Also question is, how many watts does it take to run a printer?
An average ink-jet which is designed for home usewill typically use 30 to 50 watts when it isprinting, in standby mode most printers will draw around3 to 5 watts of power. Commercial printers which areused in an office will draw 30 to 50 watts on standbyand 300 to 500 watts when printing.
Furthermore, will an inverter damage my car?
However, raising the engine RPM too high cancause damage, so simply unplugging power-hungry devices fromthe inverter is often a better idea. Every situation isdifferent, but you're typically fine to power small electronicdevices like laptops, DVD players, and phone chargers withoutovertaxing the electrical system.
The power required to run an inverter isapproximately 8-10% more than the power load of theappliances being run. Inverters will draw power fromyour batteries when not in use, and the unit is turnedon.