Free Solar Calculators
Design smarter solar systems with our technical calculators for panels, batteries, inverters, tilt angles, wiring, and hybrid PV setups.
🛠️ Solar Project
- Solar Greenhouse Ventilation Fan Sizing System
- Solar Irrigation Pump Sizing Calculator
- Solar Drip Irrigation Controller & Pump Sizing Guide
- Solar Aquaculture Aeration System
- Solar Electric Fence System
- Solar Poultry Farm Lighting System
- Solar Home Lighting System
- Solar Water Pump System for Home Wells
🟢 Solar Panels
- Solar panel output by wattage
- Solar panel output by location
- Solar panel tilt angle by latitude
- Optimal tilt vs seasonal tilt calculator
- Solar panel orientation (azimuth) efficiency loss
- Solar panel daily kWh output by panel rating
- Solar panel output with temperature coefficient
- Solar Panel Degradation Over Time
- Solar Panel Fixed Tilt vs Tracking Output Calculator
- Roof Area to Panel Capacity Calculator
- Solar Panel Ground Mount vs Rooftop Efficiency Comparison
- Optimal Spacing Between Solar Panels
- Solar Panel Cloud Coverage Loss Calculator
- Solar Panel Monocrystalline vs Polycrystalline Output Comparison
🔋 Batteries
- Battery runtime calculator (Ah, V, load W)
- Battery capacity needed for X hours runtime
- Number of batteries needed for X load
- Series vs parallel battery configuration calculator
- Depth of discharge runtime calculator
- Battery lifespan (cycles vs DoD) estimator
- Lead-acid vs lithium runtime comparison
- Battery efficiency loss calculator
- Battery degradation over years calculator
- Battery bank sizing by kWh/day usage
- Solar panel charging time for battery
- Battery charging current requirement calculator
- Battery autonomy calculator (days without sun)
- Battery round-trip efficiency calculator
- Off-grid battery bank sizing calculator
- Maximum Solar Charge Controller Size Calculator
⚡ Inverters
- Inverter size needed for X load
- Inverter vs panel wattage compatibility checker
- Solar inverter surge power calculator
- Pure sine vs modified sine inverter compatibility
- Inverter efficiency loss calculator
- Inverter DC input voltage calculator
- Inverter parallel operation calculator
- Off-grid inverter sizing calculator
- Grid-tied inverter sizing calculator
- Hybrid inverter capacity calculator
- Inverter to battery matching calculator
- Inverter oversizing vs undersizing calculator
🔌 Wiring & Safety
📐 Performance & Lifetime
- Panel degradation loss per year calculator
- Battery cycle degradation per DoD calculator
- Solar panel hotspot risk calculator
- Shading impact by coverage percentage
- Dust and soiling loss estimator
- Solar temperature coefficient loss calculator
- Battery lifetime cost per kWh calculator
- Inverter replacement interval calculator
🌍 Location & Climate
🧩 System Builder Hub
- Solar vs Grid Cost Decision Calculator
- Step 1: Daily load requirement calculator
- Step 2: Panel sizing calculator
- Step 3: Battery sizing calculator
- Step 4: Inverter sizing calculator
- Step 5: Charge controller size calculator
- Full off-grid system sizing calculator
- Hybrid solar system builder calculator