I recently purchased a 150W battery-free power system, which has demonstrated remarkable reliability over the past year. Although the manufacturer advised indoor usage, I have effectively employed the system outdoors under shelter with outstanding results. The system has enabled me to charge numerous devices daily, such as LED light strips, phones, tablets, Bluetooth earbuds, and even my computer. By connecting it to a USB/110V AC power strip through an inverter, the system's performance has exceeded my expectations. I would certainly contemplate acquiring another unit in the future.