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The runtime of the EcoFlow DELTA 2 Max depends on the power consumption of your oxygen concentrator. Stationary oxygen concentrators typically use 300 - 600 watts. The DELTA 2 Max has a 2048Wh capacity and provides 2,400W (surge 4,800W) of pure sine wave AC output. Based on this, it can run a 600W oxygen concentrator for about 3.4 hours. You can also extend the runtime by adding an extra battery, which doubles the capacity.
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