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200amp is mean that battery is guaranteed to provide a continuous current of 20A over the discharge period of 10 hours (20A x 10h =200amp ) if the battery is of Class C10 and if it is of Class C20 it will provide a continuous current of 10A over the discharge period of 20 hours (10A x 20h =200amp ).
Generally, there are only two details you will find on the sticker of the battery other than the warranty, that is the battery voltage (‘V ') and battery rating (in ‘Ah ').
Where Ah or Ampere/hour capacity is current a battery can provide over a specified period of time to a specific End of discharge Voltage at a specific temperature. Whereas End of discharge Voltage is the level to which the cell voltage is allowed to fall to before affecting the load.
As the battery starts discharging, the voltage across its terminals starts reducing too but the rate of voltage drop throughout the discharging period is not too high. The voltage battery provides before it fails is called End of discharge Voltage.
Also, the battery voltage is the nominal voltage across battery terminals. Generally, the battery voltage for a 200amp battery is 12V or 24V.
A 12V, 200amp battery is the most common battery available in the market over the globe and it is made of 6 numbers of 2 V cells with End of discharge Voltage per cell is varied from 1.75 V to 1.8 V. Hence the End of discharge voltage for 12V battery varies from 10.5V (1.75x6) to 10.8V (1.8x6).
If you try to find the details of “End of discharge Voltage” for the battery on its sticker, you won 't find the same. To get the same you need to ask for the battery specification from the battery retailer or you can download the same from the manufacturer 's website.
Watt is the unit of power and the amount of power store in a battery is equal to the multiple of its Voltage and Ampere- hours, hence 12 volts 200amp battery is equal to 2400 watt (12x200), 24 volts 200 ah battery is equal to 4800 Watt (24 x 200) and a 48 volts 200 Ah battery is equal to 9600 Watt (48 x 200).
Answering the most common questions we get when customers buy a 200 amp battery:
To work out how many batteries of a certain size (200amp ) to power a home, you need the combined power consumption of your appliances and how long you need to power them.
For example, a single 200 Ah AGM battery can provide a combined power consumption of 400W (2 laptops each consuming 40W, 6 lights each 10W, a fridge drawing 200W) for about 60 min only.
Should your power consumption be higher i.e. you have more appliances or you want to run them for longer then you need more batteries.
The number of amps you can draw from a 200amp battery depends on the power consumption of the connected appliance. This in turn determines its discharge rate.
A 200amp battery will power a 400W appliance for about 2 hours.
A 200amp battery has about 200 x 12 = 2,400Wh of energy.
If you are to limit the depth of DOD to 50% (recommended for AGM), only 50% x 2,400 = 1,200 Wh is available.
In theory, it would for about 1200/400=3 hr. In reality, it will be less because at that much current draw (400/12=), battery capacity can reduce to as low as 177Ah!
