Tubular is a well-known brand in the battery market, offering high-quality and reliable batteries for various applications. Whether you need a battery for your home inverter, solar system, or automotive use, tubular provides a range of options to meet your power needs. Known for their long-lasting performance and robust construction, tubular batteries ensure that you have an uninterrupted power supply during outages. Their innovative technology and superior materials make them a preferred choice for many consumers in India.
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What are tubular batteries
Tubular batteries are the most popular and reliable battery type used with home and office inverter systems in India. They use tubular positive plates that hold more active material, delivering better charging efficiency, longer backup duration and a significantly longer operational lifespan than standard flat plate batteries. Designed for deep discharge cycles and regular daily use, tubular batteries handle long power cuts effectively without deteriorating quickly. Their larger electrolyte capacity also means fewer water top-up intervals, making them a low-maintenance and cost-effective power backup solution for Indian households and offices
What are the key features of tubular batteries
Tubular batteries offer a strong combination of performance, durability and reliability that makes them the preferred choice for inverter backup in India. Here is what sets them apart from standard inverter battery alternatives:
- Tubular positive plate design for superior performance: The tubular plate design holds more active material per cell than flat plate alternatives, delivering higher energy density, better charge acceptance and more consistent power output across every discharge and recharge cycle throughout the battery's lifespan.
- Long operational lifespan: Quality tubular batteries last between five and eight years under normal home use conditions, significantly outlasting standard flat plate batteries that typically need replacement within three to four years. The longer lifespan delivers a better total cost of ownership despite the higher upfront price.
- Deep discharge tolerance: Tubular batteries are designed to handle deep discharge cycles where the battery is drained significantly before recharging. This makes them ideal for areas with long and frequent power cuts where the battery is regularly drawn down to a low charge before mains power returns.
- High charging efficiency: The tubular plate construction enables faster and more efficient charging than flat plate batteries, recovering charge more quickly after a deep discharge and ensuring the battery is ready for the next outage with minimal delay after power returns.
- Large electrolyte reservoir reduces top-up frequency: Tubular batteries have a larger electrolyte volume than flat plate alternatives, which means the water level depletes more slowly during charging and requires top-up less frequently. Most quality tubular batteries need distilled water refilling only every two to three months under normal use.
- Low maintenance compared to flat plate batteries: While tubular batteries are not maintenance-free, they require significantly less frequent attention than older flat plate models. The combination of a larger electrolyte reservoir, robust plate construction and lower water loss during charging makes them one of the least demanding flooded battery types for everyday home use.
What are the specifications of tubular batteries
Understanding the technical specifications of tubular batteries helps you match the right model to your inverter capacity and backup requirements.
| Specification | Details |
| Battery capacity range | 100Ah to 220Ah |
| Voltage | 12V |
| Battery type | Flooded lead acid, tubular positive plate |
| Backup time (100Ah at 400W load) | Approximately 2 to 3 hours |
| Backup time (150Ah at 400W load) | Approximately 3 to 4.5 hours |
| Backup time (200Ah at 400W load) | Approximately 4 to 6 hours |
| Charging time (fully discharged) | 10 to 14 hours |
| Charging current | 10A to 15A |
| Electrolyte | Dilute sulphuric acid |
| Water top-up interval | Every 2 to 3 months |
| Warranty | 3 to 5 years (brand and model dependent) |
| Maintenance type | Flooded, requires periodic distilled water top-up |
| Operational lifespan | 5 to 8 years |
| Compatible with | All standard home and office inverter systems |
What are the types of tubular batteries
Tubular batteries are available in three main configurations, each suited to different inverter setups and backup requirements.
Short tubular battery:
Short tubular batteries, also called ST batteries, are the most compact tubular battery type and are designed to fit comfortably under or beside standard home inverters with limited vertical clearance. They have a shorter plate height than tall tubular models and are available in capacities from 100Ah to 150Ah. Short tubular batteries are a popular choice for small apartments, single-room inverter setups and locations where the battery must be positioned in a confined space such as a cabinet or under a desk. While they offer shorter backup duration than tall tubular models of the same capacity, they deliver the same quality of tubular plate construction and comparable lifespan under normal use conditions.
Tall tubular battery:
Tall tubular batteries, also known as TT batteries, are the most widely used tubular battery type in Indian homes. They use taller tubular positive plates that hold significantly more active material per cell, delivering longer backup duration, better deep discharge tolerance and a longer overall lifespan than short tubular alternatives. Tall tubular batteries are available in capacities from 120Ah to 220Ah and are the standard recommendation for households with moderate to heavy inverter use and daily outages of two to six hours. Their larger size requires adequate floor space and height clearance near the inverter installation point.
Double tubular battery:
Double tubular batteries, also referred to as DT batteries, represent the premium tier of the tubular battery range. They use an enhanced tubular plate design with greater active material density and a more robust construction that delivers the longest backup duration, the highest cycle life and the best deep discharge recovery among all tubular battery types. Double tubular batteries are recommended for areas with very long power outages, high daily discharge depth and users who want the maximum possible lifespan from a single battery investment. They are available in capacities from 150Ah to 220Ah and are priced higher than standard short or tall tubular alternatives.
What backup capacity can you expect from tubular batteries
The actual backup time from a tubular battery depends on its Ah capacity, the total wattage of the connected load and the efficiency of the inverter. These pointers explain how to estimate backup duration accurately for your specific requirements.
- 100Ah tubular battery backup at a typical home load: A 100Ah tubular battery running a 400-watt load, which typically covers two ceiling fans, four LED lights and one small television, delivers approximately two to three hours of backup. Reducing the load by switching off the television extends backup duration to approximately four hours for the fans and lights alone.
- 150Ah tubular battery for medium household backup: A 150Ah tubular battery at the same 400-watt load delivers approximately three to four and a half hours of backup, making it the most popular choice for households in areas with daily outages of three to four hours across most Indian cities and towns.
- 200Ah tubular battery for long outage areas: A 200Ah tubular battery at a 400-watt load delivers approximately four to six hours of backup, making it the recommended choice for households in rural areas or tier 3 cities where daily power cuts of four to eight hours are common during summer months.
- Battery capacity degrades slightly over years of use: New tubular batteries deliver close to their rated Ah capacity. After three to four years of daily cycling, a well-maintained tubular battery retains approximately 80 to 85 percent of its original capacity. After five to six years, capacity drops further, which is when most households begin noticing reduced backup duration compared to when the battery was new.
- Inverter efficiency affects actual backup time: The backup duration calculations above assume an inverter efficiency of approximately 80 percent, which is typical for standard home inverters. High-efficiency pure sine wave inverters with efficiency above 85 percent deliver slightly longer backup from the same battery capacity.
Price list of tubular batteries in India (April 2026)
Tubular batteries are available across a range of capacities and brands in India. The table below covers the most popular models and their approximate prices to help you compare options before buying.
| Brand and model | Type | Capacity | Warranty | Price (approx.) |
| Exide Inva Tubular IT500 | Tall tubular | 150Ah | 5 years | Rs. 12,000 to Rs. 14,500 |
| Luminous Red Charge RC18000 | Tall tubular | 150Ah | 5 years | Rs. 12,500 to Rs. 15,000 |
| Amaron Inverter IR 150TT | Tall tubular | 150Ah | 5 years | Rs. 11,500 to Rs. 14,000 |
| Livguard INVTJ18N60 | Tall tubular | 180Ah | 5 years | Rs. 14,000 to Rs. 16,500 |
| Exide Inva Tubular IT500D | Double tubular | 150Ah | 5 years | Rs. 13,500 to Rs. 16,000 |
| Luminous RC25000 | Tall tubular | 200Ah | 5 years | Rs. 16,000 to Rs. 19,000 |
| Genus Power GHD130 | Short tubular | 130Ah | 3 years | Rs. 9,500 to Rs. 12,000 |
| Su-Kam Sonic 150Ah | Tall tubular | 150Ah | 4 years | Rs. 11,000 to Rs. 13,500 |
| Okaya Hadi OT150 | Tall tubular | 150Ah | 5 years | Rs. 11,500 to Rs. 13,500 |
| Microtek MTK100TT | Tall tubular | 100Ah | 3 years | Rs. 7,500 to Rs. 9,500 |
Disclaimer: Each model's features, availability, and pricing are subject to change and may vary. For the most accurate and up-to-date information, please visit the official website.
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How do you choose the best tubular battery for your inverter
Choosing the right tubular battery requires matching the battery capacity to your inverter rating, daily load and typical outage duration. These pointers guide you to the most suitable choice.
- Match battery capacity to your inverter's rating: Every inverter has a recommended battery capacity range specified in its product documentation. Always use a battery within this range. Using a battery with too low a capacity strains both the battery and the inverter, while too large a battery may not charge fully within the available mains power duration between outages.
- Calculate your required backup duration first: Before choosing a battery, determine how many hours of backup you need during a typical outage and what appliances you need to run. Use this to calculate the minimum Ah capacity required, then choose the next size up for a comfortable margin of backup beyond your minimum requirement.
- Choose tall tubular for the best balance of capacity and lifespan: For most Indian households, a 150Ah tall tubular battery from a reputable brand delivers the best balance of backup duration, lifespan, price and availability. It suits the majority of standard inverter setups and provides adequate backup for three to four and a half hours at a typical home load.
- Prioritise warranty length and brand service network: A five-year warranty is the strongest available on tubular batteries in India and is offered by Exide, Luminous, Amaron and Livguard on their premium models. Always buy from a brand with an accessible authorised service centre in your city to ensure warranty claims and water top-up support are readily available.
- Consider double tubular for areas with very long outages: If your area experiences daily power cuts of six hours or more, a double tubular battery with higher cycle life and better deep discharge recovery is worth the additional cost. The superior construction delivers meaningfully longer lifespan under the high stress of repeated deep discharge cycles.
Why should you choose a tubular battery
Tubular batteries are the most recommended battery type for home and office inverter systems in India for a combination of practical and financial reasons that make them the best long-term investment for power backup.
- Longest lifespan among all inverter battery types: A quality tubular battery from a reputable brand lasts five to eight years under normal home use, compared to three to four years for standard flat plate batteries. This longer lifespan means fewer replacement cycles over a decade of ownership, reducing total expenditure on batteries significantly over time.
- Best performance for Indian power cut patterns: Indian power outages are typically long, frequent and followed by relatively short recharge windows. Tubular batteries are specifically designed for this deep discharge and recharge pattern, maintaining consistent performance and capacity across hundreds of discharge cycles without the rapid degradation that affects flat plate alternatives under the same conditions.
- Lower total cost of ownership despite higher upfront price: While tubular batteries cost more to purchase than flat plate models, their longer lifespan, lower water consumption and better cycle life result in a lower total cost per year of operation, making them the more economical choice when evaluated over a five to eight year ownership period.
- Compatible with all standard home inverters: Tubular batteries are compatible with all standard 12V home and office inverter systems from every major brand including Luminous, Microtek, Su-Kam, Exide, Livguard and Genus. You do not need a specialised inverter to use a tubular battery, and upgrading from a flat plate to a tubular battery requires no changes to the existing inverter setup.
- Widely available with strong after-sales support: Tubular batteries from leading brands are stocked by authorised dealers across virtually every Indian city, town and district, making purchase, warranty service and replacement straightforward throughout the battery's operational life without any supply or support accessibility concerns.
What are the maintenance tips for tubular batteries
Regular and straightforward maintenance keeps your tubular battery performing at its best and significantly extends its operational lifespan across years of daily use.
- Check the water level every two to three months: Open the vent caps on each cell of the tubular battery every two to three months and check that the electrolyte level is between the minimum and maximum marks on the side of the battery. Top up only with distilled water when the level falls below the minimum mark. Never use tap water as it contains minerals that contaminate the electrolyte and damage the battery plates over time.
- Use only distilled water for topping up: Always use commercially available distilled water for topping up tubular batteries. Tap water, RO water and filtered water all contain dissolved minerals and ions that react with the battery acid, accelerating plate corrosion, reducing capacity and shortening the battery's operational lifespan significantly even with a single incorrect top-up.
- Keep terminals clean and corrosion-free: Inspect the battery terminals every two to three months for white or bluish corrosion deposits that increase terminal resistance and reduce charging efficiency. Clean corroded terminals with a dry toothbrush or a very small amount of baking soda solution, rinse with clean water, dry thoroughly and apply a thin layer of petroleum jelly to prevent future corrosion formation.
- Ensure the battery room or storage area is well-ventilated: Tubular batteries release hydrogen gas during charging, which is flammable and can accumulate to dangerous levels in enclosed spaces. Always store and operate tubular batteries in a well-ventilated area, keep open flames and sparks away from the battery at all times and never charge a battery in a completely sealed cabinet or enclosed room.
- Avoid deep discharge beyond 50 percent capacity whenever possible: While tubular batteries are designed for deep discharge cycles, repeatedly discharging below 50 percent of rated capacity accelerates plate degradation and shortens overall battery life. Where possible, set your inverter's low battery cut-off at a level that prevents the battery from discharging below 50 percent during normal use.
- Schedule an annual professional inspection: Have a qualified technician inspect the complete inverter and battery system once a year, checking the specific gravity of the electrolyte with a hydrometer, verifying terminal connections, testing battery voltage under load and confirming the inverter charging parameters are correctly set for your specific tubular battery model and capacity.
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Tubular batteries are primarily used for inverter and power backup systems in homes, offices, shops, and small businesses. They are designed to provide reliable backup during power outages and can support essential appliances such as lights, fans, televisions, computers, and Wi-Fi routers for extended durations.
Yes, tubular batteries are among the most popular choices for home inverters. They are designed to handle frequent charging and discharging cycles, offer longer backup durations, and generally have a longer service life than many conventional battery types, making them suitable for regular residential use.
The main difference lies in their internal construction. Tubular batteries use tubular positive plates that are designed for deep discharge applications and longer life, while flat plate batteries use flat grids and are generally more affordable. Tubular batteries typically provide better backup performance, longer durability, and improved efficiency for inverter applications.
The backup duration of a tubular battery depends on its capacity, the inverter rating, and the connected electrical load. Under typical household conditions, a tubular battery can provide backup ranging from 3 to 8 hours or more. Higher-capacity batteries paired with energy-efficient appliances can deliver longer backup times.
Charging time varies depending on the battery capacity, inverter charging current, and battery condition. In most residential applications, a tubular battery may take approximately 8 to 12 hours to reach a full charge after a deep discharge cycle. Actual charging duration may vary based on usage patterns and power availability.
Pure sine wave inverters are generally considered the best choice for tubular batteries. These inverters provide stable power output, improve battery performance, and support a wide range of household appliances. The inverter capacity should be selected according to the battery rating and the total power requirement of connected devices.
Yes, tubular batteries are considered energy-efficient power backup solutions. They offer effective charge retention, support repeated charge-discharge cycles, and help maximise inverter performance over extended periods. Their ability to deliver consistent backup while maintaining durability makes them a preferred option for residential and commercial inverter systems.
