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IPS Backup Calculator

Size your IPS inverter and battery for backup power

Select Appliances to Back Up

Choose the appliances you want to keep running during a power cut, then set how many hours of backup you need.

Ceiling Fan
W
LED Light Bulb
W
Refrigerator
W
Deep Freezer
W
Air Conditioner
W
Desktop Computer
W
Laptop
W
Home WiFi Router
W
Mobile Charger
W
LED TV
W
Washing Machine
W
Water Pump
W
Security Camera (per cam)
W
Microwave Oven
W
Electric Iron
W
Exhaust Fan
W

Frequently Asked Questions

How does the IPS calculator size my inverter and battery?
It adds up the wattage of the appliances you want to run during an outage to get your peak load, then sizes the inverter to that load (converted to kVA using a power factor, plus a 25% headroom). The battery bank is sized to run that load for your chosen number of backup hours, accounting for the battery's usable depth of discharge and inverter efficiency.
What backup time should I choose?
Pick the longest power cut you want to cover on a single charge. In most areas 3โ€“5 hours is typical; choose more if outages in your area are longer. Longer backup needs a bigger (or additional) battery.
Why is the inverter rated in kVA, not watts?
Inverters and IPS units are rated in kVA (apparent power). We convert your appliance load in watts to kVA using a power factor (0.8 by default) and add a safety margin, so the recommended inverter comfortably handles your load.
How accurate is the estimate?
It is an indicative sizing estimate based on standard formulas. For an exact IPS design and quote tailored to your appliances and budget, use the "Request a Quote" button.


Select the appliances you want to run during a power cut and your desired backup time to get a recommended IPS (inverter + battery) system.
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