Charge the Jackery Explorer 240 in 9-10 hours via its solar panel. Then, power your laptop, phone, and camera over and over again. The Explorer 240 is a portable energy station that puts out 240 watts of power, with AC, DC, and USB power sources. It claims to charge a MacBook up to four times, an iPhone X up to 20 times, and a GoPro 35 times. Then, when the Explorer 240 is out of juice, hang its 50-watt solar panel to charge it back up. The Explorer 240 is on Amazon now for $300.