KEBO Full Range Voltage Stabilizers

Camping crowded on holidays or that precarious electricity at the most rustic support points can mean low voltage and insufficient electricity to touch your devices. Especially refrigerators and air conditioners, many other equipment can also burn with such a fluctuation of energy or simply not turn on. 

To solve this problem definitively, we received the two models of KEBO STABILIZER from KIOOPS. Automatic, powerful, without selector keys and best of all: It touches all types of devices including motors and refrigeration compressors. Let’s test?


Every day more campsites have sockets to connect devices and lighting in the tents and also to plug in recreational vehicles. Trailers and motor homes natively already have an electrical system that touches lights, a refrigerator, TVs, appliances and battery chargers. It turns out that the electrical installations of many campsites tend to be undersized, with fine, long wiring and with many plugs at the end. On major holidays many equipment ends up being connected at the same time. This is added to the consumption also greater than the usual of the facilities of the establishment that include the electric showers of the bathrooms. Not to mention the local electricity network that also suffers from the high consumption of the tourist destination in places that are generally more distant, as is the majority of campsites. The result of all of this is a huge power surge where the voltage plummets in hourly data. Mainly due to the unbridled use of pure resistance appliances, such as sandwich makers, heaters, plates and hair dryers, in addition to electric showers and lights being turned on.

WEAK AND WEAK ENERGY: Every time someone turns on a device there is a drop in the voltage of that network. Especially if it is at the same branch of your outlet, the energy will increase and decrease constantly. The “bath time” is the worst of them. In addition to the electric showers at full steam, there are hair dryers and appliances working at dinner just as the lights of the entire camping and city are switched on. This “coming and going” in the voltage can cause major damage to the equipment.


EFFECTS ON LAMPS: Nowadays even LED lamps are not limited to emitting a weak light like the old incandescent ones. They start to blink madly, causing enormous discomfort in the environment. Not to say that burning after a few minutes can be inevitable.


Tents have increasingly used mini-fridges, just as small trailers have them natively. Larger trailers and motor homes already have large and even “duplex” refrigerators, with some having separate freezers. This type of appliance suffers too much from the problem of energy fluctuation, in addition to being a device that also causes this fluctuation in the network. They work with a compressor motor that uses a very high load at the time of “start”. When they work, they lower the mains voltage and sometimes need to abort this mission due to a lack of sufficient energy. As refrigerators turn the engine on and off several times a day, they end up suffering from this variation in addition to causing it.


Trailers and motor homes are often equipped with air conditioners of various types. As it is a vehicle, it suffers more from the action of the sun and the heat, being often much more uncomfortable than the fresh tents in the intense heat. Then the air conditioning ends up being paramount. However, this is the equipment that suffers the most from insufficient electricity. In addition to being equipment that “pulls” a lot of energy, the compressor “starting peak” requires even more power. The result of this is a large fluctuation of the trailer’s energy while the air is running. In the vast majority of times when energy is low, the air doesn’t even turn on.

USE OF TRANSFORMERS: Even with options for 110V devices in campsites served by 220V sockets, conventional transformers do not solve the problem. This is because they only “break in half” the voltage of the outlet. If the input is 220V, the output is 110V, but if the camping outlet is 180V (which is not uncommon on certain dates and occasions), the transformer will deliver only 90V, which will not touch some equipment. In any case, it is always recommended to have one of these in the trash.

COMMON STABILIZERS: Devices common in the use of computers and printers, are not very usable in camping. They have low rated power, very limited regulation ranges and are not designed for equipment with a motor or compressor. For lighting it can have some effect, but hardly when the voltage is too low. There are some more enhanced models with larger regulation ranges and that are prepared for greater powers, however their electronic controllers are incompatible with air conditioning devices, being very “crazy” at the time of starting leading to the burning of relays.


In Brazil, the vast majority of campsites offer 220V power outlets. In the states of São Paulo, Rio de Janeiro and Minas Gerais, it is very common to have campgrounds with 110V outlets, which may exist throughout the rest of the country in isolated cases. Stabilizers can be of the “bivolt” type when they have inputs that vary both in the range of 220V and 110V, regardless of the output. There is usually a selector switch that must be adjusted prior to connection, leading the camper to have to make sure the voltage of the location and risk burning the device if it is connected incorrectly. The “full range” or “autovolt” equipment, on the other hand, has electronic controllers that automatically read the voltage of the socket and adjust themselves to derive their specific output.


All transformation equipment works nominally in Watts (w), but must always be applied in (VA) according to the type of equipment to be connected. This applies to transformers, stabilizers, chargers, converters and also inverters. Devices with resistive loads (heaters, dryers, toasters, sandwich makers, electric pans and the like) can be applied by nominal power, that is, the same total 5,000 or 10,000 W of the stabilizer in this review. If inductive or capacitive loads are applied, such as electronic equipment or using motors for example, the coefficient 0.8 must be applied. So to turn on the refrigerator and the air conditioning, we must consider that the maximum consumption of this stabilizer will be [(0.8 x 5,000W) = 4,000W in the case of 5kVA] and [(0.8 x 10,000W) = 8.

THE KEBO VOLTAGE STABILIZER: After all this theory, we come to the focus of this review. In two different configurations, one in the high 5,000VA (5kVA) of power and the other in the exaggerated 10,000VA (10kVA), the stabilizers have all the best characteristics of those mentioned above, added to more details that will be listed here. In short, it has a special transformer (more economical), with FULL RANGE input range (from 100V to 260V), High power, 220V stabilized output and still allows the connection of ANY EQUIPMENT as long as its power is compatible. Including air conditioning engines and compressors and refrigerators. Below some particularities that attracted us a lot in the acquisition of this product:


Internally, all regulation ranges (from 100V to 260V) are served by an internal transformer with multiple bearings. However, traditional transformers (square-shaped) form a lot of magnetic field and also heat up a lot, resulting in a LOSS of energy in magnetism and heat. The KEBO stabilizer uses the so-called TOROIDAL transformer, of round shape (ring), which contemplates several advantages: Less magnetic field irradiation; very little consumption when no load; Lower loss rate; Less voltage variation at the output; Smaller size; Silent.

INITIALIZATION DELAY SYSTEM (DELAY): As everyone knows, when there is no light even for a few minutes, it is always prudent to turn off the main switch (circuit breaker) to avoid the “return spikes”. When the light comes back, it comes on strong and with a high discharge that can (and often does) burn appliances. Both models of the KEBO stabilizer have a delay system. As soon as the electric light comes back (or is turned on for the first time) it waits a predetermined time until it releases its input (connection). This time can be chosen by the key on the panel. The smallest, of 6 seconds, is enough for the light to return and stabilize (and burn all the equipment of others that are not protected). The longest is 180 seconds, making the device wait 3 minutes for this reconnection.

(Countdown on the display)


One of the biggest problems in this type of equipment is due to the sockets, plugs and wiring of input and output that end up being very dimensioned in the limit. In the case of KEBO there is no such problem. There is a dock of connectors of the same pattern as circuit breakers that receive very thick wires and cables with great security. We will detail this step in the installation.


The stabilizer “on / off” switch is already a circuit breaker. DIN standard, it has all the lightness of the lever, reliability of the contact and the protection of trip, eliminating the need to change fuses, so woefully common in common stabilizers.


A simple digital panel brings in large numbers the voltmeters that measure the input voltage (in red) and the output voltage (in green). Three more LEDs indicate the operating status of the device, the first indicating “normal operation”, the second indicating “delay time” and the last indicating “protection” mode, in which the output is blocked in case of overload, short-circuit, undervoltage or overvoltage of the input or overheating of the transformer.


The stabilizers arrived by carrier, each in its well illustrated box. The weight is great. They come well accommodated and fitted in styrofoam molds and wrapped in a transparent plastic. Right away we were able to check out Kiopps’ import exclusivity, as the product comes all screen printed with information in Portuguese. It also comes with an instruction manual and a kit of very strong screws and metal anchors to fix the stabilizer on the wall. Even a detailed template on quality paper accompanies the product to assist with installation.


After loosening the two screws that open the connection cover, it already comes out with the connector bus attached. They are screws in the same connection pattern as the circuit breakers that have an “overwhelming plate”. This is important so that the screw does not crush the wires of the cable to be fixed. With a philips wrench it is easily moved and a screwdriver gives that final grip.


With the two models that KIOOPS / KEBO sent us, we installed them in two locations. The large model (10kVA) was installed in the home engine. The smaller model (5kVA) with power to spare for this application was installed in our trailer. In both cases we intend to say goodbye to the problems of oscillation or weak energy, especially in campsites during Carnival or New Year.


Our motor home has an original converter that automatically distributes the various sockets both 110V and 220V internally as well as other equipment that vary in voltage. For this reason, we decided to continue with his presence, even though we no longer use his battery charger (replaced by floating and smart ones) or the manual voltage selector. In this way, we also apply KEBO to the vehicle’s energy INPUT, where the input will always be regulated at 220V so that the electrical system can work. In the case of those who have all the equipment and internal outlets at 220V, then they can “discard” all other transformation equipment, leaving only with KEBO.

USE:We tested in several situations even provoked in front of our old manual selection converter to derive higher and lower voltages before entering KEBO. In all of them we were successful in obtaining 220V at the output, except when we dropped 100V. Sometimes, starting the air conditioner can cause this entry to fall if the light is at this minimum limit and that is why we prepare ourselves with a conventional TRAFO to switch on before KEBO in extreme cases of 110V campsites that are going to be crowded. The Delay effect works perfectly even indicating the countdown of the chosen time on the display. We chose 6 seconds for the obvious reasons of testing, but in the common camps we will use the 180s option to ensure greater safety or to avoid the “come and go” when the light goes out in less than 3 minutes. The stabilizing effects can be noticed when the device changes stages. It is clear that the stages are activated more slowly and this is exactly the reason that allows the connection of compressors and other heavy equipment. Both the stabilizer voltmeter and our external voltmeter always mark the stabilized output at around 220V, sometimes a little more, sometimes a little less.

WALL FIXING ITEMS: Although we do not use them in recreational vehicles, the KEBO Stabilizer comes with a wall fixing kit. As the device is heavy, metal plugs, screws and even a template made of cardboard are placed inside the box so that it can be fixed to the wall safely. The metal bushings expand when the screws are tightened leaving everything securely attached.