When talk about the hours that truck sleeper air conditioner will work, many drivers according to their experience give the different answers, that makes the drivers who have no experience in parking air conditioners feel confused.  So what on earth the truck cabins air conditioner can last for? Now let’s calculate.

Before we calculate the hours, we should figure out that what will effect the truck sleeper air conditioner working time?

1. Truck battery storage.

The truck or other vehicles battery storage determines the air conditioners lasting time directly. For example, 150AH vehicle battery storage and 330AH vehicle battery storage, the ac working time may difference nearly double the time.
PS: 24V*150AH=3600WH=3.6KW*H that is the formulas about vehicle battery storage. The formulas means that for a 150AH truck battery storage it can storage 3.6 kilowatt power.



2. Parking air conditioners power.

The power of parking air conditioner is not same as the cooling capacity. For the no idle air conditioning, the power is about 700W - 1200W, and the cooling capacity will be at 2000W to 2800W.
For the different brands of parking air conditioner, its power differ a lot. For example the split truck air conditioner, it will show compressor power, condenser power and evaporator power, plus the three of them will get the final ac power. Usually, the parking ac power is more larger, and its cooling capacity will be larger, then the cooling effect will be better, but the lasting time will be short.

PS: please not that the vehicles power is very important for installing the parking ac, if the vehicle power is too small and install a ac that not matched with, it may result in the ac not cooling better. But for now, King Clima have a very small power ac that the power is about 500W, cooling capacity is about 1200W, which is very suitable for the forklift trucks cooling solutions. (because of most of the forklift trucks are small power, no matched ac can for it in the market, but King Clima have the solution!). We also supply the 12v rv air conditioner solution for your camper vehicles. 

3. External environment.

In this point, it is similar with the home air conditioners. When the ambient temperature is too high, and the the parking air conditioners will use more power, so the ac lasting time will be shorter. As for the variable frequency truck sleeper air conditioner can help to save power according to the temperature difference to control the compressor and condenser fans power.

Now when you have already known the 3 reasons that will effect the ac lasting time, how to calculate it ?
Let’s take an example to explain.

CoolPro2800 sleeper air conditioner

Usually the formula is Vehicle Power(AH)*Voltage(12V/24V)*(10% Star up power)/AC rated input power=ac lasting hours.
So the hours is not an absolute number but a relative number that should take many factors into consideration.
Here s an photos that take our CoolPro2800 model as example, to get the result of 10 hours cooling time.


Photo: coolpro 2800 sleeper cab air conditioners cooling last time 

To conclusion:

Just learn how to calculate, not focus on the absolute number, usually it can work for 6 hours.