I gott a power inverter to run two laptops at the same time. It is a Black and Decker 400 watt continous unit. Is there any kind of limit to using an inverter ? I dont need anything bigger and perhaps dont need one this powerful but thought it would be better to have a little more than not enough. This will ONLY be used when it is running.

 

I have the same thing to run a laptop and printer and it works fine. If you use it when the car is off, it will sometimes whine, but other than that it is fine never had a problem.