Alternator/Power Inverter ???'s

[choctaw]

I have a power inverter I need to install. I need to know if I need to change my alternator? If so, which one do I need?

Here is the inverter...PV3000GFCI - PowerVerter Plus Inverter w/ GFCI Outlets - Industrial-Strength Power for Heavy-Duty Applications

Frequency compatibility 60 Hz
Output watts 3000
Continuous output capacity (watts) 3000
Peak output capacity (watts) 6000
Output nominal voltage 120V
Output voltage regulation Maintains PWM sine wave output voltage of 115 VAC (+/- 8 VAC)
Output frequency regulation 60 Hz (+/- 3 Hz)
Overload protection Automatic overload protection shuts down inverter system in the event of overloads. Output is protected by 2 built-in 20A circuit breakers (each controlling power to 2 outlets). Inverter and electrical system are further protected via set of 6 40A automotive input fuses.
Outlet quantity / type 4 AC outlets (GFCI protected)

[choctaw]

[JSchuricht]

Depends on how you intend to use it. If you're just powering a laptop or the occasional drill/saw then you're fine with the stock one. If you intend to run at or near capacity for a long period of time, then you need to upgrade several things. If you're intent is to install a large battery bank to run the inverter with the truck off, then you would probably want a separate alternator.