Copa,
Please be very, very careful with these inverters. They draw a LOT of power for the "small contact area" they connect through. On boats corrosion sets in and I have seen a number of them nearly start boat fires...
A 150W plug in inverter can draw 13.0A at 11.5V. This is a typical "loaded" voltage for a bank getting close to 50% SOC. These inverters can also draw considerably more than 150W for short durations. Most
marine 12V sockets are only rated for 10A and even that I don't consider safe as a continuous load. As a marine electrician I don't like to see 12V sockets loaded beyond about 6A..... This equates to approx a 65W plug in inverter.... Blue Sea makes 15A rated 12V sockets but I have measured these at
hot as heck levels (well over 120F) pushing just 8-9A....
Do yourself a favor return it and buy a 12V Laptop Adapter for your laptop. Lind, iGo, Targus and many others make them. Lind is top quality, have less waste heat, but you pay for it. You can find 12V laptop adapters on Amazon for $30.00 - $100.00. They are usually laptop specific so search by your computer model. If you have a Mac Jeff at Marine Beam has 12V adapters for Mac's with the mag safe connectors...
Keeping it DC is MUCH more efficient. You will find you can save 25-40% over using an inverter and computers are ENERGY HOGS... I have some customers who's computers use as much as DC refrigeration in a day......
When I boarded this boat the smell of burning electrical and melting plastic was awful. It led me to this melted 150W inverter charging a 17" laptop computer.......
The 12V outlet also had 16GA wire and NO FUSE.......
I see melted inverters like this more regularly than you care to know about....