Magsafe-2 car charger for 2015 MacBook Pro?
I tried to find this kind of product a few years ago. I could not find anything relevant. Nowadays, no more luck.
An inverter may be the only solution, although it may not be the best for you.
There are also integrated battery+inverter products like GoalZero Yeti but it may be too expensive or &quot;over the top&quot; depending on your needs.