Generators For Sale in South Africa
Gasoline generators – mobile power plants, generating an average of up to 5-10 kW. Convenient as a backup source of energy. They are purchased for use outside the city, at a retail outlet, in the country, in a garage or workshop. Browse our range of Ryobi petrol generators for sale!
Petrol Generators For Sale
RYOBI RG-10KVA 4-Stroke Generator, 10kWR55,200.00
RYOBI RG-3500 4-Stroke Generator With Key Start, 3000WR6,875.00
RYOBI RG-6900K 4-Stroke Generator With Key Start, 5500WR11,995.00
RYOBI RG-7000K 4-Stroke Generator With Key Start, 6500WR13,225.00
RYOBI RG-7900K 4-Stroke Generator With Key Start, 7500WR12,262.00
Inverter Generators For Sale
Inverter generators, the engine is linked with an alternator, which generates AC electrical power, similar to a standard generator. However a rectifier is utilized to transform the AC energy to DC with capacitors that are utilized to filter out inconsistant power to some extent. The DC electrical power will then be “inverted” back to clean AC electrical power in the preferred voltage and frequency. The machine generates steady and dependable power separate of the engine pace. The outcome is much “cleaner” electrical power than is achievable with a traditional generator, basically the exact same quality of power that you usually receive from Eskom.
UNITED POWER iG2400S Sinewave Inverter Generator, 2kWR11,950.00
UNITED POWER iG3600S Sinewave Inverter Generator, 3kWR15,125.00
RYOBI 1000W Open Frame Inverter Generator RG-1250iR4,459.00
RYOBI RG-1280i Open Frame Inverter Generator, 1200WR5,175.00
RYOBI RG-2100i Suitcase Inverter Generator, 2100WR11,500.00
RYOBI RG-2600i Open Frame Inverter Generator, 2600WR7,763.00
RYOBI RG-3200i Suitcase Inverter Generator, 3000WR18,400.00
The advantages of petrol generators include:
- Mobility – due to their light weight and compactness, they are easy to load in the trunk.
- Ease of use – any homeowner can learn how to use this equipment, special training is not needed.
- Small investments – prices for gas generators are relatively low. However, with constant use, you need to be prepared for a large consumption of gasoline.
When choosing a gasoline generator for giving, the following parameters will be crucial:
- Output power – selected based on the planned loads. The energy demand is calculated with a margin of 20-25% so that the generator does not work at the limit. To power lamps, household appliances and medium power tools, a power station with a capacity of up to 3-5 kW is enough.
- Fuel consumption – with equal power, choose a model with lower gas mileage.
- Fuel tank volume – affects the duration of continuous operation.
- Startup type (manual, electric, combined) – the electric start is simpler and more convenient, but the manual is practically trouble-free.
One of the advantages of petrol generators is affordable prices. The average cost of low-power models is 5 – 6 thousand Rands. Diesel generators require large initial investments.
Petrol Generator Buyers Guide
Before choosing and purchasing a generator, it is recommended to clearly evaluate the planned load on the device – this will be all devices that use electric current. Their rated power and phase connection are important. These are two main factors that will affect the initial selection of the petrol generator you need. Information about the rated power can be found in the technical manual of the appliance or on its body plate.
The choice of a petrol generator depends on several factors. First of all, this is of course determining the type of its engine, directly the generator and phase, and then the subsequent selection of the model for certain characteristics and indicators.
Types of petrol generators
In all models of gasoline generators, an internal combustion engine is installed. By its principle of operation, it can be two- or four-stroke.
The two-stroke motor is easier to use and is used on less powerful devices. A huge plus in its use is the ability to easily start at low temperatures. In addition, it is economical in fuel consumption and extremely unpretentious in operation. The four-stroke engine is used on units designed for long-term operation (5-10 hours) or round-the-clock operation. It is quite difficult, and often simply impossible, to get in the cold, but it is more powerful and does not require the preparation of special oil-gas mixtures for its work.
In addition to the stroke, the engines may differ in the number of cylinders, the material of manufacture of the cylinder block and the placement of the valves . The least stable and have less resource models with an aluminum cylinder block and valves located on the side. They are the cheapest and have a small stock of working time. Such units are widely used in the form of portable mini-power plants for work during periodic trips to the countryside, for fishermen, hunters and tourists, that is, wherever a combination of lightness, mobility, compactness and low power is required.
More heavyweight, expensive and powerful, with a large motor resource will be cast-iron engines with a lateral arrangement of valves. Such models are used in the organization of energy supply systems for small country houses and buildings, when there are a small number of power consumption points. They are ideal for seasonal use, throughout the summer season or for use during periodic, short-term (no more than 4-6 hours) interruptions in the power supply network. They are also widely used in equipping exploration lots, road-building sections and resource-mining shifts operating in the field in the absence of a centralized electrical supply.
The most productive, powerful and expensive units are equipped with a four-stroke engine with a cast iron cylinder block and an upper valve arrangement. They are distinguished by high motor resources (up to 3000 hours or more), which makes them worthy competitors of diesel stations. Such models are established, if necessary, to organize the energy supply of large country houses and cottages both for seasonal use and for year-round use.
Identify differences between generators
The generators themselves in gasoline power plants can be of two types, this must be known before choosing a gas generator:
- asynchronous (more resistant to the effects of high humidity and pollution, cheaper in cost and most suitable for working with devices that have an active load, that is, characterized by constant current indicators at startup.)
- synchronous (it can withstand multiple starting overloads, but differs in a more complex device and high cost. It is indispensable for working with inductive appliances – welding, compressors and pumps.
It should also be noted that there are both brush and brushless types of generators. The latter are undemanding in operation and require lower maintenance costs.
Determined with phase
The next step will be to select a generator depending on the phase. The generator may be single or three phase.
The choice will depend on the type of power source in the house. If only electric tools, refrigerators, televisions and irons are available, then the acquisition of a single-phase apparatus is logical.
In the event that you have to work with multi-burner furnaces, welding or pumps, then the three-phase model should be the object of choice. If there are both consumers, you need to buy a generator with three phases, or two petrol generators with different phases.
If single-phase power appliances are connected to a three-phase generator, it is recommended to remember and make sure that the total load on each of the phases does not exceed the generator power, otherwise its overheating and breakage are inevitable.
Another advance in choosing the right generator will be the evaluation of the parameters and technical characteristics of the presented models and the selection of the name of the one that fits the right conditions.
Power as the main parameter
What do we value? First of all, this, of course, is the power of the generator. It should be enough to provide the right amount of electricity.
Before making a final decision on the purchase of a generator, by a simple calculation, determine the level of energy consumption at the place of planned use. As a rule, all installations differentiate in power:
- 0.35 to 1.5 kW – enough for portable mobile use,
- 2-6 kW – enough when providing electricity to a small country house,
- up to 15 kW – such gas generators will come in handy if you plan to use them for a medium-sized house, often in a seasonal rhythm,
- from 20 kW – the choice of generators with similar power for cottages and country houses with all the benefits of civilization is logical.
When comparing models by this parameter, pay attention to the fact that it was carried out by the value of the rated power, and not by its maximum output indicator, since work within the latter is possible only for several minutes, or even seconds. Nominal values are usually indicated on the nameplate or in the technical instructions of the gas generator.
This characteristic determines the possible operating time of a petrol generator without refueling. Its indicators directly depend on the size of the gas tank and the intensity of the load on the generator. The more electrical appliances connected, the higher the fuel consumption, which means that the time until the next refueling is reduced.
As a rule, models with powerful engines are equipped with a fuel tank of 20 liters or more, which gives them up to 10-15 hours of continuous operation. This will be the best option with constant year-round stationary use. And in gasoline mini-power plants this indicator can be 1-3 hours, which is quite enough during emergency blackouts or in field use.
Taking this characteristic into account is usually critical for mobile mini power plants, as one of their main advantages is ease of transportation. A model of 70-80 kg will bring little joy to those who often have to carry it from place to place.
That is why special attention should be paid to this indicator if you choose a machine for trips out of town or for use in hiking trips. But in the case of the purchase of a gasoline generator for permanent stationary use, a lot of weight is an integral part of impressive performance, for which, in fact, these models are chosen.
We pay attention to the optional capabilities of petrol generators
Next, we will consider some technical features of gasoline generators that affect the operation of these units, and, consequently, the choice of goods.
This device can be mechanical (manual) or electric.
Manual starters are the most common due to the simplicity of their device, reliability and simplicity. In turn, the presence of an electric starter can significantly simplify the work with the unit, make it comfortable, and if necessary – fully automated.
For example, when disconnecting mains electricity, the generator, as a backup source of energy, will be launched independently, without human intervention, as well as turning it off when resuming the main power supply.
Electric starter, among other things, makes it possible to use a remote control.
This abbreviation is used to denote an automatic voltage regulation system. It allows you to maintain the generated power at a constant level, regardless of voltage fluctuations in view of connecting or disconnecting power consumers. The presence of such a device in a particular model is an indicator of its kind of “class.”
As a rule, all petrol generators have generator cooling devices to protect against overheating. In models with high rated power, it can be water, but most often an air type is sufficient for adequate cooling.
When choosing such a unit, it is necessary to determine in advance the place of its installation, since it must meet certain requirements for the volume of circulating air and the temperature regime. In this regard, air-cooled models are more demanding and sensitive to environmental conditions.
Features of the use of Petrol generators
The use of petrol generator has its own characteristics. When installing such devices and subsequent work with them, it is necessary to comply with some rules that will ensure their long-term and safe use. All the subtleties and tricks in the application of these units are primarily associated with the presence in their device of two main parts: an internal combustion engine and directly an electric energy generator.
Placement of generators is carried out indoors or outdoors. When the unit is located on the street, it is important to protect it from precipitation, excessive dust and dirt. As a rule, they are located under canopies, in sheds or other outbuildings. This is due to the high noise level associated with the operation of the gas generator, despite the presence of all kinds of sound-absorbing casings and silencers. A number of factors also affect the location, for example, such as high fire hazard and the presence of exhaust gases. If, nevertheless, installation is carried out inside the house, then placement in basements, in workshops or garages is recommended.
Install the unit on a flat specially prepared surface in order to avoid its increased vibrational vibrations during operation.
The room itself must meet several requirements. It does not allow a high level of humidity, since work is carried out with electricity and there is a possibility of a short circuit. The place should be dry, preferably without direct sunlight.
Maintaining a cool air temperature in it is recommended. This is necessary for adequate cooling of models with air ventilation. The gas generator itself during its operation is a source of heat, and coupled with a high ambient temperature, this can lead to overheating of the device and its failure.
Equally important is the availability of quality ventilation directly to the room itself. This is primarily due to the fact that in the course of its operation, the gas generator emits a certain amount of gaseous products of fuel combustion into the atmosphere. Often, air is exchanged through venting transoms and internal exhaust ventilation. But the most acceptable option is the removal of the resulting exhaust gases through a pipe (not more than 3 meters long) outside the building, thereby eliminating their ingress into the indoor air. The high concentration of these toxic gases is extremely dangerous for human health, therefore it is necessary to seriously address this issue. Therefore, the most advantageous option in this regard is to place a gas generator in any building in the yard or under a canopy.
It is still very important to consider the presence of fire sources nearby when placing gas-generating equipment. It is necessary to completely exclude this due to the fact that the raw material for refueling the gas generator is highly flammable and there is a high risk of fire during careless handling. It is not necessarily gasoline itself that leads to a fire; its vapor may be quite enough. That is why it is strictly forbidden to smoke and work with an open flame near these units.
If you have purchased a heavyweight powerful model that you plan to use in stationary mode, it makes sense to install it on a specially welded frame about 1 meter high. This will give increased stability to the entire structure and ease of maintenance. There will be no need to raise the fuel tanks high for refueling the tank or to work in an inclined position during the repair and routine inspection of the power plant. The support frame must be earthed, because it is forbidden to expose the zero phase of the generator itself to this process.
Before starting the generator, it is necessary to check its grounding. Make sure there is fuel in the tank, and if necessary, top up it. Doing this with the engine turned on is strictly prohibited.
If your unit has been interrupted for more than 1 month, then the fuel in the tank must be replaced before resuming operation. This should be done regularly if there is an infrequent emergency automatic start of the gas generator.
Also, before each start, check the engine oil level. Timely detection of its decline is the key to preventing rapid wear and premature failure of the engine block. Change the oil every 50-70 hours of operation, depending on its type. Do not mix synthetic and mineral varieties, otherwise this will adversely affect the internal condition of the engine parts.
Before starting work, make sure that no electrical consumers are connected to the generator.
After the first start, using a mechanical or electric starter, after a few seconds turn off the engine, and only then restart it. Let the engine warm up, and only then can the load on the generator itself be gradually increased. Make sure that the current consumption does not exceed the generated power, which can lead to damage to the gasoline power plant.
- When working with a gas generator, all time periods set for the operation of a particular engine assembly and the validity of consumables should be clearly controlled.
- Overhaul in strict accordance with the permissible engine life of the model. Before each launch, make sure the level and quality of gasoline and oil. If the need for oil replenishment is identified, then topping up is carried out only if the engine is turned off and has already cooled down. Opening the cap from the oil filler neck while the engine is running can result in serious injury or burns.
- Use only those brands of fuel and lubricants that are recommended in the technical documentation for your unit. In it, you can find the frequency of replacement of all consumables.
- Also, periodically it will be necessary to replace the air and oil filters, clean or install new spark plugs.
- Some models of generators can provide current and industrial and domestic voltage. It is recommended to use it directly for the corresponding devices and not try to adapt the device operating from 220 volts to 380 volts and vice versa.
- In a number of gas generators, there are 12 volt terminals that allow charging of battery cells. But some users find it possible to use them as a power source for starting car engines. To do this is categorically not recommended due to the fact that at the time the motor starts to work, high differences in current characteristics occur, which lead to failure of the generator unit.
- If you plan to connect electronic computing and other types of complex household appliances, it is advisable to use voltage regulators, since the current generated by the generator does not always have stable characteristics.
All questions that arose during the reading of this text, you can ask our managers and get additional comprehensive information.