Anker 24W 3-Port USB Portable Solar Charger (Open Box)

This is a difficult review for me to write because I own over 10 products from Anker, including 2 power banks, multi-chargers, usb-c docks, cables, card readers, etc… Everything I have ever purchased from them has been flawless, EXCEPT this solar panel. For months, I kept trying this panel and having no luck, but I always assumed it was because the sun wasn’t direct enough and/or if I had it inside that somehow the window was affecting the performance. I finally had enough after having this out in Yosemite national park on a day without a single cloud in the sky that was in the low 90’s outside. The sun was direct/hot and all other solar items I had were charging super fast. I left this panel out there connected to a single iPhone with a 3ft cable for over 10 hours, with my iPhone showing the charging icon the entire time. The result was that my phone lost 5%. After contacting Anker support, they offered me a 30% refund. This is well within the year warranty (I’ve only had it for 5 months), but they can’t offer a replacement and would not agree to a full refund, no matter how hard I pushed. This happens to be the first Anker product that I’ve had that’s needed support, but now this has me really nervous to purchase anything from them again. If you get a working product, you’re golden, but if you don’t, it’s likely you’re only going to get a portion of your money back and would have wasted the rest. Are there any reliable brands anymore? Anker, you just broke my heart LOL.