Editorial Product Review:Item Description:320-watt continuous AC output (600-watt surge) * two 3-prong AC outlets * 250 p.s.i. air compressor (with air hose) * 3-digit digital display (displays battery status and wattage draw) * built-in flashlight (incandescent light will run for 30 hours without a charge) * built-in sealed battery and jumper cables * overload protection shuts off Powerpack 400 Plus if you connect an appliance that draws too much power * 250-amp fuse protects unit from damage * 16-1/8'W x 9-5/8'H x 8'D * 6-month warranty
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Buyer Reviews
Average Buyer Rating:
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A great product for my uses
This has paid for itself. I have used it now for 2 years to run fans and my credit card machine at outdoor art fairs where there is no power. At home I have used it for other things, to jump the car battery, pump up bike tires, top off car tires, and even to power the sump pump during a torrential rain storm accompanied by power failure. That alone saved my carpeting, as the rainfall was so great my installed battery back-up for the sump pump could not handle it. It does exactly what I bought it for, and more. It is ridiculously easy to use. There was a problem with a broken jack when I got the unit, but Amazon replaced it promptly.
Customer Rating: -
Saved the Day
This thing saved me! I was 400 miles from home when my battery died. Luckily I had the portable back-up power source to easily jump start my car. What a relief. Absolutely fabulous for running a blender while camping but couldn't handle the electric coffee maker (probably due to the heat element). I would definitely recommend this product.
Customer Rating: -
Better than Described!
I was so pleased with my first unit that I purchased two more. I own five 13Watt solar panels and each Powerpack 400 can be fully charged with a single 13Watt solar panel. I only had to solder Radio Shack plugs to some braided hookup wire. This is covered in the instruction manual and is really easy to do.
The Powerpack batteries are cheap and easily user replaceable. Additionally, I can hookup larger amperage batteries (using the supplied jumper cables) to the Powerpacks - thus increasing running time on each unit.
Since my Radio Shack battery charger (for 9Volt, AAA, AA, and D size NMh batteries) functions with a 12Watt DC current, I can use the Powerpack to charge these little batteries when the grid power is down.
Customer Rating: 
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LED display stopped working altogether
I bought this 1.5 years ago and used it on occasion. Recently, I noticed that the LED display started acting finicky and would not always display. The problem quickly worsened to the point that now the LED will not display at all (no matter what) even though the unit still provides power as before, and even though it appears that the unit still can charged with the included A/C adapter.
The lack of a working LED display is very annoying because I will no longer get feedback as to how much power is left in the battery, or how many watts are being consumed when using the unit. Since the warranty only lasts 6 months, I'm out of luck.
I tried temporarily disconnecting the battery and reconnecting it to see if that would "reboot" the display but it did not help. I also tried removing the battery altogether and opening up the plastic case of the unit to see if there were any loose connections inside that would cause the display to fail but did not find any. Some of the connections are in compartments that didn't seem accessible. Looks like I'll just have to live with the lack of the LED display.
The only LED that still works is the one that lights up the power switch of the inverter.
Another complaint I have is that the clear plastic covers that protect the inverter and 12/V stockets are awkward to flip open because it is hard to get a good grip with my fingertips.
