Complete Home Power Backup Planner
Estimate an inverter and battery setup from your appliance load and chosen backup duration. Frequency and duration are planning inputs, not live outage measurements.
Example defaults are editable. They are not a prediction or a measurement of your area's supply.
1600VA / 24V Pure Sine Wave (Luminous Zelio+ / Microtek Luxe / Exide)
2x 200Ah Tall Tubular (Heavy Duty C10) (Exide Inva Tubular / Luminous Red Charge / Amaron)
- Ceiling Fan (Standard) (x4)
- LED Bulb (9W - 12W) (x6)
- LED Batten / Tube Light (x4)
- Refrigerator (Double Door / Frost Free) (x1)
- Wi-Fi Router + Fiber ONT (x1)
- Smart LED TV (43" - 55") (x1)
- Laptop Charger (Workstation) (x2)
- RO Water Purifier (x1)
No high-surge heavy appliances configured in this preset.
• Switching standard 75W ceiling fans to 28W BLDC fans will instantly extend your backup runtime by 15% without buying a bigger battery.
• Place the inverter battery on a non-conductive plastic trolley with at least 6 inches gap from walls for cooling during Indian summer.
• Always keep high-surge motors (water pump, geyser, 1.5T AC) off the inverter backup circuit to avoid tripping the overload protector.
Frequently Asked Questions
Related calculators
Continue with another electricity or backup-planning tool.
Reference official efficiency and safety guidance from Bureau of Energy Efficiency and standards information from Bureau of Indian Standards.
Calculation Assumptions & Safety
Calculations are planning estimates using the displayed inputs and assumptions, not certified designs or verified provider bills. Actual runtime, generation, cost and wire requirements vary with equipment, installation and operating conditions. Confirm manufacturer specifications and current provider rules. Have a qualified electrician review wiring and backup installations.
Plan backup from appliances to inverter and battery
For a 250 W essential load over four hours, delivered energy is 1,000 Wh. If battery-to-load efficiency is 85%, at least 1,176 Wh of usable battery energy is required before other design allowances.
How the calculation works
Required load energy (Wh) = watts × desired hours; required battery energy accounts for conversion losses, discharge limits and battery chemistry.
Compare household scenarios
- 250 W × 2 h: 500 Wh delivered
- 250 W × 4 h: 1,000 Wh delivered
Common questions
- Should I choose inverter VA or battery Ah first?
- Estimate simultaneous load watts and desired runtime first. Inverter rating addresses power delivery; usable battery energy addresses duration.