltage, outdoors very near the capacity (100w). Impressive. worth adjusting the angle, it does make a difference.

I ordered two of these 400 W solar panels. They're super easy to move around, and they were very helpful in charging batteries during a three-week power outage recently.

So far all is working with my Anker Solix f2600 and equipment was well packaged with a nice Thankyou fro the employees., still have to instal the solar panels but no rush the f2600 works great as a UPS system.

Other’s have given this panel bad reviews in my opinion mostly due to their ignorance.Educate yourself not only on the panel but also how solar energy works before you slam the panel.I purchased the Anker 767 generator for emergency uses not for “off the grid” uses.Due to my needed application I wanted portable solar panels for my 767 generator so I purchased three 531 200w panels.I considered other brands/panels other than the Anker 531 to charge my 767 generator primarily due to the Anker panels are a tad pricey.I also consider the Anker PS400 400w panel but it being about twice the price of the 531 200w panel I thought it best to stay with the 531 200w panels.There are certainly other panels out there other than Anker panels that can be used to charge the 767 generator.You just need to understand what the requirements are for the 767 generator so as to purchase panels with the right specifications.There’s no doubt there are cheaper quality solar panels out there and I know this as I have quite a few non-Anker portable and fixed solar panels.However these panels are made with the Anker 767 generator in mind so that direct compatibility is a big plus for me.Compared to other cheaper portable panels I would consider the Anker 531 panel to be a “heavy duty” version in construction.Since my use are for emergency conditions only I wanted a panel that was not only portable but built to withstand harsh conditions which the 531 panel I believe meets that criteria.As far as setup goes these are easier to setup and adjust than other portable panels I have.However as with all portable panels you’ve got to work a bit to get them set just right for maximum efficiency.All 3 of my 531 200w panels in optimum conditions put out an average of about 170 watts each.If you do some research I think you’ll find that 85% output efficiency is very good for a portable solar panel.In conclusion; if your application is for a portable solar panel the Anker 531 is a very good choice.However I would only purchase these if your application is for emergency uses not for a full time “off the grid” application.For “off the grid” application I would recommend going with a fixed panel which I believe will run about half the price of the Anker 531 potable panel.