Solar Refrigerator Calculator
Size the solar system needed to keep a refrigerator running 24/7.
About the Solar Refrigerator Calculator
The Solar Refrigerator Calculator gives you a clear, instant answer to a question that usually means digging through tables or guessing — enter your numbers and read the result straight away.
Not every appliance should run on solar — high-wattage, long-running loads drain batteries quickly. This Solar Refrigerator 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.
The Solar Refrigerator Calculator is one of a large, connected suite of Pakistani calculators on GuruAlpha, so if a related figure comes up next, the tool for it is a click away.
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 does a fridge need?
A 200 W fridge runs ~35% of the time — about 1.7 kWh/day, so a 0.5–0.8 kW system with battery keeps it running.
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.