When customers ask, “150Ah battery pe kitne fan chal sakte hain?”, the honest answer is: It depends—but not in a confusing way. It depends on the inverter, the wattage of the fan, battery efficiency, and how long you want backup.

As a tubular battery manufacturer, we created this guide to give you a simple, practical, real-world explanation—exactly what a homeowner, shop owner, or small business needs before choosing the right backup solution.

 

Understanding the Basics First

Before calculating the number of fans, let’s quickly break down what a 150Ah battery can actually deliver.

1. What does 150Ah mean?

Ah = Ampere hour
150Ah means the battery can deliver 150 amps for 1 hour, or 15 amps for 10 hours, and so on.

2. What is the voltage?

Most inverter batteries in homes are 12V.

So the total energy a 150Ah battery can store is:

Energy (Wh) = Ah × Voltage = 150 × 12 = 1800 watt-hours

This means your battery can supply 1800 watts for one hour, or 900 watts for two hours, etc.

3. But you cannot use 100% battery

A good tubular battery should be discharged only up to 80% (DOD) for long life.

So usable energy = 1800 × 0.8 = 1440 watt-hours

This is the realistic backup you can expect.

 

How Many Watts Does a Fan Consume?

Typical ceiling fan wattages:

Fan Type	Power Consumption
Old ceiling fan	70–90W
Normal modern fan	50–60W
BLDC fan (energy-saving)	28–35W
Table fan	~40–50W

For calculation, we usually assume 60W per ceiling fan.

 

Now the Main Question: How Many Fans Can a 150Ah Battery Run?

Short Answer:

A 150Ah tubular battery can run:

 Ceiling Fans for around 5–6 hours

OR

 3 Ceiling Fans for around 7–8 hours

OR

 2 BLDC Fans for 12–15 hours

This is a practical, real-world estimate—not a theoretical one.

But let’s calculate so you can understand clearly.

 

Practical Calculation (Simple Language)

Step 1: Total usable battery backup

Usable watt-hours = 1440Wh

Step 2: Total fan load

If you run 4 normal fans:

4 fans × 60W = 240W

Step 3: Backup duration

Backup = 1440 ÷ 240 = 6 hours

So your 150Ah battery can run 4 ceiling fans for 6 hours.

If you reduce the load, the backup goes up.

 

Calculation for Multiple Scenarios

Scenario 1: 2 Fans

Load = 2 × 60W = 120W
Backup = 1440 ÷ 120 = 12 hours

Scenario 2: 3 Fans

Load = 3 × 60W = 180W
Backup = 1440 ÷ 180 = 8 hours

Scenario 3: 4 Fans

Load = 4 × 60W = 240W
Backup = 1440 ÷ 240 = 6 hours

Scenario 4: 5 Fans

Load = 5 × 60W = 300W
Backup = 1440 ÷ 300 = 4.8 hours

Scenario 5: 4 BLDC Fans

BLDC Fan power = ~30W
Load = 4 × 30 = 120W
Backup = 1440 ÷ 120 = 12 hours

See the difference?
BLDC fans double your backup time.

 

Why BLDC Fans Are a Game-Changer with Inverter Batteries

As a battery manufacturer, we strongly recommend BLDC fans because:

• They consume 50–60% less power
   
• They reduce battery load significantly
   
• They increase backup duration almost 2X
   
• They extend battery life because the discharge rate is lower
   

If a customer uses BLDC fans, even a 150Ah battery becomes a powerhouse.

 

What Affects Actual Fan Running Time?

Here are the real-world factors customers must know:

 

1. Inverter Efficiency

A good inverter has 85–90% efficiency.
A poor-quality inverter may waste 20–25% energy.

This directly affects backup time.

 

2. Age of the Battery

A new tubular battery performs better than a:

• 2-year-old battery
   
• Overcharged battery
   
• Poorly maintained battery
   

Sulphation, low water level, and wrong charging reduce performance.

 

3. Additional appliances running

Backup reduces if you're also running:

• Lights
   
• TV
   
• Wi-Fi router
   
• Refrigerator (if inverter supports)
   

Loads add up quickly.

Even 2 tube lights (40W each) = +80W load
Backup drops immediately.

 

4. Fan speed

A fan at speed 5 consumes more power than at speed 2 or 3.

Speed variation can change load by 10–25%.

 

5. Weather

In summer:

• Fans run at full speed
   
• Battery heats up
   
• Backup reduces
   

In winter, backup increases naturally.

 

Is a 150Ah Battery Enough for a Home?

Yes, for most Indian homes, a 150Ah tubular battery is ideal.
It can comfortably run:

 3–4 Fans

 4–5 LED lights

 1 Wi-Fi router

1 TV (optional)

Backup will typically be 4–10 hours, depending on load.

 

Why Tubular Batteries Are Best for Long Fan Backup

Since you're a manufacturer, highlight these advantages:

• Deep cycle design → longer backup
   
• Low internal resistance → efficient power delivery
   
• Heat resistance → performs better in Indian summers
   
• Long life → 4–6 years easily
   
• Faster recharge technology
   
• Suitable for both home and commercial applications
   

A good tubular battery performs far better than a flat-plate battery in terms of:

• Backup
   
• Voltage stability
   
• Durability
   

 

Comparing 150Ah vs 200Ah for Running Fans

If someone wants long night backup, suggest:

Capacity	Backup with 4 fans
150Ah	~6 hours
200Ah	~8 hours
220Ah	~9 hours

A 200Ah battery gives 25–30% more backup but not double—people often misunderstand that.

Lento Industries Private limited is the Best tubular battery manufacturer for home and business - 

 

When it comes to reliable power backup, customers don’t just look for a battery—they look for trust, performance, and long-term value.
And that is exactly what our company delivers through every battery we manufacture.

As one of India’s leading tubular battery manufacturers, we combine:

• Advanced deep-cycle technology
   
• Premium-grade lead alloys
   
• High-pressure die-cast tubular plates
   
• Fast-charging, long-life design
   
• Stringent ISO-certified quality control
   
• Real-world product testing in Indian climates
   

Our range of tubular batteries is specially engineered for homes, shops, offices, villages, farms, schools, and commercial establishments needing long and stable backup.

Whether it is a single fan or an entire office load, our tubular batteries are built to deliver consistent performance even in long power cuts.

 

    Our Tubular Battery Range (With Technical Specifications)

Below is our recommended product range for home and business use, including your 150Ah model:

 

1️⃣ Home Series – Long Backup, Low Maintenance

Feature	120Ah Tubular Battery	150Ah Tubular Battery (Best Seller)	180Ah Tubular Battery
Battery Type	Tall Tubular	Tall Tubular	Tall Tubular
Rated Capacity	120Ah, 12V	150Ah, 12V	180Ah, 12V
Technology	Tubular Deep Cycle	High-Density Tubular Plates	Advanced Tubular HD
Backup Duration	3–6 hours	5–10 hours	6–12 hours
Ideal For	1–2 BHK Homes	2–3 BHK Homes, Shops	Big Homes, Offices
Warranty Options	36–48 months	42–60 months	48–60 months
Charging Time	8–10 hours	6–8 hours (Fast Charge)	8–12 hours
Recommended Load	2–3 Fans + Lights	3–5 Fans + Lights + Router	5–7 Fans + Appliances
Design	Tubular Wet Cell	Tall Tubular, Long Life	Heavy Duty Tubular
Water Top-up	Every 3–4 months	Low-maintenance	Low-maintenance
Expected Life	4–5 years	5–6+ years	6+ years
Special Feature	Affordable & Reliable	Best Performance in High Heat	High Backup for Long Cuts

 

2️⃣ Commercial Series – High Load, Long Duration Backup

Feature	200Ah Tubular Battery	220Ah Tubular Battery	250Ah Industrial Tubular
Battery Type	Tall Tubular Heavy Duty	Tall Tubular Heavy Duty	Industrial Tubular
Rated Capacity	200Ah, 12V	220Ah, 12V	250Ah, 12V
Technology	HD Tubular Plates	Extra Thick Tubular Plates	Industrial Deep Cycle
Backup Duration	6–14 hours	7–15 hours	10–20 hours
Ideal For	Offices, Shops, Clinics	Small Businesses, Schools	Hotels, Factories, Workstations
Warranty	48–60 months	54–72 months	60–75 months
Charging Time	10–12 hours	10–14 hours	12–15 hours
Recommended Load	Fans + Lights + Computers	Higher Load + Multiple Devices	Heavy Load + Long Cuts
Special Feature	High Power Supply Stability	Excellent Heat Resistance	Premium Industrial Grade

 

 

Why Our 150Ah Tubular Battery Is the Best Choice for Most Indian Homes

Our 150Ah Tall Tubular Battery is the most recommended product for a simple reason:
It gives long backup, high reliability, and low maintenance—perfect for Indian homes and power conditions.

Key Advantages:

✔ Runs 3–4 fans for 6–8 hours
✔ Designed for deep discharge cycles
✔ Performs excellently in high temperature regions
✔ Faster charging during low voltage or inverter fluctuations
✔ Tough tubular plates for 5–6+ years of life
✔ Ideal for home, shop, or small business

This model ensures that during power cuts, your home remains comfortable and functional without stress.

Faq- 

How long can a 100Ah battery run a fan?

Practical Scenarios: Estimated Battery Runtime for Everyday Uses

Application	Power Consumption	Runtime with 12V 100Ah Battery
12V Portable Fan	30 watts	40 hours
12V Refrigerator	60 watts	20 hours
Laptop Charging	90 watts	13 hours
500W Inverter (Mixed Load)	500 watts	2.4 hours

 

How many lights and fans can run on a 200Ah battery?

72V 200Ah battery can power multiple devices based on their wattage. For example, if you have 10 lights at 10W each (100W) and 2 fans at 50W each (100W), your total consumption would be 200W. This setup could run for about 72 hours (14,400Wh / 200W) under ideal conditions.

 

How many fans can run on a 120Ah battery?

Additional Information

Appliances/Electronics	No. of Appliances used at the time of power cut
LED TV 40"	1	2
LED Bulb 9W	5	5
LED Tubelight 24W	4	2
Fans	3	2

 

What is the load capacity of a 150Ah battery?

A 150Ah battery can theoretically provide 150 Amperes for one hour or 15 Amperes for 10 hours. A 220Ah battery can deliver 220 Amperes for one hour or 22 Amperes for 10 hours.

 

How many fans and lights can run on a 150Ah battery?

A 150Ah battery can generally run 3 to 4 ceiling fans, each consuming around 70 watts, for approximately 6 to 8 hours. The exact runtime will depend on the battery's efficiency, the power consumption of the fans, and the total load.

 

Which is better, 100Ah or 200Ah?

If you need high power for larger systems, a 200Ah battery is more efficient and practical, offering simpler management. However, for smaller or distributed setups, two 100Ah batteries might be the better option, providing greater flexibility.

 

What is the 80 20 rule for charging batteries?

The 80/20 rule for lithium batteries recommends: Charge up to 80% for daily use. Charge to 100% only when needed, such as before a long trip or a full discharge cycle. Avoid letting the battery discharge lower than 20%.