Solar PV Calc - Solar Designer

DarskeeWorks

In-app purchases

About this app

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.

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚡ WHAT YOU CAN CALCULATE
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✓ 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

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔧 KEY FEATURES
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✓ 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

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📐 REAL ENGINEERING FORMULAS
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
• 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)

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

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⭐ PRO VERSION (OPTIONAL)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
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.

What’s new

• NEW: Android-native bottom navigation bar — switch tabs instantly
• NEW: 12 quick-add preset appliances (fan, fridge, AC, TV and more)
• NEW: Solar PV Calc Pro — optional one-time upgrade to remove all ads
• IMPROVED: Faster app startup and smoother animations
• IMPROVED: Better touch targets and tap feedback for Android
• IMPROVED: Preset appliances fill in automatically — no manual entry
• UPDATED: App renamed "Solar PV Calc" for easier search & discovery