Whilst I think the panels are nice and portable I find the position of the charge controller a bit less than desirable - if you try to plug something in you're practically lying on the floor once it's set up to see the charge controller - and there is nothing on this controller that tells you anything about anything. There is mention of a small light coming on - I haven't seen that when I use them, but the items I charge seem to charge. It would have been preferable to move the charge controller to one of the top corners and a more robust converter with readable/digital images to know what's going on would have given this unit value.