Please remember watt is power!
(Watt Hour) Power = Battery Voltage X Amp Hour (Ohm’s law)
If we follow this equation, we can answer the question of how many watt-hour is in a 12 V battery with a better understanding.
Use This Equation
Battery Voltage = 12V
If battery amp hour = 1 Ah, Watt Hour = 12 V X 1 Ah = 12 Wh
If battery amp hour = 400 Ah, Watt Hour = 12 V X 400 Ah = 4800 Wh
|12V||12 W||1 A|
|12V||36 W||3 A|
|12V||60 W||5 A|
|12V||84 W||7 A|
Pro Tips: Never drain the battery past 50% charge to maintain its lifespan.
A 12V 1 ah (amp-hour) battery can put out 12 watts for 1 hour.
A 12V 2 ah battery has 24 watts for 1 hour.
A 12V 500 ah battery can output 6 KiloWatts for 1 hour
What is amp hour?
Amp-hour is a common term used for rating energy storage device capacity, especially rechargeable batteries. The higher the rating is the longer the battery’s run time.
A 1-ampere hour is a unit of electric charge multiplied by time. It equals the charge transferred by a steady current of one ampere flowing for one hour, or 3,600 coulombs.
What does 200 amp hour actually mean?
200 amp hour means a 12V battery operating at 1 amp can run for 200 hours.
We can also calculate how many hours a particular capacity battery can run if you know the amperage.
- If operating at 2 amp, the battery can run for 100 hours (200 amp hour / 2 amp)
- If operating at 4 amp, the battery can run for 50 hours (200 amp hour / 4 amp)
- If operating at 10 amp, the battery can run for 20 hours (200 amp hour / 10 amp)