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Picked up a powerall great reviews. It has two usb ports, led flashlight, and can jump start a semi lol. There's all kinds of videos on it. Charges ell phones great and has no issues running light strips. Pretty cool for something that can fit in your pocket. PowerAll Vs.Kenworth: http://www.amazon.com/gp/aw/d/B00D42AFS8/ref=mp_s_a_1_2?qid=1417692651&sr=8-2&pi=AC_SX200_QL40
That thing is awesome, only thing I would like to know is do the jimper cable leads unplug from the unit or are they permanently attached? either way its a neat little unit
I would find a small marine fuse box and mount it to your sled. Add a deep cycle battery and you have plenty of power to run led lights and anything else you want.
Powerall looks way easier plus provides more power and it's lighter. Power boxes used to make sense but buy the time you buy everything and do it yourself what are you saving? I don't see the point of wasting the time in building one imo. Even Berkey came out with a $45 ready to go power box. If electrical work is a hobby and it's enjoyable to build your own great. I personally don't have the patience for electrical.