Hi @elizabethlalone
I'm not sure that I've found the correct device as this is the only [https://gopowersolar.com/product-category/portable-power-stations/|Go Power portable power station] that I could find online. Hopefully this is the one, if not please find the model number of the power station so that the correct one can be found.
Looking at the [https://manuals.plus/dometic/duracube-500-portable-power-station-manual#axzz7y78auYU9|specifications] for the model linked above it states Wall Charging = 12-30V, 8A, 120W max.
To satisfy the 120W max rating criteria, you would need to use a [https://www.amazon.com/15V-Power-Supply-Adapter-Compatible/dp/B07FR78N3Y|15V 8A adapter] (supplier example only) as a higher voltage output adapter e.g. 20V or 30V, with the same current rating i.e. 8A, would exceed the power (W) rating specified (Ohm's law power calculation W=V x A i.e. 120 = 15 x 8)