How many Watts would I need?

Did you really sign up with a new name to ask the same question?

 

OK.
Another very recent poster asked the exact same question a couple hours ago.

The biggest and best inverter, installed by someone that really knows how to do it.
2500W would be good if you also want to run a microwave.

And make sure you have very good batteries to support the inverter, or you will be idling quite a lot.

 

Rough guess - they're all fairly low draw, so 1000 W should do it.

Quick research on the draw of devices and a calculator will see you right.

 

Yup. Microwave and coffee pot are high draw, 2000-2500 if you're regularly running these.

 

Search the electric connection forum on here, I think this has been covered pretty well.

 

1.21 Gigawatts, if you also plan on running the flux capacitor.