本帖最後由 Victor9394 於 2014-6-12 13:29 編輯
jwhongkong
電池都相對於太陽板價錢約一樣的, 大太陽板必然要配大電池, 小的當然配小的。另外, 電池有壽命短問題。其實晚間溫度會降低, 不用抽氣應沒問...
我有好多條數未識計添, 勞煩師兄賜教
你戶外用40W,電池有幾大容量呢?
去到家居用,
item.taobao.com/item.htm?spm=a230r.1.14.58.6T2Aox&id=17021940517&ns=1&_u=b1smpa5f12ae#detail
例如5W版, 咁又應該用幾大既電池
寫番住FORMULA先 - How to convert Wh to mAh
- How to convert watt-hour (Wh) to milliampere-hour (mAh).
- Watt-hour to milliampere-hour calculation formula
- The electric charge Q(mAh) in milliampere-hours (mAh) is equal to the energy E(Wh) in watt-hours (Wh) times 1000 divided by the voltage V(V) in volts (V):
- Q(mAh) = E(Wh) × 1000 / V(V)
- So milliamp-hour is equal to watt-hour times 1000 divided by volts:
- milliamp-hour = watt-hour × 1000 / V
- or
- mAh = Wh × 1000 / V
複製代碼
大WATT數令儲時間加快, 大VOLT又係, 首選邊樣好呢? |