Inverter Size Calculator

Calculate optimal inverter capacity based on your appliance load requirements

Appliances & Load

50W
225W
150W
200W
500W
1500W
Total Connected Load: 2,625 watts
Simultaneous Load: 625 watts

Inverter Configuration

Extra capacity to handle startup surges and future loads
Config: Pure-sine, 25% margin
Recommended size: 782 watts (0.98 KVA)

Inverter Requirements

Recommended Size
782 watts
KVA Rating
0.98 KVA
Efficiency
95%
Pure-sine inverter

Load Analysis

Total Connected
2,625 W
Simultaneous Load
625 W
Load Factor
23.81%
Percentage of appliances running simultaneously

Cost & Specifications

Estimated Inverter Cost
11,730
₹15/watt
Power Factor
0.8
Wave Type
pure sine

Appliance Status

✅ Simultaneous Use

LED Light: 50W
Fan: 225W
TV: 150W
Refrigerator: 200W

⏱️ Occasional Use

Washing Machine: 500W
Air Conditioner: 1500W

Quick Summary

Total Appliances:6
Connected Load:2,625 W
Simultaneous Load:625 W
Safety Margin:25%
Inverter Size:782 W
Total Cost:11,730

Load Distribution

Load breakdown and inverter sizing analysis

How Inverter Size Calculation Works

Load Calculation

Total connected load: Sum of all appliance loads = 2,625W

Simultaneous load: Only appliances marked for simultaneous use = 625W

LED Light: 10W × 5 = 50W
Fan: 75W × 3 = 225W
TV: 150W × 1 = 150W
Refrigerator: 200W × 1 = 200W

Safety Margin & Sizing

Inverter size = Simultaneous load + Safety margin = 625W + 25% = 782W

KVA rating = Watts ÷ (Power factor × 1000) = 782W ÷ (0.8 × 1000) = 0.98 KVA

Cost & Efficiency

Pure-sine inverter cost: 782W × ₹15/W = ₹11,730

Efficiency: 95% | Pure sine wave offers better efficiency and appliance compatibility

Load Factor Analysis

Load factor = Simultaneous load ÷ Total connected load = 625W ÷ 2,625W = 23.81%

Lower load factor means more efficient inverter sizing - not all appliances run simultaneously

Pro Tips for Inverter Selection

Inverter Type Selection:

  • Pure Sine Wave: Better for sensitive electronics
  • Modified Sine: Lower cost, basic appliances only
  • Safety Margin: 25-30% recommended for future loads
  • • Consider starting surge of motors (2-3x rated power)

Load Management:

  • • Mark high-power appliances as non-simultaneous
  • • Use timers to prevent simultaneous operation
  • • Consider load shedding for critical applications
  • • Plan for seasonal load variations

Your System Recommendation:

Connected: 2,625W
Simultaneous: 625W
Inverter: 782W
Cost: ₹11,730
Type: Pure-sine
Efficiency: 95%