Solar AC Calculator
Find the solar system needed to run an air conditioner in Pakistan.
About the Solar AC Calculator
Built for Pakistani users, the Solar AC Calculator turns a fiddly manual calculation into a one-glance result you can trust for planning and everyday decisions.
Not every appliance should run on solar — high-wattage, long-running loads drain batteries quickly. This Solar AC Calculator estimates how long your solar battery can run a specific appliance, so you plan your power priorities during outages and at night.
The calculation divides the battery's usable capacity by the appliance's consumption to give runtime, accounting for the depth-of-discharge limit of the battery type.
The order of priority for most Pakistani homes: fans and lights first, then the fridge (intermittent), then TV and internet, with heavy loads like ACs and heaters only on large systems. This calculator quantifies what each choice costs in battery.
Run the tool for each appliance you plan to power — the numbers will show you quickly why a small battery struggles with an AC but handles fans and lights for many hours.
Bookmark the Solar AC Calculator for the next time you need it, and explore the rest of GuruAlpha's 1,200+ calculators for related everyday maths.
How to estimate solar runtime for an appliance
- 1
Enter the appliance's wattage.
- 2
Enter your battery capacity and system voltage.
- 3
Read the runtime in hours, updated live.
Frequently Asked Questions
How much solar do I need to run an AC?
A 1.5-ton inverter AC draws ~1.5 kW. Running it 8 hours needs about 15 kWh/day — a 4 kW system in Lahore.
How long can a solar battery run a fan?
A 70 W fan on a 200 Ah, 12 V battery (2.4 kWh, usable ~1.2 kWh at 50% discharge) runs roughly 15–17 hours. An AC, by contrast, would drain the same battery in under an hour.