Dodge 2010 Grand Caravan - Owner Manual - Manual (Page 199)

To avoid overloading the circuit, check the power ratings
on electrical devices prior to using the inverter.
The power inverter switch is located near the center of
the instrument panel below the two 12 Volt power
outlets.
To turn on the power outlet, press the switch once. Press
the switch a second time to turn the power outlet off.
Power Inverter Outlet Power Inverter Switch
198 UNDERSTANDING THE FEATURES OF YOUR VEHICLE