Batteries are needed to store the energy generated to be used later when required. Battery costs have fallen by 80% in the last seven years and expected to fall by another 40-50% in the next five years. But it is still considered expensive in the price-sensitive Indian market. There is a lack of large-scale demand for lithium batteries in India and hence prices have not come down as rapidly as that of solar panels. Storage seems to be the only solution for the growing transmission and distribution problems in India. Some of the popularly used solar batteries in India are Exide, Luminous, Su-Kam, and Okaya. The cost of solar storage ranges between INR 6 –INR 10 per kW. In Luminous, solar batteries are designed at C10 capacity and the model starts from 20 Ah – 200 Ah, with 3 years and 5 years replacement warranty.
Inverter batteries are designed to provide a small amount of current consistently for a longer period of time. Inverter batteries are not discharged over a much longer time. The performance and life of an inverter depend on its battery. As such a battery is a critical and main component of an Inverter battery. It is also known as UPS batteries. It could be either a lead-acid rechargeable battery or a Lithium-ion rechargeable battery used with a home Inverter.
1). Lead Acid Battery - The main component of the battery is the lead inside it. Higher lead ensures better battery performance and quality. Lead-acid batteries are not sealed and Maintenance-free hence it requires water top-up once in 3-6 months and 2) Lithium Battery – It has made of Lithium cells which have three forms a) Lithium-Ion, b). Lithium Phosphate, and c). Lithium cobalt.
Inverter Batteries Prices in India 2021
An inverter battery costs Rs. 32,000/ kWh. A normal house needs a 4kWh system to operate independently of the grid. So you can do your math to arrive at the total investment required for installing an Inverter battery at your home. Inverters typically cost Rs.5,000-6,000. According to a report published by IHS Market, the average cost of lithium-ion batteries will fall to Rs. 7521 ($100)/kWh in 2023.
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Inverter & Batteries
Average Selling Price
Microtek inverter Msun 1435 VA
Luminous Solar NXG 1100 Solar inverter
150 Ah Tubular Solar Battery
200 Ah Tubular Solar Battery
How much does an inverter cost in India?
If you are planning to buy an inverter for your home, then there are two types of inverter: Non-Solar Inverter and Solar Inverter. The non-solar inverter is also known as Normal Inverter and its starting range is 650VA – 1800VA and Its price range is Rs. 3,500 to Rs. 9,500 depends on brands, performance, and warranty. The second type of inverter is Solar Inverter. The benefit of buying a solar inverter is that the battery can charge grid power as well as solar power both. Its starting range is 1100VA – 2550VA available in the market and its average cost of the inverter is Rs. 6,500 to Rs. 9,500. If you want to buy a high capacity inverter for running a home water pump, air conditioner, deep freezer, medical appliances, you can choose a 3kW to 10kW MPPT solar inverter and Its price range is Rs. 45,000 to Rs. 2,00,000. You can explore all inverters from here.
How to claim a warranty?
Solar batteries come under a 2-5 years replacement warranty, so if your batteries are not giving good power backup and if it is less than 60 minutes, you can claim a new battery from the manufacturer.
Best Inverter Battery
Lithium batteries are proven to be the best option for inverter batteries lately. These batteries have high energy density and the technology is witnessing significant cost reductions. It is a low maintenance battery and the self-discharge is also less. Lead-acid batteries lost the plot due to their dependence on hazardous metal lead and their low energy density.
You can look into buying a Luminous (lithium) Inverter Battery for your home.
Battery Backup Time
The backup time of a battery depends upon Battery storage capacity measured in Watt Hour (Wh) or Kilowatt-hour (kWh)
Generally, batteries are rated in AH and Voltage. To calculate watt-hour, you should multiple, Battery ampere * battery voltage (12 Volt).
The powder formula is (Wh) = Ampere * Voltage
150 Ah lead-acid battery and the battery voltage is 12 Volt.
The storage capacity is 150 AH * 12 Volt = 1800-Watt hour or 1.8 kWh.
The higher the watt Hour, the higher the will be backup time. Usually, a 150 Ah/ 12-volt lead-acid battery gives around 3 hours of backup on 400-watt Power consumption.
In India, 150 Ah is the bestselling rating as it can last up to 3-4 hours if you use Led light, few ceiling fans, Led Television, mobile and Laptop charging. For a higher duration backup, one can go for the higher Ah battery.
Similarly, in Lithium battery – 80 Ah /12.8 Volt is the most selling lithium battery which has a storage capacity of 1,000-Watt-hour power. The backup time varies with a change in power consumption.
Power Consumption vs. Battery Backup time
2 hours 30 minutes
3 hours 30 minutes
Inverter Battery Online
Earlier it was difficult to buy online as the technology was not water-proof and also bulky, so customers had to rely only on Local suppliers. But today you can easily buy online. The inverter battery is easy to transport with no damage.
Types of Inverter Battery
There are three types of battery
a) Tubular Lead-acid battery.
b) Solar battery
c) Lithium battery
There is not much difference in Tubular and Solar battery technology except warranty and life. The height of the battery determines the technology type, Tubular means tall battery and flat plate means short height battery.
Similarly, all solar batteries are C10 rated and Home batteries are C20 rated. Here c Stands for Charging
Contrary, the Lithium battery is the latest technology product available in India. It has many features over existing popular lead-acid batteries.
Fast battery charging time – 2 – 4 hours
Life cycle – 2 x than lead-acid batteries
Storage capacity per / Kg – 3 x than lead-acid batteries
How to Choose Inverter Battery?
If you are planning to buy an inverter battery online and you do not have any idea how to choose a battery for your home. You should consider this before buying any battery
1) Battery Capacity measured in Ah (Ampere-hour) or Wh (Watt-hour)
2) Battery warranty
3) Price, depends on Battery Ah and warranty.
4) Brand – A national brand having service support should be given preference
In the process of buying inverter with battery, the customer should first decide Inverter Capacity, it depends upon power consumption, if your power consumption is up to 500 watts, Inverter and UPS up to 1 KVA is the best to buy, the selection of inverter battery depends upon the duration of power backup time, if your home is having up to 4 hours of a power cut, Single /12v battery is the best buy, for long power cuts, go for Double battery Inverter system.
UPS Battery Price
UPS or Inverter battery price depends upon Battery AH and Warranty, The price ranges from ₹4000 to ₹50,000. Lithium batteries will be the costliest compared to tubular lead-acid battery because it is the latest technology product with higher energy efficiency and longer life. The other important factor which impacts the price of batteries in India are.
Lead Acid Vs Lithium battery comparison
Lead Acid Battery
Low - only 70%
Fast charged - 100% of capacity, A lithium battery can be charged 50% in just 30 minutes
9 kg/ kWh, On Average, Lithium-ion batteries weigh 3 times less than standard lead-acid batteries
High maintenance cost, Water top-up required
500 - 1000 cycles
1500 - 2000 cycles
Have no safety devices, are not sealed, and releases hydrogen during charging, in fact, the use is not permitted in the food industry
Releases no emissions are suitable for applications
Inverter and battery are two different products, hence the warranty offered on Inverter and battery differs, usually, Inverter comes with 2 years manufacturer warranty and Inverter battery warranty varies from 2 years to 5 years depending upon Battery technology
The warranty on the battery is co-related with battery life. A higher warranty on a battery will have higher battery life.
Lead Acid Batteries warranty has two aspects a) Replacement warranty and b) Pro-rata warranty is also known as buy-back warranty. If your battery fails during the replacement warranty, Manufacturers such as Exide, Luminous, Okaya will replace it with a new battery and during the pro-rata warranty period, a new battery is offered at a discounted price, which is, also known as a buyback offer.
While in Lithium battery, there is no buyback offer, manufacturers such as Tesla, Loom, Panasonic will offer replacement of the battery in case battery fails or it does not give power backup
Top 5 Best Inverter Battery Brands for Home in 2021
Inverter batteries are designed to provide a small amount of current consistently for a longer period of time. Inverter batteries are not discharged over a much longer time. The performance and life of an inverter depend on its battery. As such a battery is a critical and main component of an Inverter battery. Based on Brand Popularity, Latest Technology, Locally Product Availability, we have prepared top 5 inverter battery brands, you can choose in this summer season.
Yes. Earlier it was difficult to buy online as the technology was not water-proof and the battery was also bulky, so customers had to rely only on local suppliers. But today you can easily buy online. The inverter battery is easy to transport with no damage.
Batteries are important to provide power backup. In today’s fast pace life, no one can afford to lose time because time is money. In places, where we have excessive power cuts, having aninverter batteryis mandatory.
The battery has to be charged during the day when sunlight is available, i.e from morning 9 am to evening 5 pm.
Battery charging current = Battery Ah (Capacity) / Sunlight hours
Considering, the battery Ah is 150 AH,
Battery charging current = 150 Ah / 10 H = 15 amps.
2 nos. of 150 watts Luminous PV module should be installed at the rooftop for generating 15 amps charging current. 1 no. of 150-watt solar module generates nearly 8 amps at peak. Hence, a two-module of 300 watts will give 15 amps current to charge the battery.
Q11. What is the backup time of the battery?
Answer: The backup time of the battery is derived by Battery Capacity and Battery voltage.
So, if you buy a 150 Ah (ampere-hour) battery – it is a 12 V battery,
Voltage (v) * Current (I) = Power (watts)
12 V * 150 Ah = 1800 watts, considering 20% is loss during charging and discharging
Useable power = 1800 watts – 20% loss = 1440 watt
Backup time = Battery AH * 12 V * efficiency of battery / Power consumption in watts
Battery Ah = Ampere hour (capacity of the battery measured in AH)
The efficiency of battery = generally it is 80%
I have a 60 Ampere hour (Ah) battery, my load is 150 watts, what will be the backup time?
Q12. What to do when the battery stops giving backup?
Answer: The solar batteries are sold with a replacement warranty of 3-5 years, so if your battery stops giving backup during the warranty period, it requires replacement. Talk to the battery manufacturer and request them to replace it.
The rule is,
your battery must give less than 60 minutes of backup during the warranty period.
In case, the warranty period has expired, you can sell your old batteries to an authorized re-seller or the company. The old battery could also be sold to a new luminous dealer from where you are buying new batteries.
The buyback price of old batteries depends upon recyclable lead content inside is and the weight of the old battery. It is measured in Kg after removing the electrolyte,
As on May 2017, the lead price per kg is ₹ 90
Battery buyback price = Dry weight of the battery * Lead price per kg
I have a 100 Ampere hour (Ah) battery, how much exchange value will be given by the dealer?
Buyback price: 100Ah (battery capacity)* 27 kg (dry weight) * ₹ 90 (lead price per kg) = ₹ 2430
Q. 13 How to increase battery life – Maintenance tips
Answer: To increase the life span of the battery, follow the manufacturer's guidelines. Important battery maintenance tips are as follows:
Do water top-up once in every three months
Clean battery terminals regularly using warm water
Keep the battery in an open area. Do not keep in a closed room