Sergeantpepper @ 10 Jan 2020 19:34 写道: 12V* 12Ah =/= 144Wh ?
discounted to 133
Power in Watts = Current in Amps x Voltage
Consider the following…
A battery rated for 100 amp hours will provide 5 amps for 20 hours.
If we have a 12 volt battery, we multiply 100 by 12 and determine that the battery will provide 1200 watt hours.
To apply the metric ‘kilo’ prefix, we divide the result by 1000 and determine that the battery can supply the 1.2 KW hours.
There is something to keep in mind. The Amp Hour rating is a 20 Hour rating, therefore it is necessary to treat any kilowatt conversion you make as a 20 hour rating as well.
In the case of our 1200 Watt Hour conversion, we need to understand that what is really being said is that the battery will provide 60 Watt Hours for 20 Hours.