Technical guides

Working methods, not marketing copy

Every figure below comes out of the product we actually ship — the tank volumes, the unit weights, the support counts and the container loads. If a calculation needs a structural engineer's signature, we say so rather than paper over it.

Ballast & roof load

How much ballast does a flat roof solar array need?

Supports per row = modules + 1. One filled unit is 120 kg. Here is how those two numbers become roughly 45 kg/m² of roof load — with a scale table from 10 kWp to 1 MWp.

Read the guide → Thailand · programme terms

Thailand's People's Solar scheme: one million roofs, one deadline

THB 50,000 per household for 5–10 kWp, one million homes, all connected by 30 September 2027. The four dates, the guarantee rule that filters installers, and the six component lines that stop a crew.

Read the note →

What this series covers

Five questions come up in almost every flat roof enquiry. Each one gets its own note, written against the same set of real numbers.

01
Ballast weight and roof load — how many supports, how much water, what the roof ends up carrying.
02
Ballast versus penetrating mounts — where drilling wins, where it cannot be used at all, and what each costs in labour.
03
Wind uplift on low-tilt arrays — why averaging the pressure is the wrong method, and what the corner zones actually see.
04
Which roofs accept a ballast system — concrete, screed, single-ply and metal, and the boundary conditions that disqualify each.
05
Installing without drilling — the sequence, the crew size, and the mistakes we see most often in the field.

Need an answer now rather than a guide? Send us the roof and module count — we will run the layout for your project.