It might be 100w, though I think I recall a post about the wires to it don’t look 100w. You would also be going from DC the AC back to DC not that that really matters though. The biggest issue is that the Starlink plug won’t fit but the outlet cover you need a short extension cord or something to plug it in.
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I’ve been running mine from my EcoFlow battery with the battery charged from the second row seat cigarette lighter plug. I could of course just run the starlink directly from that plug, but I like the little battery cuz it charges up while I drive when I stop I still have Wi-Fi without doing anything cause it runs off the battery.