This page will help you achieve 120 Volts AC with a DC solar system. These inverters will work on solar systems big and small. Most of the inverters here are compatible with 12V DC however 24V DC inverters are available. A lot of solar systems operate off 24 volts however it is not uncommon to see 12V systems.
The inverters on this page are marketed for "solar" applications which may mean charge controller and inverter all built into one. The all in one approach may or may not be over kill for your situation. Traditional inverters would also work with solar, but may be less reliable.