Friendly weather and day today. The setup works fantastic even with just two panels, possible are 400 Watts in total. From the moment on the sun crawled over the roof, the show was on, and got hot soon. I set up some wire magic and so at the same time charged a bicycle battery with a capacity of 500Wh, ran a wire with seven lamps 2W per on it plus one 6W lamp (which was de facto my complete living room lights), cooked 4.5 liters of water, all that on AC, and the DC with the many USBs I used to charge a smartphone, a tablet, a pocket torch, a bicycle front light. For fun, I had the vacuum cleaner on for a few minutes, too. All at the same time. I then ran out of possible consumers. The fridge, maybe, I forgot.
Simultaneously the panels charged the battery. I could, if I only had a car, charge simultaneosuly with the panels via car, or wallmount: you can run two charging ways at the same time. But two of three panels already did the job, and while I stressed the battery and emptied it to 50% or so, most of it already is rechgarged again and I am absolutely certain before the sun gets too low again the battery will be filled up again.
Works much better, way much better than I expected. There will be greater losses on more grey days, but in serious situations I would then ration the battery power anyway, and find a way to set up the third panel as well without it being shaded.
Very happy customer. Expensive, but no hassle with single electric items, and no handcrafting and manual wiring. Here you get it all in one box, without any further work and need to think things out. Can only recommend. Took me five minutes to set up the panels this morning, and as long it will take to store them away and roll the powerbank behind a curtain. Super!
Food for thought, they offer also cheaper 120W panels, but these also have lower Volts. With only two panels I woul not get the needed Volts to get charging started. I would always depend on having all three panels out and all of them unshaded, and then have 360W at max and best conditions. With the more expensive 200W panels, I can vary between 2 panels (400W), and 3 panels (600W). Worth it, absolutely, in my living situation and limited place!
(One panel alone also does not charge.)
I think the model of this powerbank they sell in the US has not 2 but 6 AC mounts. Dont know any further possible differences, by looks the rest seems to be the same.