Installing a refrigerator in a car with your own hands: a complete guide

Trips long distances or outdoor activities require a special approach to food storage. Conventional thermal bags can keep the cold for only a few hours, while a full-fledged one car refrigerator ensures the safety of provisions for several days. Installing such equipment in a vehicle is a technically simple task, but it requires attention to the details of electrical wiring and safety.

Before starting installation work, you need to clearly determine the type of device you plan to use. Compressor models require stable voltage, absorption models can be powered by gas, and thermoelectric models are the easiest to install, but less efficient. The correct choice of location and mounting method directly affects the durability of the device and the safety of passengers.

In this article we will analyze in detail all the stages: from the selection of tools to the final check of the system. You will learn how to lay the cable correctly, why you cannot connect powerful consumers to the cigarette lighter directly, and what precautions are required when working with the vehicle's on-board network.

Choosing a suitable location for installation

The first and most important step is to determine the location where your refrigerator will be based. Most often, owners choose the luggage compartment or the space behind the rear row of seats. It is important that the device stands on a horizontal surface, especially when it comes to compressor models that are sensitive to tilting.

When choosing a location, ventilation must be taken into account. The heat exchanger must be freely blown with air, so do not press the back wall of the device tightly against the interior trim or other obstacles. The minimum gap is 5-7 centimeters on all sides, which will ensure efficient operation of the capacitor.

It is also worth thinking about the reliability of the fixation. In the event of sudden braking or an accident, an unsecured heavy box can turn into a dangerous projectile. Use standard belts, special slides, or secure the device to the floor through the eyes.

• 🚗 The trunk of a station wagon or hatchback is the most popular option to save space in the cabin.
• 🚙 The floor between the front seats is suitable for compact models, but may interfere with gear shifting.
• 🚐 A separate box in a camper is an ideal solution for SUVs, protecting against dust and impacts.

Necessary tools and materials

High-quality installation is impossible without proper preparation. You will need not only the refrigerator itself, but also a number of additional components that will ensure reliable connection and protection of the electrical circuit. It is absolutely impossible to save on wires or fuses here, since this is a matter of fire safety.

To work, you will need a set of tools, which any car enthusiast usually has. Pay special attention to the quality of insulation of connections - under conditions of vibration and temperature changes, ordinary twists quickly oxidize and begin to heat up.

Separate the choice deserves attention cable. Standard wires that come with some budget models often have insufficient cross-section. For distances of more than 2 meters from the battery, it is recommended to use a copper wire with a cross-section of at least 4 mm² to minimize the voltage drop.

Connection diagrams to the on-board network

There are two main ways to power the refrigerator: through the cigarette lighter socket or directly to the battery. The first option is suitable only for low-power thermoelectric models with a consumption of up to 5-7 Amperes. More powerful compressor units require direct connection.

With direct connection, the cable is laid from the positive terminal of the battery through the passenger compartment or under the bottom to the installation site. Be sure to install it in the gap of the positive wire fuse as close as possible to the power source (no further than 30 cm from the battery terminal). This will protect the wiring in the event of a short circuit.

⚠️ Attention: Never use wires with an aluminum core for connections in a car. Aluminum breaks due to vibration and has high resistance, which can lead to insulation melting and fire. Use only copper (marking KG or PVS).

To protect the battery from complete discharge, it is recommended to install a special controller or use a relay that will turn off the refrigerator when the voltage drops below 11.8 Volt. This will allow you to start the engine even after a long period of parking.

Protection against battery discharge

One of the main problems of car travelers is a discharged starter battery. A refrigerator operating in the autonomymode can quietly “drain” the battery to the point where the engine will no longer start. Modern models often have built-in protection, but you can’t rely on it alone. costs.

The most reliable solution is to install an external threshold relay, for example, a popular device like CT-200A or its analogues. It automatically turns off the load when the voltage drops and resumes operation when charging from the generator. The shutdown threshold is usually adjusted using jumpers or a potentiometer on. case.

Sequence of actions:
1. Disconnect the battery (-).
2. Install the fuse at the (+) terminal.
3. Lay the cable in the corrugation to the installation location.
4. Install the second fuse in front of the refrigerator.
5. Connect the terminals to the device.
6. Check operation and turn on the battery. data-i="127">In the cabin, wiring should be hidden under the floor covering or behind plastic panels. Do not leave the wires dangling - they can get into the seat adjustment mechanisms or pedals, which will lead to an accident. Use plastic clamps to secure them.