Solar Power Kits
Rural communities where there is no access to the electricity grid, Kawaida Energy offers stand-alone power systems which are the solution for the advancement of rural development. Solar energy is key to cost effective Off-Grid power systems. Kawaida Energy has an in-depth understanding of rural electrification systems which makes us a valued partner for the provision of energy for rural electrification. Kawaida Energy product range for the electrification of rural areas and comprises products from the world’s leading manufacturers which can power schools, clinics, libraries, hospitals, social facilities –community halls, stadiums, etc.
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Pico-PV Systems
A small Pico-PV system with a power output of 1 to 10W, mainly used for lighting and can replace the unhealthy and inefficient lighting sources such as kerosene lamps and candles. Depending on the model, small applications e.g. mobile phone charger, and radio can also be added. Pico-PV systems are powered by a small solar panel and use a battery which can be integrated in the lamp itself. Pico-PV systems offer a wide range of advantages: easy installation (Plug & Play), user-friendly application, low investment costs, little maintenance required, high degree of expandability and flexible use. The prices are generally within the payment capacity of most rural communities in the region.
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Off-Grid Connect
Kawaida Energy offers Off-Grid Connect (OGC) power systems and solutions for homes, buildings and businesses that are connected to unreliable electricity grid. These solutions are also suitable for small-to-medium enterprises operating in non-electrified rural areas. These OGC systems provide safe and reliable energy. They can be well adjusted to local needs and designed with high quality energy efficient loads which makes them robust with little maintenance needs.
Examples:
Food processing e.g. grain mill, juice squeezer
Electric light for shops, restaurants, bars
Refrigeration of drinks and food, etc.
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Solar Home Systems (SHS)
Classical Solar Home Systems generally cover a power output of up to 200W peak. They are normally composed of several independent components: modules, charge controller, battery and the loads. The overall energy management is done by the charge controller as the central component of the system. Important advantages of classical SHS are the DC loads like DC energy saving lamps, radios, DC TV and special DC fridges directly usable by the system. This makes SHS very energy efficient systems without any conversion losses. For bigger SHS, the integration of AC loads is possible with the use of a DC/AC inverter, however these loads are often inefficient and oversized and thus can have a long-term impact on the storage capacity, which might be quickly damaged if let in a state of permanent deep discharge.
Consequently, it requires good design and the use of an optimized charging technology. However, trained technicians for the installation and suitable operation and maintenance will easily allow the SHS to provide reliable energy supply for years.
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Solar Residential Systems (SRS)
Larger stand-alone PV systems are called Solar Residential Systems (SRS). They usually provide electricity to large individual installations like hotels, hospitals, schools, factories etc. and offer a wide range of applicable loads. They generally include an inverter allowing the use of AC loads. The use of AC power has certain advantages, but should be primarily reserved for larger systems and/or if the loads needed can only be operated with AC power (e.g. larger working instruments and machines). With a typical range from 500W to 4000W output power, SRS usually integrate 12V and 24V battery voltage, even if bigger systems work with higher voltage (48V).
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Hybrid Systems
Many independent power systems use more than one source of energy and thus are called hybrid systems. Most of the hybrid systems use PV in combination with a wind generator and optionally a diesel generator for the back-up-function. Hybrid systems ensure a continuous and reliable electricity supply. They also provide enough power to satisfy modern domestic needs (lighting, communication, refrigeration, water supply) as well as public services (health centres, schools) and the development of a local economy (small industries and related services such as telecommunication towers and water irrigation systems). Hybrid systems can also be used for centralized village power supply by serving a mini-grid.
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Solar Street Lighting
The size of Off-Grid street lighting systems are comparable to the size of Solar Home Systems. A typical street lighting system consists of solar modules, MPPT charge controller, batteries and the DC street lamps. The common lamps are low pressure sodium (SOX) or light emitting diodes (LED).
Benefits:
Modular linear installation along the street, each light unit is an independent entity
No costly expenditure for underground or above ground cables to be purchased and laid
GSM programmability and monitoring
Fully automatic operation
Environmental benefits (clean energy)
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Pumping & Irrigation Systems
The ability to provide continuous power in any environment makes solar systems perfect for water pumping in remote areas. Solar pumping systems are flexible and modular and can be designed according to water demand or aquifer limitations. Some systems can work in hybrid configurations with other power supplies such as wind, generator or mains power. The solar systems can be designed to pump up to more than 300.000 litres per day at lower heads to smaller water quantities at higher heads up to 300 metres. The energy generated by the generator is used directly to pump the water, therefore batteries and charge controllers are not needed.
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Water Purification System
Access to drinking water, everywhere and for everyone throughout the world is possible with autonomous water purification stations operating with photovoltaic energy. They are normally using a combination of UV disinfection and solar energy to clean water and therefore ensure access to safe water for rural populations in developing countries and isolated sites.
Advantages:
Water is made microbiologically safe
Low-cost production of drinking water
The systems can be fixed on a masonry base, or built into the wall of a building (using local materials and labour),
Simple design, easy maintenance
Contribution to local economic development, making users more responsible (installation, maintenance)
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Water Desalination
Kawaida Energy in cooperation with Phaesun offers complete Off-Grid systems for water desalination. Our German support company Mörk has developed the innovative PV-driven Mörk Desalin® plant concept to improve the drinking water supply – particularly in coastal areas in developing countries. For the drawing of seawater, a well that is already salty is used, or a new well is dug by the coast. As many local materials as possible are used, such as tanks, pipes, foundation and steel frame. The focus of the project is to integrate the plant into local society and culture from the outset. System sizing is done according to the individual location and water needs.
Advantages:
Self-sufficient (through 100% renewable energy supply, high energy efficiency)
Sustainable (chemical free drinking water production)
Reliable (German quality – systems built to last)
Simple to operate and maintain
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Telecommunication Systems
Whenever you need a reliable power supply for a remote telecommunication installation the solution is solar. Electricity can be generated from the sun wherever the sun is shining. Inaccessible sites where it is extremely expensive or impossible to connect to the grid can be powered.
Benefits:
Up-front purchase of 25 years of fuel guarding against price & availability fluctuations (25 year power warranty on the solar array)
Avoids the need to regularly transport bulky and heavy fuel to inaccessible remote locations
Energy available on demand, independent on generator starting & stopping
Can be installed in conjunction with a wind or diesel generator as a hybrid system
Modular and scaleable systems to suit load characteristics
Environmental benefits (clean & silent)
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Back Up Systems
The underdeveloped electricity grid in most of the countries in the region does not only affect households that are not connected to the grid. Also those that are connected often suffer due to power cuts that can last from some seconds, to hours to at times several days. For those who need a reliable power supply, back-up systems can be individually designed. The back-up system contains an inverter/charger and battery packs to store the energy. It can be exclusively served by the grid, or can be supported by an additional source of energy like a Photovoltaic or hybrid system.
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Oil & Gas Industry
In the oil and gas industry Off-Grid PV systems are often used for cathodic protection. In order to protect exposed equipment from corrosion, the power system consists in providing DC current to the metal pipeline, storage tanks, bridges and other exposed equipment. Our solar systems are designed using the internationally recognised NSol sizing programme. Based on the location, the most appropriate environmental data is identified. System performance is then modelled, taking into account the working temperature, voltage, battery efficiency, system losses and derating factors.
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