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Every individual in the entire world today is connected through the internet. Continuous technological innovations are bringing the world closer and closer. Power is the basis to keep this technological development working. Therefore, it is important to address the power failure issue with a suitable inverter. We have consolidated all the information that one should know before reaching out to a professional inverter battery manufacturer like Nantech power systems in Chennai. Keep reading about the various types of inverters, how they work, and aftercare procedures.

An Overview of Inverters

Inverters turn on various electrical devices even when the main supply is switched off. During power failure, they are emergency backups and convert direct current (DC) to alternating current (AC). The DC or direct current is created from either a solar panel or battery, which is converted into a 110/220 V alternating current and supplied to electrical appliances. DC is converted to AC because direct current can't travel for long distances. Every electrical equipment in a building will run on an AC current from the main power supply. Another advantage of AC is that it can experience both rise and fall and change its direction periodically, whereas DC can flow only in one direction. The voltage also reverses periodically in an AC circuit whenever the current changes direction.

How do Inverters Work?

Inverters store electricity in the form of DC in their batteries. When the power fails, the inverter starts to convert the DC to AC by passing it through a transformer. The change in voltage output instantly happens to resume the supply of electricity. Thus, as the direct current passes in an inverter, a series of switches turn on and off continuously and start stepping up with the help of a transformer. Then the switches alternate the DC signal's direction to create a sustainable AC voltage. Eventually, the electrical appliances gain a power supply even when the main power is shutdown.

Types of Inverters

Type of Load

Inverters are classified based on the output waveform and the load. Based on the type of load, the two main types of inverters are:

• Three-phase inverter: Three-phase inverter is ideal for industrial use where the power load has three phases. These inverters produce 3 phase output alternating current with six diodes and three switches. Based on the conduction period of the switches, the current is divided into a 180 or 120 degree mode.
• Single-phase inverter: As its name suggests, single-phase inverters have only a single phase of power load. They have alternating switches to counterbalance them. A single-phase inverter is classified into a full-bridge inverter and a half-bridge inverter. The full-bridge inverter has four feedback diodes and four switches. The current load is balanced by automatically switching off two switches when two of them get turned on. They determine whether the half cycle of the voltage is positive or negative. On the contrary, a half-bridge inverter has two switches connected to two diodes that decide the cycle of the voltage output.

Type of Output Waveform

Depending on the output waveform, there are three classifications in inverters. They are:

• Pure Sine Waveform: Sine waveform inverters are ideal for taking heavy loads. Most of the electrical appliances we use in our daily life are compatible with sine waveform. Thus, investing in a pure sine waveform inverter is always a good option. However, they are quite expensive, and pure sine wave inverters are available at a much higher cost than the regular ones.
• Modified Sine Wave Inverter: A modified sine wave inverter is another type that can work with almost every electrical appliance. But it has the disadvantage of reducing the device's efficiency. However, these inverters are priced reasonably to suit the budget of the normal population. Another fact to consider is that the modified sine wave inverter is not ideal for appliances that require high power, like motor pumps, air conditioners, and refrigerators.
• Square Wave Inverter: Square wave inverters are the most affordable as they are very cheap. But a square wave inverter is not compatible with many electrical appliances and has very less efficiency. Thus, they are not preferred by many people.

An Insight Into the Importance of Batteries & Its Kinds

The battery is the workhouse and backbone of an inverter. The life, performance, and efficiency of an inverter solely depend on the quality of the battery. The battery is the heart of the entire inverter system to determine the backup time. A good quality battery will offer the best solution during power failure and ensure low maintenance along with high reliability. There are three types of batteries used in an inverter, and they differ based on the technology to store the current. By knowing them in detail, you will be able to choose the right one for your usage.

Flat Plate Battery

Flat plate batteries have two electrodes and are commonly referred to as lead-acid batteries. The electrodes are immersed in water and sulphuric acid, an electrolytic solution. The positive electrode contains a lead oxide, whereas the negative electrode is made of porous lead. Flat plate batteries are lightweight and cost between nine to fifteen thousand Indian rupees. These batteries need regular maintenance, which is a major disadvantage. Therefore, tubular batteries have replaced flat plate batteries in recent times.

Tubular Battery

Tubular batteries are seen to last for a longer duration than flat plate batteries. They have a life of five years and are very efficient with less maintenance. The deep charging cycles enable these batteries to perform with greater efficiency. Tubular batteries need fewer water top -ups and are more reliable compared to the flat plate battery. However, tubular batteries cost more than flat plate batteries and are available between nine to twenty-five thousand Indian rupees.

Sealed Maintenance-Free Battery

A sealed maintenance-free battery is also known as valve regulated lead acid battery or VRLA. The reason why many prefer a VRLA battery is that it requires no maintenance. There is no need to replenish the electrodes with distilled water, and they are very safe for usage as they do not give out obnoxious gases. But the sealed maintenance-free battery is very expensive compared to tubular and flat plate batteries. The disadvantage of these batteries is that they have a shorter life.

Tips to Choose the Right Inverter

If you are confused about choosing the right inverter, the points mentioned below will help.

• The first step will be to calculate your power requirements. Identify how many devices you have, including the charging points, Wi-Fi routers, fans, and bulbs. Find out the overall power consumption and then decide the right inverter for your home.
• The capacity of an inverter is different from the power consumption. The capacity stands for the maximum load an inverter will be able to handle when every appliance is in use simultaneously. Therefore, you should always pick an inverter that has a higher power capacity than your overall power requirement. Study the capacity of various inverters available in the commercial market and choose wisely.
• Battery size plays a major role in satisfying all your demands. Correct battery size will provide the right backup without hindrance for longer durations. You have to calculate the battery size depending on how much time you want the power backup for your home.

The Bottom-line

With the above details, you would have understood all that you need to know about inverters. Now you can easily purchase the right one that suits your requirements and demands. However, make an effort to identify the inverter that will be perfect for daily usage and carefully look into its maintenance criteria before purchasing. Reach out to Nantech Power Systems, the pioneers in manufacturing inverters for commercial and domestic usage. We are the only inverter battery manufacturer in Chennai to deliver products with extended maintenance-free services.

First important factor for a person while choosing an inverter is to check the power (in Watts) consumption. The following link maybe of help - https://www.vguard.in/product/product-power-calculator

Volt- Ampere (VA)- It is a unit of electrical power in a (electrical) circuit.
650 VA is 520 Watts;700 VA is 588 Watts etc
(1kVA is 1000 VA)

What are tubular batteries?
Tubular batteries are also known as deep discharge batteries is a lead-acid battery. They provide a small amount of current, for example, 5 Amperes, for a long period of time. The electrodes of these batteries are thicker than the regular ones and hence cannot release a large amount of current. Moreover, they cannot be used in domains where a large amount of current is required in a relatively short period of time. Although they don’t provide high current, they last for a longer duration as compared to regular flat plate batteries.

WHAT ARE THE DIFFERENT TYPES OF TUBULAR BATTERIES?

Nantech Power Systems provide a multitude of tubular batteries:

• Exide
• SF Sonic
• Luminous
• Rocket
• Okaya

As there are several options, we have provided a brief yet comprehensive comparison of different tubular batteries that you can choose from.

Conclusion

To conclude, when you decide to purchase a tubular battery, make sure you understand your needs perfectly and are aware of the environment you are residing in. For places that have hot and humid weather conditions, like Chennai, all of the above Nantech Tubular batteries work perfectly well.

Introuction:

SMF (Sealed Maintenance Free) batteries, also referred to as the Value Regulated Lead Acid (VRLA) batteries are flat plate batteries that do not require topping-up and normally do not emit any fumes or gases on a never-ending basis. They eliminate the risk of acid spillage during transportation. Due to their construction it can be mounted in any orientation and does not require constant maintenance. These are utilized for high-end applications of standby power like UPS, Electric Converter, Railway Communications, and Security Systems, etc.

Nantech Power Systems offering SMF batteries with AGM technology such as follows
Comparison: Pick your best:

• Exide SMF Batteries
• Amaron Quanta
• Rocket SMF Batteries
• Panasonic Batteries

AGM technology stands for Absorbent Glass Mat. The absorbent glass mat refers to a fine fibre glass mat that is capable of absorbing sulfuric acid, making batteries spill proof.

Comparison: Pick your best

Power cuts and load shedding can be quite troubling. And getting an inverter-battery setup helps a lot. But choosing an inverter battery might be a daunting task for most of us, especially if you are getting it for the first time. Don’t worry, we at Nantech decided to put this comprehensive guide and here’s everything you need to know before getting one:

How Long Do You Need A Power Backup?

Knowing how long you need the power backup to last, helps you choose the battery with the right capacity. Let’s say you face power cuts for 2 hours everyday and you need a 12V battery as a power backup for the entire time. And you want to run the following appliances:

Required Capacity of Battery = (Hours of Power Backup) * (Power Required in Watts) / (Voltage of Battery)

Required Capacity of Battery = 2 * 270 / 12 = 45 Ah

Most batteries in the market are around 135-150 Ah and if the above case is equivalent to your real requirement, then you can even go for cheaper and lower capacity batteries!

Cost
It is essential to calculate and decide the budget as per your requirements, since the inverter and battery dealers may persuade you to buy more expensive batteries. The above example will help you with the necessary calculations and prevent unnecessary expenses.

Battery Type
Lead Acid Battery:
These are of two types:

• Flat plate battery: recommended for areas with frequent power cuts, lasting short durations.
• Tubular battery: it’s bigger than flat plate battery and is recommended for areas with power cuts lasting long durations but fewer in frequency.

Gel Battery:

• Recommended for offices and homes where power backup lasting several hours is necessary.
• Zero reduction in performance, even after years of usage.
• No water top-up and maintenance required.
• Easy installation.
• Eco-friendly battery with minimal toxic emissions.
• No chance of acid spillage!

Weight of the Battery

The weight of the battery is something you might overlook and not take into consideration first but it tends to be an important factor for those who are frequently on the move! Batteries have different weights when they are filled and empty(dry). If you frequently shift places, consider buying a less bulky battery. In case you still need a heavy battery, look for the ones equipped with a trolley.

Replacement, Warranty and Services

Most reputed companies offer free services within the warranty period (also called ‘flat warranty period’). In case your battery faces issues within a few months of purchase, it could be replaced, provided the fault occurs and is registered within the replacement/pro-rata warranty period. It also helps if the company provides installation and maintenance services, since this can be a tough task for most individuals. Hence, warranty period is also an important factor while purchasing a battery!

We hope this comprehensive guide helped you and made the task of buying a battery easier! If you are looking for an authorised battery dealer, we at Nantech sell batteries of numerous reputed companies.

Inverter Battery Woes? Let Us Help You Solve It

Inverters in Chennai are essential. No home or office can do without them because a single power cut means all the gadgets and appliances; we rely on every day become useless. Inverters provide the power back-up necessary for a continued supply of electricity to them.

But like any other machine, inverters are also prone to common problems. In this article, we explore the solutions to the most common issues that crop up in inverters and batteries.

Why Is Your Inverter Not Turning On?

These are the possible reasons along with remedies why your UPS or inverter is not switching on:

• The battery is not connected. Ensure that the connection is made correctly.
• The terminals of the battery are loose. Make sure that they are tight and precisely fit.
• The terminals of the battery are loose. Make sure that they are tight and precisely fit.
• The inverter is tripped. In this case, all you need to do is press the reset button on it.
• The battery has a fault. The solution is to replace it.
• The terminals are rusty. Clean out the corrosion for the inverter to work suitably.
• The terminals are reversed. Use the inverter manual to connect the right terminals.
• The battery has become very weak. You will need to charge it. In case the battery is very old, you might need to replace it.
• The battery is completely discharged. The solution here is to charge for some hours before switching the inverter on.

Why Is Your Inverter Battery Not Charging?

The most common cause of battery not charging is because it is dead. You will have to replace it for the inverter to work. There are three other reasons for it:

• The fuses have melted. You will need to replace them.
• The rectifiers are burnt. You will need to take the inverter to the service centre.
• The battery connection is loose due to corrosion. Clean the terminals to remove rust and then clamp the connection firmly.

Why Is Your Inverter Making A Beeping Noise?

• An inverter makes a beeping noise when it runs on the power of the battery. The sound is like an alarm that indicates that the inverter has transferred from normal electricity to battery operation. Since this is just an indicator, there is no problem to solve.
• When the battery of the inverter is very low, it begins to beep. The sound tells you that the inverter will shut down pretty soon unless you charge the battery. The inverter is forced to shut down to prevent the battery from being discharged too much. Generally, the beeping begins two minutes before shut down. The solution here is to recharge the inverter for a few hours. It will stop the beeping sound.

• One more reason your inverter may be making a constant beeping sound is capacity overload. When there are too many gadgets and appliances connected to the inverter, it reaches an overload condition. The beeping is an alarm to inform you of the same. There are two remedies to this problem. One, you can remove all non-essential devices from the inverter. Two, you buy a new inverter that has sufficient capacity to take a load of all the equipment at your home or office. The right size inverter will never beep due to capacity overload.
• One last reason the battery is beeping is a failed self-test. This is not a common cause, but it does happen. Every 14 days, the inverter conducts a self-test. The test checks the integrity of the battery. If the test fails, the inverter starts beeping. This happens when the battery is near the end of its life. The solution is to get the battery replaced within one month.

In Conclusion:

The reasons described in the post above are some of the most common problems that people face with inverters. Thankfully, a majority of them have simple solutions that can be done at home. If that fails, then an inverter repair centre can resolve them quickly.

Also Read: HOW USEFUL IS THE INVERTER?

That said, it should be noted that each issue, like beeping sound or not charging, may have a different symptom and underlying reason. For instance, if the inverter is making one, constant beeping noise it means capacity overload. Whereas, if the battery beeps in a continuous manner, then the battery is low. Essentially, you have to pinpoint the symptom to get to the issue.

If you are unable to remedy the problem at home, it is highly advised to take the inverter to a supplier in Chennai. They will have experts who can find the issue in a matter of minutes and give you a solution for it!

The humble inverter is the device of choice when it comes to dealing with power outages. Of course, there is a generator. It is bigger, and a more powerful device, but it is not something that suits everyone’s purse.

The application of a power inverter extends well beyond supplying electricity during times of power outage. The lifeline of many electronic devices, the inverter is an intrinsic part of electric cars and bikes, industrial motors, power tools, refrigerator compressors, and computer systems.

Also Read: Inverter Batteries – a Comparative Guide

The omnipresent air conditioner is not on the list, as you can notice. That is what we are here to find out: can your inverter run your air conditioner and save you from the unforgiving heat and power outages during the unbearably hot Indian Summers?
Especially in cities like Chennai where summer temperatures can reach intolerable extremes, this option is nothing short of a blessing.

Understanding How An Inverter Works

Before we can “Yes” or “No” to the first question, it is crucial to understand the basic design of the inverter and the way it functions.

What is the basic design of an inverter and how does it work?

• Without going into highly complex explanations, we can simply state that the inverter is basically designed to convert Direct Current Voltage (DC) to Alternating Current Voltage (AC).
• This AC power is what allows the functioning of common household appliances when there is a power outage from the public power grid.
• Home inverters come with a battery, which is the main Direct Current (DC) source.
• The battery is connected to the AC power supply in your house that comes from the main power grid.
• When there is normal power, the battery is continually charged by DC.
• A transformer and rectifier circuit is used to draw electricity from the AC and charge the battery.
• In the instance of a power failure, the battery that is fully charged up produces Direct Current. But those devices in your home need Alternative Current (AC) to work or they won't budge!
• Here’s where an inverter does its job. The batteries supply the DC through an inverter that converts it to AC.
• Thereby, all the devices are temporarily revived.

How Compatible Is Your Air Conditioner?

An air conditioner used for a 150 square feet room can have a range of 5000 BTUs or British Thermal Unit. An air conditioner this small will utilize about 4 or 5 amps of electricity.
A room that measures beyond 2,500 sq.ft will require an air conditioner with 36,000 BTUs. The amperage for such a powerful air conditioner will be around 15-17 on full power. However, when the unit reaches its set temperature limit, the amperage will be 6 or 7.

Hence, the answer is Yes, the air conditioner can work on an inverter. But there’s a catch. The bigger the capacity of your air conditioner, the bigger the inverter you will need.

Some Important Tips To Keep In Mind

• A 1 ton A/C will need a 3.5 KVA inverter to run when there is a power outage. Now, that is only the minimum capacity. The capacity of the inverter increases with the tonnage of the A/C.
• The lifeline of all inverters is the device that supplies power. These devices range from solar panels, hydropower, windmills, and inverter batteries.
• It must be determined if these power sources have the capacity to generate surge power along with non-stop electricity to keep the air conditioner running.
• The air conditioner’s cooling time will be longer than normal when it is powered with an inverter.
• The inverter has to have the capacity to handle the electricity load and power surges. Hence, it is imperative that you make a wise choice, depending on the capacity of your air conditioner and how long you propose to keep it working.

Nantech: Chennai’s Premium Inverter Battery Dealers

Investing in a high-quality inverter battery is not a seasonal investment if you are living in a city like Chennai. With temperatures calling for air conditioners for a good part of the year, it is a wise choice to invest in inverter batteries that will last longer and work to accommodate voltage fluctuations and power surges.
Nantech Power Systems P Ltd is a leading inverter battery dealer in Chennai. It is Top -notch company that specializes in the Sales and Service of Inverter Batteries.

Up and running since 1996, Nantech is an ISO 9000: 2015 Certified Company. Nantech’s robust engineering methods, and manufacturing and customizing services are on par with international standards. It comes as no surprise that Nantech’s prestigious clientele includes a host of well-known industries and households all over Chennai.

Join the coveted list and quit dreading summers in Chennai !!! Dial +91 99623 98222 for more information!

Have you faced a situation when the main power supply unexpectedly goes out? Well, in such cases, the UPS aka Uninterruptible Power Supply delivers reliable emergency power to the electronics for a few minutes. These inverter UPS batteries use lead-acid batteries to hold the charge even after a power cut. What if your existing UPS battery backups don’t function properly due to failing batteries? You shouldn’t toss the UPS system somewhere but recycle the same properly.

Well, it is important to recycle or dispose the battery carefully. When it is not disposed properly, the lead-acid batteries can cause a health hazard. The harmful acid of the old battery will be absorbed by the surrounding ecosystem, farming land and waterways, and causes severe contamination. Eventually, this can be harmful to both the environment and health of people. So, the lead-acid batteries have to be recycled safely.

When inverter battery dealers in Chennai suggest recycling

Similar to batteries powering automotive startup motors, these UPS batteries store electricity via reverse chemical reaction process that involves lead-acid. Batteries work in regular charging and discharging cycles. When any electronic device runs on battery power such as a laptop, it discharges continuously. This can be reversed with the recharging of the battery. However, there is a cap to the limit of charging and discharging cycles that can happen over time. Notably, no battery can hold the charge for a longer time. If the upper limit exceeds, then the battery should be replaced to continue enjoying the advantages of a UPS.

Also Read: Emerson UPS Preventive Maintenance Checklist – Get To It!

This is when you need to consider recycling the old batteries. It reclaims valuable components and prevents environmental hazards. There are government rules and initiatives also in the disposal process of lead-acid batteries. Notably, it is against the law to dispose of these used inverter batteries anywhere you like. You need to ensure that the proper recycling process suggested by the best inverter battery dealers in Chennai is followed. Do keep in mind that the battery symbols and labels indicate the specific ways you need to follow to recycle to dispose of it safely and the chemical reactions that could happen.

Well, do not get too worried thinking about the safe disposable of used UPS batteries. It is a rather simple process, but the proper guidelines should be followed. There are many online ups dealers in Chennai who will handle the process and give you the desired result. So, you just have to follow the same and get the work done.

The recycling process of inverter UPS batteries

Once inverter UPS batteries are removed, it should be recycled properly by taking it to a qualified recycler or one of the best inverter battery dealers in Chennai. The experienced recyclers or dealers will adhere to stringent regulations so that the health and environmental hazards are reduced. They will crush the used batteries into nickel-like pieces and separate the individual components. After this process, the recycled plastic is used to produce new plastic goods such as automotive parts, wheels, and plastic.

Likewise, the lead obtained from the used batteries is shipped to industrial manufacturers. If you are not aware, recycled lead obtained from inverter battery dealers in Chennai is used for a range of industrial applications including military ammunition, roofing material, TV screens, electronics, and nuclear shielding.

The best inverter battery dealers in Chennai are quite experienced in recycling used batteries. They employ a reliable recycling process so that it is nearly 80% of a new lead-acid battery. The recycling process can happen indefinitely and old components can be used to make new batteries that can be recycled again and again.

Inverters have become an essential part of our lives. These wonder machines invaded each and every home in the city during those horrific power cut days some years ago. Inverter battery dealers in Chennai will vouch for a huge increase in their sales during that period. Since then, the public has realized the immense benefits of using inverters even in the absence of frequent or regular power disruptions.

Inverter Battery Dealers In Chennai Explain Why They Are So Necessary Here.

Given the scorching heat of the Chennai summers and the ever-present menace of mosquitoes in the rainy season, even a few hours of power outage in our city can cause much discomfort and inconvenience. You just cannot get a good night’s sleep here without the fans running at least. Inverters are thus such a godsend for the residents of Chennai.

Also Read: Here’s How You Can Increase Battery Life

The heart of an inverter is its battery. It is the most crucial element of the entire set up. The battery is charged from the mains when there is power and kept on stand by. When the input is shut off, it acts as a backup power source, with enough charge to run a limited number of appliances for a certain number of hours.

But very often we find that the battery’s life does not last as long as you expected it. In many cases, the battery needs to be replaced within 2 or 3 years, and they are not inexpensive. If you ask most Amaron or Exide dealers in Chennai, they will tell there are several reasons for that.

Do Not Compromise On Quality Say Dealers Of Amaron or Exide Inverter Batteries In Chennai

#Battery Quality

This is a common mistake a lot of people make. They compromise on quality to save money and end up having the battery die on them in no time. A good battery will last for a longer time than the less expensive ones. So, look for top quality brands like Exide or Amaron which use the very best materials and elements in their battery construction. Several Exide and Amaron battery dealers in Chennai like Nantech deal with a wide range of inverter batteries from such renowned brands. They even come with a few years guarantee on the life of the battery.

#Battery Usage

The more the usage of the battery, the shorter its life span. The battery undergoes several hundreds of charging and discharging cycles in its lifetime. A reduction in these numbers can extend its life. Also, make sure you do not overload the battery during a power outage. Run only those appliances that are absolutely necessary.

#Battery Charger Quality

Not just the battery, its charging device should be of good quality too. Even the best quality batteries available would not function well and would become inefficient if the charger is not good. They would run out of charge way too soon.

#Battery Overcharging

Overcharging of inverter batteries can significantly reduce their life span. It causes overheating of battery plates and corrodes away the terminals. So, turn off the inverter when the battery is fully charged and turn it back on only when there is a power cut.

Take Good Care Of Inverter Batteries For Longer Life, Say Exide Dealers In Chennai.

#Battery Maintenance

Keeping the inverter battery in good condition with regular maintenance is a sure-fire way to extend its lifetime. Check the distilled water levels and replenish them regularly. Make sure the terminals are clean and free of corrosion. These simple precautionary steps go a long way in making sure that your battery does not die a premature death.

With all this information we are sure you will be able to make your inverter battery last for years without failure.

Power cuts are a norm in Indian households, and if you are frustrated with the frequent power cuts, then you should plan to invest in an inverter for your house. While selecting
the best inverter and battery for home you should choose the one that suits your needs as it should be based on the power requirements. So a little research and understanding the basics will help you in purchasing the inverter that is needed for your home.

Tips To Select The Best Inverter For Home

Power requirement: The most important thing to find out before you go ahead with selecting an inverter is the power needs of your home. In simpler terms, the electrical appliances that you want to run when there is a power failure define your requirement. For example, if you want to run a fan, two tube lights, and a TV when there is a power cut, then it is calculated as below.
1 Tube light = 60 Watts
1 Fan = 70 Watts
1 TV = 120 Watts

Then your electricity needs are 2*60+70+120 = 310 Watts.

To calculate the VA rating needed for an inverter, the power factor of it should be calculated. The power factor is the ratio of amount of power required by the electrical appliances to the amount of energy supplied by the inverter. Inverter manufacturers in Chennai say that the power factor lies in the range of 0.6 to 0.8 and the efficiency of these inverters also ranges from 60 to 80%.

Also Read: How to Choose a Correct Sized Voltage Stabilizer?

Type Of Inverter:

An inverter converts current from DC to AC and depending on the kind of AC there are two types of inverters called the Square wave and the Sine wave inverter. The sine wave inverter and battery price are costly but worth the money you pay as they are safe, long-lasting and durable. If you want a less expensive but moderate performing inverter, then a modified sine wave inverter can be purchased, but there are very few models of these present in the market currently.

How to select the best inverter battery for home

The battery is the main component of an inverter. An inverter life and its performance is dependant on the battery quality. The battery determines how long an inverter can help run your appliances when there is a power cut. The battery capacity is what decides the number of hours of backup that it provides thereby helping run the inverter. There are many battery capacities ranging from 100Ah to 180 Ah available in the market. After determining the power requirement, you should calculate the battery backup needed for your home. For example, if you need a backup of 2 hours
The capacity of the battery is calculated using, the following formula.

No. of watts of power required * hours of backup/Voltage of the battery
Considering the earlier power requirement of 310 Watts
Battery capacity = 310*2/ 12 = 51 Ah so a battery of 100Ah will be best suited for your house.

Buying inverters and batteries:

You can purchase inverters online or but it is best to purchase batteries from inverter battery dealers in Chennai as they are hazardous products and hence best purchased in stores. You can check these products on the manufacturer's website too to find the latest models.