Is it OK to plug it in to an inverter so I can charge it with my 12 V socket in my van?

To maintain the battery level or even to charge it while driving, Is it ok to plug the cord into a 70 watt inverter that plugs into the 12 V in my camper van?
I bought it to be dual purpose as a car stereo and for when I’m camping
. I don’t know why I assumed it came with a 12 V charger, I overlooked that. I’m hopeful it will be a solution to use my inverter.
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