Mounting continuous solar into Jackery 1500?

[BootLeg JK]

I have a Jackery 1500 in the back of my truck and have a fridge plugged into that. Can I get away with having a full time 100W solar panel pumping into that? Meaning is there anything wrong with having contact power going into it? I'm assuming it's OK and once full, it just doesn't accept till it needs more. Right?