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%
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