When you just need a little more grunt to keep the lights on, Rentoza's QVWI S500 portable power supply subscription is your friend.

Cased in aluminium and with a carrying handle for easy transportation, the S500 is ideal for powering more for longer. Thanks to a combination of USB-A and -C outputs, as well as AC and DC, it's designed to power anything you need. 

Keep the lights on when the sun goes down with Rentoza.