What does mean by Off-Grid Solar Power System?
Off-Grid Solar System is a type of solar power system run by generating electricity from solar panels and using it to charge a solar battery through a charging controller. That electricity is then adapted using an inverter, which helps to power the home appliances or business’ equipment. The off-grid solar system is not connected in any way to your grid’s power system, hence, providing 100% self-sustaining energy for your usage.
Off-grid solar power systems (entirely self-sustaining) allow you to store and save your solar power or natural energy in batteries for future use, especially when the power grid goes down. The foremost advantage of using the off-grid solar system for home is to run household applications with solar energy during night or anytime when there is less sun exposure and only by saving the electricity in a solar battery.
The solar power system is also known as a stand-alone power system and acknowledged in the market due to several reasons like cheapest price than extending power lines in certain remote areas, 100% independence from electricity retailers, and 100% insured against rising energy prices.
On the other hand, the off-grid solar system for home uses as an appropriate alternative in the remote areas where the grid is unavailable for power supply. SolarClue is an online platform where people can buy a solar power system (Off-grid) on different brands like Supreme, V-Guard, Varistor Solar, and Luminous. The solar system price is varied from one brand to another available with SolarClue.
Components of an Off-Grid Solar Power System
Total of five components used in off-grid solar power system, which are as follows:
Solar Panel – It is one of the important elements of the off-grid solar power system. The solar panel operates based on by depending on the amount of available sunlight in the region, the usable space of roof, and energy consumption needs.
Solar Battery – It is another component of the off-grid solar system and useful to allow the home to continue to run after the sun goes down. Solar battery or solar storage device is responsible for charging the home appliances throughout the day as solar panels generate excess electricity. This is capable of storing solar power for later use of running the household appliances.
Solar Inverter - Solar power system prerequisites a solar inverter to convert the direct current (DC) collected by the solar panel into the alternating current (AC) that enables to run the household appliances and electronics. A stand-alone inverter is an ideal option for off-grid system use. Solar inverters are referred to as a solar converter or a PV inverter.
Solar Charge Controller - The solar charge controller is necessary to save battery backup for operating the different household electronic products. The controller is used in regulating the voltage that solar battery receives, to prevent overcharging, and any damage.
Off-Grid Generator System - It is considered an alternative source of energy as a backup of the system. This is the main requirement during the pick winters when solar production is at its lowest. Off-grid generator systems are also useful to power a home’s electricity needs.
Advantages of Off-Grid Solar System
• Easy installation and helps in keeping the environment clean and green
• Works independently and does not rely on the grid as power outages can occur without any warning
• Facilitates in generating enough power that can be stored and used at night or when the power grid is down
• Useful for remote areas where there is no power access from the grid
• Grid failures and shutdowns do not affect your power supply
• Helps in reducing electricity costs
Application Areas of Off-grid Solar Power Systems
Rural and remote areas - Off-grid solar system offers electricity supply in rural and remote areas with the facilities of long-term and sustainable power generation.
In areas with frequent electricity cuts – Off-grid system provides power back up facilities to those areas, which are facing frequent power cuts due to power transmission malfunctions.
What is solar panel and how it works?
Solar Panel is also known as Photovoltaic Solar Panel, made using smaller units of silicon. This is called a solar cell, which converts solar energy into electrical energy. Silicon is a semiconductor inserted between conductive layers in a solar cell.
How solar panels work? The process of solar paneling starts during the day time when proper sunlight is there. The sun rays fall on Solar PV Panels that are installed on your rooftop, and photovoltaic refers to the scientific process by which solar energy gets converted into electrical energy.
There are several silicon cells within each PV panel, and these cells react with photons (unit of light), which come from the sun to produce DC (Direct Current) or electricity. The direct current (DC) then travels into an inverter that converts it into AC (Alternating Current), which further used in your home, office, playgrounds and many other places. After this, AC current transfers to the distribution network in your home, which is capable of powering electrical appliances of your house. When Solar Panels produce more electricity than your home is using, the extra electricity gets shifted or stored in the grid. And, you can avail of the benefits for the extra electricity that your solar panels generate. Moreover, solar panels are available in different sizes and price ranges.
Solar Panel Price in India
The solar panel price in India is different from one brand to another. Based on several manufacturers and dealers, the price of the solar panel decided. You can check out the solar panel price list from top solar panel manufacturers at SolarClue and buy the preferred yet best solar panels as per your budget.
Everyone wants to spend their money on buying the product, which is of superior quality. Comprehending this fact, several brands of solar panels on SolarClue have stepped forward in the market with different price lists, based on the products’ reliability and durability.
You can find the solar panel price list from different brands on SolarClue. There are different categories and pricing of solar panels in India available with SolarClue, and according to those classifications customers can choose their items. They also can compare solar panel prices and select the best one which suits their budget.
Working Principle of Solar Panels
Solar Panels work on the principle of the photovoltaic effect, which is a method of producing direct current electricity based on the principle of the photoelectric effect. Photovoltaic directly converts solar energy (sunlight) into electricity. When certain materials expose to sunlight they absorb photons and then release free electrons, and this phenomenon is called the photoelectric effect.
Solar cells or photovoltaic cells are used to convert sunlight into direct current (DC) electricity. Though a single photovoltaic cell does not produce enough amount of electricity, hence several photovoltaic cells are mounted on a supporting frame and electrically connected to form a photovoltaic module or solar panel. The current or electricity that solar panel system provide is dependent on the effectiveness of sun rays.
Types of Solar Panels
Solar Panels are classified into two types such as Monocrystalline Solar Panels and Polycrystalline Solar Panels.
Monocrystalline Solar Panels:
Monocrystalline Solar Panels are made using extremely pure mono (single) silicon crystal that helps in converting solar energy into electricity. Monocrystalline solar panels are suitable for easy installation in smaller areas, which requires a reasonable price. However, the monocrystalline solar panel installation is ideal for a larger area, but it makes it expensive. Users will be able to get the most electricity output according to the monocrystalline panels used.
Polycrystalline Solar Panels:
Polycrystalline solar panels are made using poly (multiple) silicon crystals and known as the most commonly used type due to price and efficiency. The cells used in Polycrystalline are a small amount of quantity that makes the Polycrystalline Solar Panels a bit less efficient. For this reason, users can install a large number of polycrystalline panels to generate electricity to meet their consumption needs. As compared to Monocrystalline Solar Panel, Polycrystalline Solar Panel is considered the commonly used type as they maintain a good balance between pricing and effectiveness.
Difference between Monocrystalline and Polycrystalline Solar Panel
The difference between Monocrystalline and Polycrystalline solar panels is the advanced technology that has made them practically interchangeable. Owing to the manufacturing process and robust technology, Monocrystalline Panels are quite expensive as compare to Polycrystalline Panels. The monocrystalline solar panel comes with black and dark blue color, whereas polycrystalline panel appears in the blue mottled.
Monocrystalline Solar Panels are more efficient than polycrystalline solar panels thus, you can use slightly more power in the same size and space of monocrystalline panels. But polycrystalline panels need more equipment to produce the same amount of electrical energy as monocrystalline. For this reason, the solar panel cost is less for polycrystalline. Interested buyers can purchase any solar panel through online and also by visiting stores.
When it comes to temperature, Monocrystalline panels handle the heat slightly better than polycrystalline solar panels. This temperature difference can be noticeable especially in extremely hot areas such as deserts, as compared to residential regions. Last but not least, monocrystalline can perform in a better way even on hazy skies than polycrystalline panels.
The solar power system is a complete setup ideal for home and commercial places, which helps in producing electricity by utilizing solar energy (sunlight). A solar power system is made up of solar panel (which absorbs sunlight), inverter (which converts DC electricity into AC), mounting structure (which holds the panels in place), batteries (helps to store the extra power generated), grid box and balance of systems (wires, nuts).
In other words, a solar power system is composed of numerous photovoltaic (PV) panels, inverter (a Dc to AC power converter), and a rack system that holds the PV panels in place (solar PV panels on the roofs of homes and businesses generate clean electricity by converting the energy in sunlight). Solar power system comes in 1 kW, 3kW, 5kW, 10kW, and several other capacities. It is a good choice for those who want to reduce their electric bills and their carbon footprint.
As the prices of electricity are rising, people across the world looking for renewable energy sources for their power, or electricity needs. Solar energy has now become a popular renewable energy source because of its cost-effective price and improving efficacies. And for this reason, the solar system for home has stepped forward in the market with its great features.
On-Grid Solar System
The on-grid solar system or Grid-tied solar system is a kind of solar system that generates current only when the utility power grid is available. In other words, the on-grid system is a solar system that generally works with the grid. Saving the electricity bill is the prime purpose of installing an on-grid solar system.
The on-grid solar power system consists of Solar Photovoltaic modules / Panels, DC-AC grid-tied solar Inverter and Installation Kit (includes mounting structures, ACDB, DCDB, A.C, D.C wire, Connectors, lighting arrestor, earthling cables).
The foremost benefit of installing an on-grid solar system for home is a cost-effective solution, which helps to pay for such systems by offsetting utility bills in 3-8 yrs. In addition to this, there are some other advantages of the on-grid solar system, including:
• Zero electricity bills (consumer has to pay only for the surplus electricity he consumes because the solar power system is connected to the grid only).
• Easy maintenance (on-grid solar power system has the least number of parts along with simple installation or fitting).
• Passive income generation (with connection to the grid, the consumer can charge for the surplus electricity he has generated, which is not only beneficial in reducing your electricity bills but also helps to avail the cost benefits for the excess electricity generated).
• Provides you with at least 5 years' payback time and free electricity for the next 20 years.
Moreover, the on-grid solar system is simple enough that anyone can install it by himself. The on-grid solar system price is affordable that anyone can purchase it by investing at pocket-friendly prices.
Off-Grid Solar System
The off-grid solar system is a popular type of solar power system with backup, which works both day and night. During the day time, solar panel charges the battery to run the home appliances with the use of DC, and at night or cloudy weather days when the sunlight is not available, inverter runs your home appliances (Air Conditioners, Cooler, Television and submersible pump, etc.) using the battery power or AC current.
The off-grid solar system allows you to store your solar power in batteries for future use, especially when the power grid goes down or if you are not on the grid. Hybrid systems are capable of providing power to balance the grid power whenever the sun shines, which enable to send excess power to the grid for later use.
The utmost benefit of using an off-grid solar system is to provide power for your critical loads when the power grid becomes down. An off-grid system is more prevalent that comes with a power backup and works independently of the grid.
Benefits of using off-grid solar system:
• Works as a self-sustainable system that can work independently and not depending on the grid
• Helps in avoiding power outages, which may occur without any warning
• Helps in generating enough power that can be stored and used at night or when the power grid is down
• Reduces electricity costs (fossil fuels are still the world's primary energy source)
• Easier installation facilities
• Best alternative for remote areas where there is no power access from the grid
• Keeps the environment clean and green
Hybrid Solar System
The hybrid solar system is another type of solar power system that generates power or electricity supply in the same way as the common grid-tie solar system does. The only difference of a hybrid solar system is that such a system uses batteries to store energy for later usage. A hybrid solar system can operate as backup power, and it is possible because of the ability to use the maximum amount of stored energy (uses this energy during a blackout which is similar to a UPS system).
The term ‘hybrid solar system’ refers to a combination of battery storage and solar systems in which the off-grid system is connected to the electricity grid. Hybrid solar system is classified into three types such as All-in-one Hybrid Inverter (which contains a battery inverter/charger and solar inverter together with clever controls), All-in-one Inverter with no Back-up (works like a grid feed solar inverter which enables storage of solar energy in the battery system for the self-use), and All-in-one Inverter with Back-up (used as both an on-grid or off-grid inverter, which has a great backup capability).
Advantages of hybrid solar system:
• Allows consumers to store excess solar power or low cost (off-peak) electricity
• Allows using of solar energy during the evening times (known as self-use or load-shifting)
• Facilitates with backup power capability that helps to provide power during a blackout or grid outage like a UPS function
• Enables advanced management of electricity power and energy independence
• Reduces the power consumption from the grid
Solar Accessories
Solar accessories are important for all your small and large-scale power generation requirements. The main accessories used in solar power system installation are Batteries, Solar Charge Controllers, Off-Grid Solar Panels, and Solar Battery Enclosures.
Solar batteries: Solar batteries for home energy systems are made using lithium-ion batteries (lighter and more compact than lead-acid batteries) rather than lead-acid, and saltwater. Lead-acid batteries are used in off-grid energy systems that have a relatively short life, and lower DoD than other battery types. Saltwater batteries (newcomer in the home energy storage industry) don’t contain heavy metals as compared to other home energy storage options. Solar batteries are considered the best in terms of battery capacity & power ratings, depth of discharge (DoD), round-trip efficiency, warranty, and finest manufacturing facilities.
Solar charge controllers: Solar charge controllers are a voltage regulator to keep batteries from overcharging and also regulates the current coming from the solar panels going to the battery. A solar charge controller is categorized into two different technologies, PWM and MPPT. An MPPT charge controller is more expensive than a PWM charge controller but worth buying it even if expending more money.
Off-grid solar panels: This particular solar panel consists of a battery, charge controller, grid box, inverter, mounting structure, and balance of systems. Off-grid solar panels can store enough sunlight during the day, and use the excess power generated in the night.
Solar battery enclosures: Solar battery enclosures are used to keep your batteries safe from weather, and safe from theft. It is attributed with feature locking mechanisms that protect unauthorized people against possible electrical dangers if they happen to be tampering with your equipment. Battery enclosures for solar systems are pole-mounted or ground-mounted and suitable for indoor and outdoor applications.
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