Solar Power System Design & Pricing Calculator
Standard
IEC
NEC
GB
Application
*
Residential grid-tie (3–20 kW)
Residential off-grid (3–20 kW)
C&I grid-tie (20–500 kW)
C&I storage + PV (20–1000 kW)
System AC capacity (kW)
*
Daily energy / backup (kWh)
Module power (Wp)
550 Wp
600 Wp
700 Wp
Peak sun hours (kWh/m²/day)
Search city / place
Search a place or click the map — fills latitude and solar resource automatically.
Site latitude (°)
Grid tariff ($/kWh)
Backup days
Storage duration (h)
Grid voltage
380 V (LV)
10 kV (MV)
Installation (% of equipment)
Probability basis
P50
P75
P90
P50 = median year; P75/P90 are bankable exceedance levels from interannual solar variability.
Advanced parameters
Defaults match the standard design baseline — adjust for site-specific conditions.
DC cable length (m)
DC cable start section (mm²)
4
6
10
16
Module length (mm)
Module width (mm)
Min design temperature (°C)
Max design temperature (°C)
Battery C-rate limit (0.5–1.0)
Estimate CO₂ savings
No
Yes (grid factor 0.6 tCO₂/MWh)
Discount rate (WACC)
O&M cost ($/kW/yr)
EPC / soft cost (%)
Project lifetime (yr)
Inverter replacement year
Inverter replacement ($/W)
Module degradation (/yr)
Calculate Design
Complete Design
Enter parameters to see the full design.
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