Car charger for surface pro ??

[noxidimus]

I use an inverter in my motorhome but the instructions with the Surface Pro say don't use one. My inverter is a 'modified sine wave' which is fine for everything else I plug into it, (printers, phone chargers, laptop etc) although it did b..r up a toothbrush charger, can I use it with my Pro or does your inverter provide a 'pure sine wave' which is more expensive but gives a less-variable output? I'm reluctant to plug it in just to see what happens. It should work fine but I don't want to destroy £40 (or more) worth of charger . Thanks for any answers you may have.