As you are aware, a power inverter is an important item in every house and workplace to offer dependable power backup. Choosing a battery with the necessary capacity is just as crucial as choosing an inverter.
Let’s go through some fundamental selection criteria for both the inverter and the battery. This page is primarily made up of
=> How to select an Inverter for Your Home or Office
=> How to Choose an Inverter Battery
Select an Inverter
How to buy a home inverter?
You can choose and purchase an inverter system from your local dealer or online retailers such as Amazon.
Even if you buy inverters and batteries from an online retailer, most major companies offer onsite warranties.
However, before buying an inverter, you must first decide on the type and capacity, or size of the inverter.
Type of the Inverter
Inverters are categorized into three varieties based on the nature of their output waveform: square wave, modified square wave, and sine wave.
For the smooth operation of the loads, it is preferable to use an inverter with Sine Wave output.
How Can You Decide Inverter Capacity for a Home or Office?
The capacity of the inverter is the next important factor to consider. Typically, inverter capacity is given in VA (Volts-Amps).
It is the total product of the maximum voltage and current that an inverter can feed without causing the inverter system to fail.
The most significant consideration in selecting an inverter is its power or VA rating. The output voltage of a single-phase inverter is always between 230 and 240 volts. The current output rating of an inverter is strictly a design consideration.
The rating of the inverter transformer and the power transistors employed in the inverter circuit primarily influence the output rating. On the market, commercially available inverters start at 600VA.
We were aware of the inverter’s power rating. Now consider how we arrived at the VA rating for our requirement.
It is undeniably dependent on the electrical load to be run on the inverter. To establish the capacity of the inverter, we must first compute our total load (Power) in Watts.
Power Calculation of an Inverter
Let us understand inverter VA calculation in practice.
Suppose we have to select an inverter for the loads below.
LED Bulbs – 10 Nos (9W each)
LED tube light -3Nos (20W each)
Fans -4Nos (60W each)
Desktop Computer -1No (200W)
Other small loads-50W
Total Load is (10×9 + 3×20 + 4×60 + 1×80 + 1×200 + 50) = 720W
The entire load is in Watts ( W). Then, divide Watts by the normal power factor (0.8) to get VA .
Total power required in VA = Watts/Power factor = 720/0.8 = 900 VA
The total power required is 900VA. However, as you are aware, there are certain losses in the inverter power system, and it should be able to handle those as well. It is estimated to be approximately 20 percent.
As a result, the actual wattage required is = 900 x 1.2 = 1080 VA.
We may now proceed to the next higher rating available on the market, 1100VA. In our scenario, the inverter capacity required is 1100VA.
If the calculation is complicated, you can utilize any accessible internet tool for this purpose.
We’ve settled on the VA rating of the inverter. The next step in the process is deciding whether you want a stand-alone inverter, a solar inverter, or a hybrid inverter. The battery in a standalone inverter can only be charged from the grid supply.
However, in a solar hybrid inverter, we may intelligently configure the charging of the battery from solar panels or the mains supply.
In the case of solar inverters, it is also possible to consume power directly from solar panels rather than taking energy from the grid supply. As a result, we always recommend that you opt for a solar hybrid inverter.
Following the inverter type selection, our recommendation is to go with a well-known brand of the inverter. Check to see if the brand has service networks in your location.
Best Inverters in India for Home or Office Use
|Make||Model||Capacity (VA)||Amazon Price|
|UTL||Gamma Plus rMPPT Solar||1000||Check Price|
|Luminous||Zelio+ 1100||1100||Check Price|
|Luminous||Zolt 1100||1100||Check Price|
|V-Guard||Prime 1150||1150||Check Price|
|UTL||Heliac Solar||2550||Check Price|
How Do You Choose an Inverter Battery?
Another critical component of a power inverter system is battery selection for an inverter. Even if you have a high-capacity inverter system, you will not benefit if the battery cannot deliver the needed load.
In a typical inverter system, lead-acid batteries are utilized. Today, more efficient lithium-ion batteries are also employed. But they’re incredibly overpriced. If you have the funds, a lithium-ion battery is preferable.
In a low-capacity inverter system, 12V batteries can be utilized. A higher-rated inverter system, on the other hand, necessitates the use of 24V batteries.
The voltage of a single battery is always 12V. If you want 24V, however, two batteries must be linked in series. Keep in mind that the batteries in the series must have the same ampere rating.
Battery Capacity (Ah or Wh)
The capacity of a battery is measured in Ah (Ampere-hour). The capacity of a battery in unit ampere-hour (Ah) is defined as its ability to supply 1A continuously for an hour.
For example, a battery having a capacity of 150 Ah means it can deliver 150 A for one hour. But in practical cases, discharging at a higher current rate than its specified value is not advisable and it will affect the battery life.
The battery’s capacity is also given as Wh (Watt-hour). Watt (W) is a power unit that is a product of voltage (V) and current (A). This indicates that a 1Wh battery can provide 1W of electricity for one hour.
They should be linked in parallel to boost the battery system’s capacity. While the batteries are linked in parallel, extreme caution should be exercised. They’re meant to have the same voltage and Ah for optimal performance and longevity.
How to Calculate the Capacity of an Inverter Battery?
Now we understood the fundamentals of the battery. How will we choose a battery for our inverter system?
Using an example, let us learn how to calculate the inverter battery capacity for the home.
Assume we want a battery backup for our inverter for 2 hours, and our load requirement is 1080VA as we calculated earlier.
Then the capacity of the battery (Ah) is = [Total Load in VA x Back uptime (in hours)] / Battery Voltage
Then in our example battery capacity is = (1080 x 2) / 12 = 180 Ah.
If you want more backup time, connect more batteries in parallel as required.
Inverter batteries are available on the market at 100Ah, 150Ah, 180Ah, and 200Ah.
So in our example, the required inverter is 1100 VA and the battery is 180Ah (for 2 hours back up).
Lead-acid batteries, as mentioned before in this article, are commonly employed in inverters and UPS. Don’t forget that the most recent Lithium battery technology is currently on the market.
Although lithium batteries are far more energy-efficient and have a longer lifespan than lead-acid batteries, they are a much higher investment.
As a result, lead-acid batteries are widely used.
Types of Lead-Acid Batteries
Lead-acid batteries come in a variety of sizes and shapes. As a result, we must determine which sort of battery is appropriate for our application.
The construction type of a lead-acid battery determines its categorization.
Normal or Flat Plate Battery
It’s a standard lead-acid battery. In this sort of battery, lead plates serve as electrodes, and sulfuric acid serves as the electrolyte. Flat plate batteries are less expensive on the market.
For simple applications, flat-plate lead-acid batteries can be used. This sort of battery is commonly found in automobiles.
Because of the chemical activity in this battery, it continually releases poisonous fumes, and therefore should not be used in enclosed areas with inadequate ventilation.
This sort of battery has a shorter lifespan. This battery requires regular care, such as refilling with distilled water.
Tubular batteries are constructed in the same way as flat plate batteries, with the exception that tubular electrodes are utilized instead of flat-type electrodes. Here, the tubular electrodes are covered in a protective fabric.
These batteries are more efficient and can tolerate severe discharge than flat plate batteries.
Tubular batteries cost more than flat-plate batteries. However, as compared to flat plate batteries, you will have a longer life and greater energy efficiency.
It is preferable to utilize tubular batteries rather than standard flat-plate batteries, particularly with solar inverter systems. Don’t forget that this sort of battery also requires regular maintenance.
Maintenance Free Batteries
These batteries, as the name implies, do not require maintenance. It is likewise a lead-acid battery, but the electrolyte is of the gel type.
Because this sort of battery requires no maintenance because it is sealed, it is also known as the SMF (Sealed Maintenance Free) battery.
It is priced around the top of the category. High-capacity SMF batteries are incredibly tough to obtain across.
‘C’ Rating of Battery
The battery’s ‘C’ rating is a key consideration when choosing a battery for the inverter. It is defined as the maximum safe drain rate that the battery can withstand.
It’s frequently written as C5, C10, or C20. The minimum discharge duration in hours for that type of battery is indicated by the numbers 5, 10, or 20.
Let’s look at the distinctions between C10 and C20 batteries. Consider two 100Ah batteries with C10 and C20 ratings.
For 10 hours, the C10,100Ah battery may safely drain at a rate of 10A. The C20,100Ah battery, on the other hand, maybe drained at a rate of 5A for 20 hours. In this case, the C10 battery has a faster drain rate than the C20 battery.
If the discharge rate is higher than stated, the battery’s life and efficiency will be compromised.
When it comes to solar applications, always choose a C10 or C5 battery over a C20 battery. The C10 battery is more costly than the C20 battery.
These are the most important factors to consider when purchasing an inverter and its batteries for your home or office.
We hope you found this post interesting and would want to share your thoughts or recommendations about it. This information will assist you in selecting an inverter and an inverter battery for your future needs.
Do not hesitate to contact us if you want any assistance in this regard.
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Frequently Asked Questions
The unit of battery capacity is Ah, and the expansion is ampere-hour. A battery with a capacity of 150 Ah can discharge 150A current for one hour or 15A current for 10 hours.
An inverter battery is a battery that is specifically designed for use with power inverters.
An inverter’s power rating or capacity is expressed in VA. Volt-ampere is its expansion.