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Solar Cell Size Calculator

Automatically calculate required solar panels, battery, and inverter size based on electric bill.

100% Client-Side (Data never leaves your device)

Engineering Parameters

Solar System Type

Average Monthly Bill (THB)3,500 ฿

Rate (THB/kWh)4.5 ฿

Peak Sun Hours4.5 hr

Day vs Night Usage Ratio60% / 40%

☀️ Day🌙 Night

Panel Wattage (W)550 W

Efficiency80%

Recommended Solar Array

ONGRID SYSTEM

Installed Capacity

4.40 kWp

Total Panels

8 Pcs

(550W / แผง)

Roof Space Req.

20.0 ตร.ม.

(~2.5 ตร.ม. / แผง)

Recommended Inverter Capacity

5.28 kW

⚡ 20% Overclock Allowance Included

Battery Storage Capacity

0.00 kWh

No battery required for On-Grid

Financial & ROI Analysis

Est. Installation Cost

110,000 ฿

*Includes parts & labor

Est. Annual Savings

+25,200 ฿

~2,100 ฿ / mo

Est. Payback Period

4.4 Years

🚀 Excellent Investment

CO2 Emission Reduction

Clean energy saves 2,890.8 kg CO2/yr, equivalent to planting:

289Trees/yr

💡 Calculations represent energy engineering standards. Actual pricing depends on installer and equipment brands.

How to Use Solar Cell Size Calculator

Enter your average monthly electricity bill (THB).
Specify peak sun hours per day (4.5 to 5 hours recommended for Thailand).
The system calculates the recommended solar array (kW) and inverter size.
It also estimates required battery storage for night backup.

⭐ ให้คะแนนเครื่องมือนี้

4.7

/ 5.0

รีวิว

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💡 Need more features?

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