How to Choose the Right Solar Cell System Size for Your Home to Save Electricity Costs Efficiently

With rising electricity tariffs, many homeowners are turning to solar energy systems to lower their monthly expenses. However, a common question is: What system size (kWp) should I install? Selecting the right capacity ensures your system meets daily consumption needs while delivering maximum return on investment. Here is a comprehensive guide to sizing your solar system, comparing On-Grid and Hybrid setups for sustainable savings.

Comparing Solar Cell System Sizes and Monthly Savings

• 5.20 kWp System: Reduces electricity costs by 2,400 – 3,000 THB/month (Saves 36,000 THB/year)
  
• 5.85 kWp System: Reduces electricity costs by 2,900 – 3,600 THB/month (Saves 43,200 THB/year)
  
• 8.45 kWp System: Reduces electricity costs by 3,900 – 4,800 THB/month (Saves 57,600 THB/year)
  
• 10.4 kWp System: Reduces electricity costs by 4,800 – 6,000 THB/month (Saves 72,000 THB/year)
  
• 15.6 kWp System: Reduces electricity costs by 7,700 – 9,600 THB/month (Saves 115,200 THB/year)
  
• 18.2 kWp System: Reduces electricity costs by 8,600 – 10,800 THB/month (Saves 129,600 THB/year)
• 20.8 kWp System: Reduces electricity costs by 10,100 – 12,600 THB/month (Saves 151,200 THB/year)

(Note: Figures are estimated values and not guaranteed savings. Actual results depend on consumption patterns, operating hours, roof conditions, and system design.)

Which System Size Fits Your Property?

To help select the ideal capacity based on electricity consumption

• 5.20 – 5.85 kWp (Moderate Consumption): Ideal for standard residential homes with basic air conditioning and standard appliances.
• 8.45 – 10.4 kWp (High Consumption): Ideal for homes operating multiple air conditioners and heavy electrical loads.
• 15.6 – 20.8 kWp (Very High Load): Ideal for large residences, home offices, commercial spaces, or warehouses.

Choosing Between ON-GRID and HYBRID Systems

In addition to system capacity, you can choose an operational mode that matches your energy demands

ON-GRID System : Combines solar power with the public utility grid. Best suited for daytime electricity usage to maximize direct savings.
HYBRID System : Includes battery storage capability based on system design, providing backup power during grid outages or nighttime usage.
Installing solar cells is a high-value investment that converts sunlight into recurring monthly savings. If you are interested in planning your energy savings, Mono Solar Home offers free site surveys and professional consultations, backed by long-term service support.

One-Stop Service – Complete End-to-End Care

Free Grid Connection Permit Application: Full handling of paperwork with the Provincial/Metropolitan Electricity Authority (excluding government fees).
Free Panel Cleaning & System Inspection: Cleaning and safety checkup services 2 times/year for 3 full years.
Professional Engineering Team: Meticulous installation on all roof structures with standardized electrical distribution boards, 100% compliant with engineering standards.
Mono Care+ After-Sales Service: Dedicated support tracking and continuous assistance throughout your system's lifespan.
Solar Cell Accident Insurance (Optional): Added peace of mind protecting against fire, lightning, explosion, and natural disasters. Premiums start at only 2,140 THB/year (Coverage options range from 100,000 to 1,000,000 THB).
Flexible Payment Options & Great Financing Deals
Cash / Credit Card Installments
Supported Solar Loans & Leasing Options:

GSB (Government Savings Bank): Loan amount up to 500,000 THB without collateral requirement; interest rates starting at 3.50%.
GH Bank (Government Housing Bank): Receive a 10% installation grant (up to 50,000 THB) with a first-year interest rate of just 0.99% and repayment terms up to 40 years.
ICBC Leasing: Interest rates starting as low as 3.15% with flexible terms up to 84 installments.
Ratchthani Leasing: Fast approval with high credit limits up to 5,000,000 THB, serving clients nationwide.
Contact Us for a Free Solar Cell Consultation & Site Survey!
Whether you are interested in an On-Grid system for daytime savings or a Hybrid system with battery backup, our engineering team is ready to advise, design, and assess your site free of charge across Thailand. We operate through 3 main regional branches:

Headquarters: Phitsanulok Province
Chiang Mai Branch: Covering the Northern Region
Pathum Thani Branch (Chiang Rak Yai): Covering Bangkok, vicinity, and the Southern Region
For inquiries and details:

Phone: 081-160-4985, 091-024-3723 (K. Frong), 062-924-7916 (K. Mac – Chiang Mai Branch)
Line Official Account: @172bufmo (with @ prefix)