I am able to charge my Jackery 160 solar generator in less than one afternoon with a single panel.I live in SW Florida and have been able to catch up to 60 W in perfect or near-perfect conditions, which is pretty good from a theoretical max 80W panel. Note that you will virtually never get 80 W out of this.I have been using this Big Blue solar charger for a couple of weeks now and it performs very well. It puts out a ton of power and recharges my large power brick very quickly. I could easily charge both my wife's and my phone off this every night and we have large folding phones so they use a lot of energy. This even produces good power on cloudy days which is something that I did not expect. This is a perfect panel to bring while out camping or to leave in your vehicle as an emergency charger because it will also charge up your car's battery. I could also see this as a nice-sized panel to charge up a solar generator while off-grid. It's on the heavy side, but built well and performs very well. It's a keeper!While I love the portability and the output options this panel provides. It has one major drawback it does not provide the full output, even close to 80w, on the DC output. The most I was able to get on a California full sun day was 25 W. ?I believe that they have limited the output to the DC so that they can provide power to the USB ports at the same time. Even though my latest test was using just the DC output .It’s a great panel is you are just going with USB, but if you need DC (over 20 W) look for another panel.Used this with a small power station for 15 days on the road. It fits in the front window of my Landcruiser almost perfectly and I connected directly into the power station using the provided DC to DC connector. I would plug it in whenever I was parked, and it kept my power station fully charged the entire time.Its a "little" unwieldy when trying to unfold it as its held together at each fold by magnets, but it is secure when carrying around. The stands are velcro, which can be a bit of a pain to undo on each side because the side you just undid will inevitably fold back and stick again. These are minor gripes, as I think this was built to be used outside the vehicle on the ground. Otherwise an amazing solar panel. Highly recommend.I bought the BigBlue 80W Foldable Solar Charger for charging phones, laptops, power banks and batteries during the frequent electrical outages I experience. On an ideal summer day, with no clouds in the sky, it managed to charge my Thinkpad Yoga to 100% in about 6 hours, using the USB-C port, which is quite phenomenal. The BigBlue's charging circuits are intelligent enough to detect if a device is compatible with various fast charging technologies, which means you can charge things about as fast as they can be charged, if you have direct sunlight. The included adapter kit makes the BigBlue compatible with a wide range of laptops, but not all - for example, it has no adapter for ThinkPads without USB-C ports. All in all, an excellent device!I tested the solar panel charging various devices I use when operating my ham radio gear when away from home: USB power banks, cell phone, Amazon Fire tablet, AGM lead-acid batteries and LiFePo4 batteries. I was able to change 3 devices at the same time but I understand this will lengthen the time to full charge each compared to charging only one at a time. I did not determine time required to fully charge each device with the solar array. Various adapters are included (power poles, ring terminals, clamps and others). My older 125 watt solar panel did not provide the extra connectors or MPPT controller. MPPT controllers can cost over $100. I consider the Big Blue Solar 120 W package to be a good value.Be aware of potential negatives due to the array design. 1, it is too big and heavey for backpacking. 2, the kickstand supports to hold the array towards the sun are flimsy. 3, the 12 V output from the MPPT controller supplies 60 Watts and not the maximum 120 Watts. 4, the instructions and the Big Blue website do not provide more detailed information. Considering these potential negatives, this solar panel meets my needs and provides a good value.I've only used it once, but it put out as advertised, a good 21 VDC unloaded, and 14VDC when connected to a hefty 12VDC gel cell load, that under decent sunlight and using all 4 panels AND that's not even removing the plastic covering that covers the solar cells. I'm sure that's supposed to be removed but for now - why? It's giving me lots of power even while reflecting some sunlight by the plastic covering, and durability is something I worry about when spending $$. Even closing two of the panels it was almost as good at voltage. The real trick will be endurance over time. But so far I'm happy with the purchase. It's a bit heavy though - not something you'd take backpacking! 10 lb in it's sleeve. I like the folding and the magnetic clasps that yet come apart under not too much pull - just right. It's thoughtfully designed and built and looks rugged.I was able to get 55 watts of DC solar output on a Texas winter day (with UV4). However, the USB-C output does not work, whether I tried to use it while also using the DC or whether I tried to use it alone. The DC output was okay since my Powerstation only accepts up to 65 watts of DC input. But it would charge faster if the USB-C output also worked. If this panel was half the price I would keep it, but for the price I paid I expect more, so I’m returning.Entweder habe ich ein Montagsmodell erwischt oder der verbaute Laderegler ist eine komplette Fehlkonstruktion.Es passiert folgendes:Schließt man an USB-A oder USB-C eine Powerbank zum Aufladen an, lädt diese in vollem Sonnenschein mit maximaler USB-Leistung, also 10 Watt (5V x 2A) bei USB-A und 15 Watt (5V x 3A) bei USB-C.Soweit, sogut...Nun kommt eine Wolke und die Ladeleistung sinkt naturgemäß und wie zu erwarten auf 5V x 0,4A, also 2 Watt. Zieht die Wolke weiter und das Solarmodul liegt wieder unbeschattet in der prallen Sonne, bleibt der Ladestrom jedoch bei lediglich 0,4A.Zieht man nun das Ladekabel ab und steckt es wieder an, wird wieder mit voller USB-Leistung geladen.Fazit: Das Solarmodul ist nur was für Leute, die den ganzen Tag daneben sitzen können und nach jeder Wolke den Stecker ziehen...So ein Schrott... Finger weg, schade ums Geld... Das Modul geht zurück...Bought this item to charge a poweroak 500wh solar generator, which on paper it should easily be capable of. Despite this, even in direct uninterrupted sunlight, it couldn't achieve more than 35 of the stated 63 watts. Weather conditions could have barely improved and so I cant foresee this item delivering more than 40w in the UK. Item replaced with a 100w alternative. For charging mobiles phones and powerbanks, this item is certainly suitable.Journée de juillet, plein soleil (couv nuageuse 55%, entre 11 et 16h, 46° nord).Test #1 avec Anker 10000 PD Redux (36,3Wh), neuf et vidé, chargé en 4h environ en USB-C. Le panneau a donc fourni près de 2A à 5V.Test #2 sur mobile de 15,8Wh (4080mAh x 3,87V), moins d'une heure pour 80%.En résumé le panneau délivre environ 10Wh pour ces équipements.Prochain test de charge : un laptop en 12V, les mesures seront en principe plus précises (acpiconf -i0)A suivre.Pour l'instant c'est un bon produit.Was die Umwandlung von Sonnenlicht in elektrische Energie angeht, leistet das Teil das erwartbare - z.B. wurden in meine für Solar-Speisung vorgesehene "Sunnybag"-Powerbank binnen eines Tages, den das Teil innen hinter einem Südfenster senkrecht hing, an einem teils freundlich, teils bewölktem Tag ca. 17 Wattstunden Energie geladen, also im Mittel eine Leistung von ca. 2 Watt, viel mehr darf man bei solcher Konstellation nicht erwarten.Ziemlich dreist gelogen ist die Werbeaussage "IPX4 wasserdichtes, staubdichtes Anti-Schock-Äußeres für den Außenbereich". Erstens sagt schon das "X" in "IPX4", dass für Fremdkörper überhaupt kein konkreter Schutz definiert erreicht wird - also nix mit "staubdicht". Die Aussage der "4" in "IPX4" wäre theoretisch "Schutz gegen allseitiges Spritzwasser" - dieser Aussage wird unmittelbar von einem Papierzettel in der Verpackung widersprochen, der darauf hinweist, das Produkt von Regen fern zu halten.Also klar, natürlich mag die Plastikfolie über den Zellen dafür sorgen, dass das Gerät nicht durch ein paar Tropfen Regen sofort kaputt geht. Aber einen richtigen Regenguß, erst recht bei Wind, dürfte das Teil allein deshalb nicht ohne weiteres überstehen, weil kein wasserdichter Abschluss des Fachs mit den USB-Buchsen gegeben ist.Man sollte sich vor dem Kauf darüber klar sein, ob man in der Lage ist, das Gerät während des geplanten Einsatzes vor Regen zu schützen - ebenso wie das Gerät, das angeschlossen und geladen werden soll.I brought this solar panel primairly to charge my laptop for when I am at events. I took two laptops with me neither of which could be connected to the solar panel. It did limp my mobile phone through but their would have been cheaper ways of doing that.