It should be brought in that disregarding of the size and dependability of the portable solar power station; they will never work without sunlight. There may be adequate power left over in the batteries once the sun goes down to run some devices or equipment, but without sunshine, once the batteries are discharged, one will have to wait till daylight to furbish up power. Still, it assists to have a portable gadget at the side which comes convenient in times of emergency.