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Solar cable size and voltage drop calculator
DC wire thickness, voltage drop percentage and breaker rating.
Your solar report
2.2 kW system
Your solar report
2.2 kW system
10 kWh/day · 5.6 peak sun hours in Ghazni City
- Recommended system size
- 2.2 kW
- Panels
- 4 × 585 W
- Roof area required
- ≈ 10 m²
- Hybrid inverter
- 3 kW
- Battery bank
- 1 × 5.12 kWh LiFePO4 (2.92 kWh needed)
- DC cable
- 25 mm² · 1.34% drop
- Charge controller / DC breaker
- 58 A · 60 A
- Orientation
- True South · 29° tilt
- Estimated yearly output
- 3,597 kWh
- Estimated savings
- AFN 3,597/mo · AFN 43,164/yr
- CO₂ avoided
- 1,619 kg/yr ≈ 77 trees
Estimates use standard engineering formulas with 20% system losses and 15% inverter headroom. A free site survey confirms the final design.
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