Installing a solar system is worthwhile in the long run for the following reasons:

• Electricity Savings - Can reduce electricity bills by 30-70% depending on system size and usage
• Reasonable Payback Period - Generally, solar installations pay for themselves in 3-5 years
• Long Lifespan - Solar panels have a lifespan of 25-30 years
• Reduced Pollution - Reduces carbon dioxide emissions to the environment
• Increased Property Value - Homes or buildings with solar installations have higher value

We recommend assessing your electricity usage and installation area to design a system that suits your actual usage and provides the best return on investment.

Solar systems require very little maintenance compared to other electricity generation systems. General maintenance includes:

• Cleaning Solar Panels - Panels should be cleaned 1-2 times per year, or more in dusty areas, to ensure they can receive light at full efficiency
• System Inspection by Specialists - The system should be inspected by specialists once a year to check efficiency and look for any damage
• Monitoring Electricity Production - Regularly observe system electricity production through the application or inverter display to ensure normal operation

Quesco Solar offers comprehensive solar system maintenance services, including cleaning and system inspection, to ensure your system operates at maximum efficiency throughout its lifespan.

Solar panels can be installed on almost all types of roofs, but efficiency and suitability vary depending on roof characteristics:

• Metal Sheet Roofs - Most suitable for solar panel installation due to easy installation, light weight, and high stability
• Tile Roofs - Can be installed but may require special mounting equipment and care to avoid tile breakage
• Concrete Roofs - Can be installed but must consider the additional weight on the structure
• CPAC Monier Roofs - Can be installed but require special techniques and equipment

Factors to consider when installing solar panels on roofs:

• Roof Direction - In Thailand, south, east, or west-facing roofs provide good electricity production efficiency
• Slope - A slope of 15-20 degrees is optimal for Thailand
• Structural Strength - The roof structure must be strong enough to support the weight of the solar panels

If the roof is not suitable, we also offer alternatives such as ground-mounted installation or separate supporting structures.

Quesco Solar provides comprehensive warranties for all solar systems:

• Solar Panels:
  • Product Warranty: 15 years (covers manufacturing defects)
  • Performance Warranty: 25-30 years (guarantees panels will produce no less than 80% of initial efficiency after 25-30 years)
• Inverter: 5-10 years warranty depending on model and brand
• Mounting Equipment: 12 years warranty
• Installation: 2 years warranty covering installation issues

Additionally, we offer comprehensive after-sales services:

• Technician team always ready to provide service
• Online electricity production monitoring system
• Annual system inspection and maintenance service
• Solar panel cleaning service

Yes, solar panels can still produce electricity on cloudy or rainy days, but efficiency decreases depending on light conditions:

• Partially Cloudy Days - Efficiency drops by approximately 10-25% compared to clear sky days
• Very Cloudy Days - Efficiency drops by approximately 50-75%
• Heavy Rain Days - Efficiency drops by more than 80%, or may not produce electricity at all during very heavy rain

Modern solar panel technology has been developed to work even in low light conditions. Therefore, even on cloudy days or light rain, the system can still produce electricity, though less than normal.

When designing a system, we calculate using year-round average data, which includes rainy and cloudy periods, to ensure the most accurate electricity production and payback period forecasts.