Hey JCAG
I wouldnt use an inverter myself, the pineapple runs off of 12v and thats what your car battery supplies, id be more inclined to use something like this https://www.amazon.co.uk/Lavolta®-Charger-Connector-Synthesizer-DVD-Player/dp/B00TRKAYJQ/ref=sr_1_13?ie=UTF8&qid=1484003765&sr=8-13&keywords=12v+2a+car+charger. Most netbooks have cigarette lighter port chargers aswell. An inverter would be harder on your car battery.