How many batteries do I need for a 1.5 ton AC for 4 hours in Pakistan?

A 1.5 ton inverter AC averages 1800 W. Over 4 hours that is 7.2 kWh of usable energy. Account for battery DOD (depth of discharge): on Lithium (95% DOD), total battery needed is 7.6 kWh, roughly Rs 7 to 8 lakh installed for Pakistani Lithium brands. On Tubular (60% DOD), total battery needed is 12 kWh, roughly Rs 5 lakh installed in 4 to 6 large 200 Ah tubular cells, but you replace them every 4 to 5 years. Most Pakistani homes pick smaller backup (lights + fans + 1 AC for 2 hours = 3 to 4 kWh battery) to keep cost down.

Lithium vs Tubular battery in Pakistan, which is better in 2026?

Lithium LiFePO4 is 2 to 2.5x more expensive upfront (Rs 90 to 95k per usable kWh vs Rs 40 to 42k for Tubular), but lasts 4 to 5x longer (6000 cycles = 15 to 20 years vs 1500 cycles = 4 to 5 years for Tubular) and uses 95% of its capacity vs 60% for Tubular. On a 10 year total cost of ownership basis, Lithium ends up cheaper for most households. Tubular still wins if you cannot afford the upfront cost and plan to replace cells.

What is DOD (Depth of Discharge) and why does it matter?

DOD is the percentage of the battery you can actually use without damaging it. Lithium LiFePO4: 95% DOD, so a 5 kWh battery gives 4.75 kWh usable. Tubular: 60% DOD, so a 5 kWh battery gives only 3 kWh usable. Lead Acid (flat): 50% DOD. If you discharge a Tubular below 60% regularly, cycle life drops from 1500 to 500 cycles fast. Our calculator factors DOD into the recommended capacity automatically.

Why is 48 V the standard for residential solar in Pakistan?

Higher voltage means lower current for the same power. A 5 kW load at 12 V draws 416 A; at 48 V it draws 104 A. Lower current means thinner cables, less heat loss, smaller fuses, and modern hybrid inverters (Inverex Nitrox, Solis, Knox, MaxPower) are designed around 48 V battery banks. 12 V is fine for small portable or RV systems; 24 V for systems under 2 kW. Anything 3 kW or above, go 48 V.

Which Pakistani lithium battery brand is best?

Pylontech (Chinese, premium global), Volta Lithium (Pakistani branded), Osaka Lithium, Narada (Chinese mid market), Inverex Lithium and Soltaro are all sold in Pakistan as of 2026. Top tier price: ~Rs 95k per usable kWh. Look for built in BMS (Battery Management System) protection, IEC 62619 / UL 1973 certification, and a minimum 5 year warranty. Avoid no name lithium imports because BMS quality is the difference between 6000 and 1500 actual cycles.

How long does a tubular battery last in Pakistan?

Genuine tubular cells (Phoenix TX, AGS SP, Volta Tall Tubular, Osaka Platinum, Exide Tubular) at 60% DOD with monthly water top up: 1500 to 1800 cycles, roughly 4 to 5 years of daily solar cycling. Going deeper than 60% DOD drops life to 500 to 800 cycles. Hot Pakistani summers also reduce life by 10 to 20% versus rated. Plan for replacement at year 4 to 5.

Can I use my UPS battery for solar backup?

Technically yes, but it is a bad idea. Regular UPS flat lead acid batteries are designed for occasional brief discharges (a few minutes during a grid blip), not daily 4 to 8 hour solar cycling. Cycle life drops from 500 cycles to 150 to 200 cycles in this use. Always buy deep cycle tubular or lithium for daily solar backup. The Rs 20,000 saved upfront becomes Rs 40,000 in replacements within 18 months.

How much does a 10 kWh lithium battery cost in Pakistan?

Approximate Q2 2026: Rs 9 to 11 lakh installed for tier 1 brands (Pylontech, Inverex Lithium, Volta Lithium high tier). Includes the battery module, BMS, mounting bracket, cables to inverter, installation labour. Cheaper Chinese tier 2 lithium can go down to Rs 7 lakh but compromise on BMS quality and warranty. Always confirm the warranty in writing, demand at least 5 years.

Solar Battery Backup Calculator Pakistan

Pick appliances (fans, lights, AC, fridge) and get the right battery Ah, kWh and cost for Lithium, Tubular or Lead Acid backup in Pakistan.

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About the Solar Battery Backup Calculator Pakistan

Free Pakistani solar battery backup sizing calculator built around how Pakistani users actually think: just pick the appliances (4 ceiling fans, 8 LED bulbs, 1 inverter AC 1.5 ton, 1 fridge, 1 WiFi router) and the hours of backup you need, no need to know wattage. We do the math behind the scenes using realistic Pakistani averages (1.5 ton inverter AC = 1800 W, ceiling fan = 75 W, fridge running avg = 150 W, water motor 1 HP = 750 W). Compare Lithium LiFePO4 (Pylontech, Volta, Osaka, Narada, Inverex) vs Tubular (Phoenix TX, AGS SP, Volta) vs flat Lead Acid on capacity (Ah at 12V / 24V / 48V), kWh, approximate installed cost, and 10 year total cost of ownership. Solves the most common Pakistani solar question, will my battery actually run my AC during load shedding.

How this works: tell us which appliances you want to back up during load shedding (or a full grid outage), how many hours of backup you need, and we will tell you the battery capacity (Ah + kWh) and approximate cost for Pakistani brands. No need to know wattage. We use realistic Pakistani averages (1.5 ton inverter AC = 1800 W, ceiling fan = 75 W, fridge = 150 W average running).

Lighting

LED bulb 9 W

9 W each

LED bulb 12 W

12 W each

LED bulb 18 W

18 W each

Tubelight 40 W

40 W each

Energy saver 25 W

25 W each

Fans

Ceiling fan

75 W each

Pedestal fan

60 W each

Exhaust fan

45 W each

Cooling (AC + cooler)

Inverter AC 1 ton

1200 W each

Inverter AC 1.5 ton

1800 W each

Inverter AC 2 ton

2400 W each

Air cooler

180 W each

Kitchen

Refrigerator (avg running)

150 W each

Deep freezer (avg running)

250 W each

Microwave oven

1100 W each

Electric kettle

1500 W each

Blender / juicer

400 W each

Laundry

Washing machine

500 W each

Iron

1000 W each

Geyser (electric)

2000 W each

Water motor / pump

Water motor 0.5 HP

375 W each

Water motor 1 HP

750 W each

Water motor 2 HP

1500 W each

Submersible pump 1 HP

750 W each

Electronics

LED TV 32 inch

60 W each

LED TV 43 inch

90 W each

LED TV 55 inch

120 W each

Laptop

65 W each

Desktop computer

200 W each

WiFi router

15 W each

Phone charger

18 W each

Other appliance wattage (optional)

Anything not in the list above (workshop tools, gym treadmill, etc.), enter total watts.

Backup hours required

How long should the battery last on a single charge (typical: 4 hours for evening load shedding, 6 to 8 hours for full night).

Battery type

Best lifecycle cost, lightweight, BMS protected, no maintenance, fits wall-mounted modular form factor.

System voltage

Battery sizing for 12 appliances (552 W total load, 4 hour backup)

Usable energy needed

2.21 kWh

Battery capacity (incl. 95% DOD)

2.32 kWh

Ah at 48 V

48 Ah

Approx. cost (installed)

Rs 220,800

Lithium LiFePO4, top brands in Pakistan:

Pylontech, Volta Lithium, Osaka Lithium, Narada, Inverex Lithium, Soltaro

10 year ownership cost (approximate)

6000 cycles ≈ 16.4 years per battery set. Roughly 1 replacement set over 10 years ≈ Rs 220,800 lifetime cost for this configuration.

Reality check: heavy loads (AC, water motor, geyser, microwave) drain a battery fast. For 4+ hour AC backup on a typical 1.5 ton inverter AC plus 4 fans plus 8 LED bulbs, plan on roughly 10 to 15 kWh of lithium battery (around Rs 10 to 14 lakh installed). If your goal is just fans + lights + TV during 4 hour load shedding, 2 to 3 kWh of lithium (around Rs 2 to 3 lakh) is plenty.

Lithium vs Tubular: lithium is ~2.5x more expensive upfront but lasts 4 to 5x longer and uses 95% of its rated capacity (vs 60% for tubular). On a 10 year horizon, lithium TCO ends up lower for most households. Read our blog "Best Solar Battery Pakistan 2026" for the full comparison.

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How to use the Solar Battery Backup Calculator Pakistan

Pick the appliances you want backed up: tap the plus button on fans, lights, fridge, AC, water motor and other items you actually want running on battery.
Set backup hours: how long should the battery last on one full charge (typical: 4 hours for evening load shedding, 6 to 8 hours for full night).
Pick battery type: Lithium LiFePO4 (best lifetime cost, 6000 cycles), Tubular (cheapest upfront, 1500 cycles, water maintenance), or flat Lead Acid (not recommended for daily solar use).
Pick system voltage: 12 V for tiny systems, 24 V for mid range, 48 V for 3 kW+ residential solar (default).
Read off: required battery Ah at your chosen voltage, total kWh, approximate installed cost in PKR, recommended Pakistani brands, and 10 year ownership cost comparison.

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Solar Battery Backup Calculator Pakistan

About the Solar Battery Backup Calculator Pakistan

How to use the Solar Battery Backup Calculator Pakistan

Frequently Asked Questions

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