Estimate daily energy use
Slide 6 assumes a medium-sized construction site with 100–200 workers. This is a worked example, not a standard system specification.
The presentation rounds this example up to approximately 300–350 kWh/day for safety and future expansion.
Estimate solar PV capacity
Slide 7 uses about 4–5 peak sun hours per day in Malaysia and allows approximately 20% system losses from the inverter, wiring, dust and other factors. Its formula divides daily energy by peak sun hours multiplied by efficiency.
350 kWh/day ÷ (4.5 hours/day × 0.8) ≈ 97.2 kW
The presentation rounds this to a 100 kW solar PV example. Its illustration labels a 330 Wp module measuring 1.0 m × 1.7 m and an array footprint of 27.2 m × 19 m. These are illustrative dimensions, not a project layout.
Consider battery storage
Slide 8 assumes two days of autonomy: 350 kWh/day × 2 days = 700 kWh. It separately discusses lithium-ion batteries at 90% depth of discharge and lead-acid batteries at 50%, with an approximately 1,400 kWh lead-acid example.
The source does not clearly distinguish usable from nominal capacity in its lithium-ion example. Confirm battery capacity, depth of discharge and reserve requirements with the project designer before sizing a system. The illustrated battery container is labelled 6.05 m × 2.43 m × 2.89 m.