Question 1

What is a solar cell system and who is it suitable for?

Accepted Answer

A solar cell system converts sunlight into electricity using silicon photovoltaic panels. It is suitable for homes, commercial buildings, factories, and solar farms looking to reduce electricity costs by 30–70%. Thailand receives an average of 5–6 hours of peak sunlight per day, making it one of the most favorable locations in Southeast Asia for solar power generation.

Question 2

What is the difference between on-grid and hybrid solar systems?

Accepted Answer

An on-grid solar system connects directly to the utility grid, using a grid-tie inverter to convert DC power to AC. Excess power can be sold back via net metering, but the system shuts down during blackouts. A hybrid solar system adds battery storage, so it keeps running during outages. Hybrid costs about 40–60% more due to the battery and hybrid inverter, but provides energy independence and backup power.

Question 3

What is a solar inverter and what types are available?

Accepted Answer

A solar inverter is the core component that converts DC electricity from solar panels into 220V AC for household and industrial use. There are three main types: 1) Grid-tie inverter for on-grid systems, 2) Hybrid inverter supporting both grid connection and battery storage, 3) Off-grid inverter for standalone systems. The inverter capacity (kW) must match the total solar panel array output for optimal performance.

Question 4

What size solar system is suitable for a home?

Accepted Answer

A typical home with monthly electricity bills of 3,000–6,000 THB benefits most from a 3–5 kW on-grid solar system using 8–14 panels, requiring approximately 18–30 square meters of roof space. Installation costs range from 130,000–220,000 THB with a payback period of 5–7 years. The system continues generating power for up to 25 years based on panel lifespan.

Question 5

What permits are required to install solar panels in Thailand?

Accepted Answer

Installing an on-grid solar system in Thailand requires three steps: 1) Apply to the Provincial or Metropolitan Electricity Authority (PEA/MEA) for grid connection approval, 2) Register with the Energy Regulatory Commission (ERC) via the OSS system if capacity exceeds 200 kW, 3) Obtain a building permit (Aor.1) from local authorities if the mounting structure modifies the roof. Licensed contractors typically handle all permits on your behalf.

Solar Rooftop (On-grid) System

Related Articles

Frequently Asked Questions

Keep in touch!