Solar PV Calc - Solar Designer

Solar PV Calc is a FREE professional solar power system designer and calculator.
Used by homeowners, solar installers, and engineers to size complete off-grid and
backup solar systems using real engineering formulas.

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⚡ WHAT YOU CAN CALCULATE
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✓ Solar panel array size (Wp) from daily energy needs
✓ MPPT charge controller amperage (sized by array, not load)
✓ Pure sine wave inverter sizing with 25% safety margin
✓ Battery bank capacity (Ah) at 50% depth of discharge
✓ DC & AC circuit breaker ratings
✓ PV string fuses and surge protection devices (SPD)
✓ Complete safety equipment list

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🔧 KEY FEATURES
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✓ Add household appliances with wattage, voltage & daily hours
✓ 12V / 24V / 48V DC system support
✓ Automatic current calculation (I = W/V)
✓ Professional wiring diagrams
✓ Complete materials shopping list with quantities
✓ Step-by-step installation guide
✓ Financial ROI calculator — payback period & 25-year savings
✓ Cable sizing & panel angle calculator (Advanced Tools)
✓ Calculation history — save and compare multiple system designs
✓ Environmental impact — CO₂ saved and trees equivalent
✓ 100% offline — works without internet connection
✓ All data saved locally — no account required

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📐 REAL ENGINEERING FORMULAS
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• Daily Energy (kWh) = Σ(Watts × Hours) / 1000
• Solar Array (Wp) = Daily kWh / (Peak Sun Hours × 0.75)
• Inverter (W) = Total Load × 1.25
• MPPT Controller (A) = Array Wp / Battery V × 1.25
• Battery Bank (Ah) = Daily Wh / (System V × 0.50)

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🌏 DESIGNED FOR THE PHILIPPINES
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• 5 peak sun hours (Philippine average)
• 230V AC, 50Hz standard output
• 550Wp monocrystalline panel sizing
• MPPT models available in the Philippine market

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⭐ PRO VERSION (OPTIONAL)
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Go PRO with a single one-time purchase to enjoy a completely
ad-free experience. All features remain free — PRO only removes ads.

Built by DarskeeWorks — solar engineering meets mobile technology.

Note: This app provides educational estimates for planning purposes.
Always consult a certified solar installer before any actual installation.