Find Out How Many PV Panels You Really Need
Wondering how many solar panels you need for your home or office? This free tool calculates your total energy usage and recommends the exact number of PV panels, inverter size in kW, and battery requirements. Just enter your appliance wattage and usage hours — and let the tool do the rest!
Perfect for home users, electricians, and solar installers. It also gives recommendations on breaker sizes, wire gauges, and battery safety — including series vs. parallel setups. Plan your off-grid or hybrid solar system in minutes.
How Many Solar Panels Do I Need? (Full PV Load Calculator)
| Appliance | Qty | Avg. Watt Usage | Avg. Usage Hours | Total Watt (W) |
|---|
Electric Load Details & System Power
Total Load in Amps: 0 A
Total Load in kWh: 0 kWh
Solar Panels & Inverter Required
Number of Panels Required: 0
Recommended Solar Inverter Size: 0 kW
Additional Electrical Guidance
- Breaker Capacity: Main breaker should be rated at least 25–30% higher than total amp load. For example, 100A load = 125A or 150A breaker.
- Wiring: Use appropriate copper wire based on amps:
- Up to 20A → 2.5mm²
- Up to 32A → 4mm²
- Up to 50A → 6mm²
- 100A+ → 10mm² or higher
- Fuse Rating: Match fuse rating slightly above actual amp draw to protect appliances.
- Surge Protection: Consider SPD (Surge Protection Device) for safety against grid surges.
- Earthing: Ensure proper grounding for inverter and solar panel system to avoid electrical faults and improve safety.
Solar Load Calculator – Size Your Complete Solar System Easily
This all-in-one Solar Load Calculator helps you accurately size your solar power system based on your daily energy usage. With a clean and interactive interface, this tool enables users to calculate:
Total load in watts, amps, and kWh
Recommended solar inverter size (in kW)
Number of solar panels based on wattage
Battery bank sizing using voltage and amp-hour input
Breaker and fuse rating
Appropriate wire gauge based on amp draw
It also includes real-time inputs for quantity, wattage, and hours of each appliance – perfect for users designing solar systems for homes, offices, or off-grid setups. Whether you’re a homeowner, solar installer, or student, this tool ensures your solar setup is efficient, safe, and technically accurate.
✅ Includes automatic recommendations, safety measures, and visual guidance for series/parallel battery setups.
✅ Ideal Use Cases:
Residential solar system planning
Commercial solar power estimations
Off-grid energy design
Educational training on solar setup
Quick inverter and battery size lookup