Solar Panel Calculator | Calctra

☀️ Solar Panel Calculator | Calctra

Free online Solar Panel Calculator with formula and examples. Easily estimate required solar system size, number of panels, inverter capacity, and approximate installation cost.

Monthly Electricity Bill (₹) Electricity Rate (₹/kWh) Panel Capacity (Watt) Sunlight Hours / Day

📌 What is Solar Panel Calculator?

A Solar Panel Calculator helps you determine how much solar capacity you need for your home, office, or industry based on your monthly electricity consumption.

Home owners
Businesses
Industries
Commercial buildings
Solar installers

🧮 Formula Used

Monthly Units = Monthly Bill ÷ Unit Rate

Daily Units = Monthly Units ÷ 30

System Size = Daily Units ÷ Sunlight Hours

Panels = (System × 1000) ÷ Panel Wattage

Inverter ≈ System + 0.5

Cost = System × ₹50,000

✍️ Example

Monthly Bill = ₹3000
Unit Rate = ₹7
Sunlight = 5 Hours
Panel = 400W

System Size = 2.86 kW
Panels = 8
Cost ≈ ₹1,43,000

❓ FAQ

Is this calculator accurate?

It gives approximate results. Actual values may vary.

Ideal sunlight in India?

4–6 hours per day.

Can AC run on solar?

Yes, with proper system size.

Does it include subsidy?

No. Depends on state policy.

📈 Benefits

Saves time and money
Easy to use
No registration
Mobile friendly
100% Free