It has a voltage sensor that turns off the AC off when the batteries reach the set voltage (usually set at 11.5v).

The voltage sensor measures the batteries' voltage while the AC is running. Before starting using the AC, you need to set up the voltage sensor at how many voltages of your batteries you want the AC to stop working so that you can guarantee the engine start.

They get charged while the engine of the vehicle is running.

No, it charges when the engine of the vehicle is running.

Around 3 hours.

The split unit is installed on the side or rear part of the truck.

We have another AC model, called the integrated model, that is used when you want to install it on a flat roof.

Yes, you can use it with the engine on, even as your primary AC if the original AC from the vehicle breaks down, or with the engine off.

The installer needs to have notions about AC installation and have some special tools, like the vacuum pump and the manifold. But we provide the installation video and guide in case you want to install it yourself or an installer of your trust.

The differences of our unit with the one in Amazon are the following. Our unit has the following:

- It has an algorithm that discharges one battery at at time which enable the AC to last more than 8 hours with the engine off.

- It has a voltage sensor that cuts the AC unit when the voltage of the batteries reaches 12.5v so it ensures you can start the truck engine again.

- We provide a post-sales service so you can contact us in case anything happens.

- It has 1 year warranty where we replace the unit with a new one if anything doesn’t work.

- We provide financing.

- We have an official installer network around the US where you can go while travelling to solve any issues the AC unit may have.