线性稳压器效率计算器 — 公式

## Solar Panel Sizing

### Formula

**Panel Watts = Daily Energy / (Sun Hours x Efficiency)**

Efficiency accounts for charge controller losses, wiring, temperature derating, and panel degradation. Typical system efficiency is 70-80%.

计算示例

50 Wh daily energy need, 5 peak sun hours, 75% system efficiency.

  1. Required generation = 50 / 0.75 = 66.7 Wh
  2. Panel watts = 66.7 / 5 = 13.3 W
  3. At 12 V: current = 13.3 / 12 = 1.11 A