With its convenient briefcase design and weighing in at just over 2.5 kg, these high quality monocrystalline panels pack up to 50W of solar generating power into a lightweight yet rugged package! Easy to carry with you on camping, boating and beach trips, the SP50 is designed specifically for use with our PS300 portable power supply, but can also power virtually any battery via the included solar charge controller. Paired with the PS300, it can achieve a full charge within a day of full sunshine. Experience the freedom and peace-of-mind of knowing that you can go anywhere your sense of adventure takes you while still enjoying the comforts of home like smartphones, tablets, lighting and much more. Happy travels!