Solar Savings Calculator
Calculate monthly and yearly savings from your solar energy system
System Configuration
Total installed solar panel capacity in kilowatts
Current electricity tariff rate per kWh unit
System: 5 kW | Rate: ₹8/unit
Generation: 20 kWh/day | 600 kWh/month
System Parameters
Average daily peak sun hours at your location
Overall system efficiency including inverter losses
Parameters: 5h sun, 80% efficiency
Daily capacity: 25 kWh theoretical
Usage & Export
Percentage of generated power used at home
Rate paid by utility for excess power exported
Usage: 70% self, 30% export
Self: 420 kWh | Export: 180 kWh/month
Generation Summary
Monthly Generation
600 kWh
20 kWh per day
Self Consumed
420 kWh
Exported
180 kWh
Monthly Savings
Total Monthly Savings
₹3,900
₹46,800 per year
Bill Reduction
₹3,360
Export Income
₹540
Long-term Savings
25-Year Savings
₹22,33,629
With 5% annual rate increase
Yearly Growth
5.0%
Total Generation
182.5k kWh
Generation Breakdown
Monthly generation: 600 kWh at 80% efficiency
Quick Summary
System Size:5 kW
Daily Generation:20 kWh
Monthly Savings:₹3,900
Yearly Savings:₹46,800
Self Consumption:70%
25-Year Total:₹22,33,629
Detailed Breakdown
How Solar Savings Calculation Works
Generation Calculation
Daily generation = System size × Peak sun hours × Efficiency = 5 kW × 5 hrs × 80% = 20 kWh
Monthly: 600 kWh | Yearly: 7,300 kWh
Usage & Export Split
Self consumption: 420 kWh (70%) | Export: 180 kWh (30%)
Bill reduction: ₹3,360 | Export income: ₹540
Savings Calculation
Monthly savings = (Self consumed × Rate) + (Exported × Export rate) = ₹3,360 + ₹540 = ₹3,900
25-year savings with 5% annual rate increase: ₹22,33,629
Key Factors
System efficiency includes inverter losses and other factors. Self consumption depends on usage patterns and load timing.
Export rate: ₹3/unit | Import rate: ₹8/unit | Efficiency: 80%
Solar Savings Optimization
Maximize Self Consumption:
- • Load Shifting: Use appliances during day hours
- • Battery Storage: Store excess for evening use
- • Smart Timing: Schedule washing machine, dishwasher
- • EV Charging: Charge electric vehicles during day
System Optimization:
- • Panel Orientation: South-facing for maximum sun
- • Tilt Angle: Optimize for your latitude
- • Shading: Minimize shadows on panels
- • Maintenance: Clean panels regularly
Your 5 kW System Potential:
Generation: 600 kWh/month
Savings: ₹3,900/month
Self Use: 420 kWh (70%)
Export: 180 kWh (30%)
Bill Reduction: ₹3,360
Export Income: ₹540
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Accurate calculations for your solar energy journey