Category: Electrical and Electronics

by ismail qaudri / on 8 September, 2026

Rechargeable Fan Runtimes Are Measured on the Lowest Speed

Every fan advertises hours. Almost every figure was taken on speed one with a new battery in a laboratory. How to read the claim honestly, and whether the solar panel on the box does anything.
by ismail qaudri / on 8 September, 2026

Your Panel Is Rated at 25 Degrees. Your Roof Is Not

The number on the back of a panel is measured on a bench at 25 degrees with a clean cell. Nigeria gives you the light and refuses the temperature. What you actually get, and where the price difference hides.
by ismail qaudri / on 8 September, 2026

Most 2000W Inverters Hold About Half of That

Two boxes marked 2000W can be different machines. One holds it all evening, one reaches it for a second and a half. Work backwards from your load instead, and buy pure sine wave if a compressor is involved.