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IME a battery operated device did not have the hours needed to run something without a charging system either a battery charger like I used, or a solar panel charger I heard other people use.
I ran a recirculating sluice using an older battery charger hooked to a car battery for hours. I doubt I'd get 90 minutes of straight use off my 1100 GPM pump on the gold cube. This royal pump is twice as strong and the battery rotates the sluice.
The only thing I found that would keep me running a long time was gas. A leaf blower operated dry washer with an extra liter or two of gas lasted as long as I needed.
I also operated a 120 VAC trommel off a 5500 watt generator. A single fill up would be much more than a days worth of work. That was not that portable, but could be hiked in by a couple of people. This is similar to what you see on the GPAA website for battle of the trommels. The trommel separated from stand, and those could be hiked in separate from the stand and separately from the generator. I really think this is the amount of material you are trying to move.
I never found the battery operated equipment to move a lot of material.
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