☀️ Renewable Energy
Solar System Size Calculator
Calculate solar panel capacity, number of panels, battery storage, and system cost.
Average Daily Consumption
kWh
Average daily electricity usage in kWh
Location / Sun Hours
Average peak sun hours per day in your location
Panel Wattage
W
Wattage of each solar panel
Battery Backup Days
days
Number of days of battery backup needed
System Losses
%
Inverter, wiring, and other system losses
System
0%
System Size
0 kW
total capacity
Panels Required
0
Battery Capacity
0 kWh
Annual Production
0 kWh
Estimated Cost
$0
📐 Solar System Formulas
System Size = Daily Usage ÷ Sun Hours
kW capacity needed
Panels = System Size ÷ Panel Wattage
Number of panels
Battery = Daily Usage × Backup Days
Battery capacity (kWh)
Annual = System Size × Sun Hours × 365
Annual production (kWh)
📊 System Breakdown
| Component | Value | Details |
|---|
How the formula works
System Size = (Daily Usage ÷ Sun Hours) × (1 + Losses%) | Panels = System Size ÷ Panel Wattage
- System Size = Required solar capacity in kW
- Sun Hours = Average peak sun hours per day in your location
- Panels = Number of solar panels needed
- Battery Capacity = Daily Usage × Backup Days
- Annual Production = System Size × Sun Hours × 365
- Estimated Cost = System Size × $2,500 per kW (average)