Review on MEGASOLAR 60W Solar Charger - Solar Panel with Charge Controller, Dual QC3.0 USB 5V - 12V, 🔌 and DC 12V 15V 20V Output - Portable Solar Charger Shoulder Bag for Laptop, Solar Generator, and Phone Charging by Gary Perry

Bought for camping, got hit by the rain so never used in the field. BUT operated under "laboratory" conditions, rear entrance! It took about 6 hours to charge the PowerAdd 32000mA from a dead battery. The cable with the panel kit was more than long enough to shield the battery from the sun and charge it as coolly as possible. Light enough to take with you on hikes, fits perfectly in a 70L backpack. I chose this device because it has multiple DC output levels. The PowerAdd is charged from a 15-24V input, slightly covered by the panel output!