I tried a couple available power supplies with poor results. One tested unit would produce noise when using audio equipment.
Another would not run my netbook.
All tested unit where bulky and heavier then I wanted. I was unable to find one to meet all my needs so I designed my own power box coupled with a inverter and solar panel.Features
12 volt 18AH deep cycle battery
Battery voltage meter
2 - 15amp rated power outlets
Outlets fused with auto reset breakers
25' extension cable
Clips to charge vehicle battery via solar panel
12 volt outlet from solar panel
Multiple 12volt plugs for accessories
Twin USB port for charging various types of electronics
Mini USB port cable
Charge off Land Cruiser 12volt power outlet
Charge with 110volt power outlet
Charge controller inside with auto shut off when fully charged
Charge with solar panel - can not overcharge
27watt Brunton tri-fold solar panel
Xantrex 110volt 400watt inverter - works on everything so far
Inverter displays input voltage, output voltage, watt comsumed
Power box size 11.5"x7"x4.5"
Total weight of all items 8.5lbs.
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