Warehouse & Logistics Solar in Southern Thailand

An engineer has to check it every time. Panels plus mounting weigh around 12 to 15 kg per square meter, and older warehouses were often designed only for the weight of the original roof. We check the purlins and rafter spacing first, and have an engineer calculate and certify the structure in writing — a document that is also needed for the permit applications.

Businesses that use most of their power in the daytime pay back in around 4–7 years. But some warehouses use little power in the day — for example, a store with only lighting that already gets daylight through translucent roof sheets. Those need a smaller system sized to the real load. Warehouses with cold rooms, conveyors or air-conditioned offices use almost everything they generate. Estimated at THB 4.20 per kWh and Southern Thailand sunshine (1,350 kWh per kWp per year, rainy season included). Actual payback depends on your bill and when you use electricity — we calculate it for your property before quoting.

Garages work in the daytime and have heavy loads — air compressors, welders, car lifts and office air-con — that run while the panels generate. How worthwhile it is depends on how continuously those loads run, which we check from past bills before proposing a size. Garages that do spray painting or sanding should plan more frequent panel cleaning than ordinary buildings.

Yes. Roof work goes ahead while the warehouse operates. Power only has to be cut briefly while we connect to the main switchboard and when the PEA changes the meter. We schedule these outside working hours and tell you the power-cut times in advance, at the quotation stage.

Corrosion-resistant mounting and connections are standard, and connections are sealed more tightly than inland. Open seafront sites also need higher wind loads allowed for, and the shade assessment has to include tall light masts, cranes and yard canopies.

There is a grid-connection application to the Provincial Electricity Authority (PEA); systems under 1,000 kVA file a license-exemption notice with the Energy Regulatory Commission (ERC), while larger systems need a full license. If the installed area or weight exceeds the ministerial-regulation thresholds, a building-modification permit is also needed, and businesses on commercial meters must install equipment that prevents power flowing back into the grid. We handle these for you.

We issue full tax invoices and support 3% withholding tax for corporate clients. Under Royal Decree No. 805 of 2026, companies and people with business income can deduct 1.5 times the equipment cost as an expense; installation labor is not included. The equipment must be new and carry the No. 5 energy-efficiency label, and the deduction cannot be combined with other investment-promotion measures. The measure runs until the end of 2028. Confirm how it applies to your business with your accountant.