kindly describe the steps to calculate the ampere hour of a battery of 24 volt
connected to a machine of input power 4 kw to operate for 2 hours using K-Factor
This question was already posted as thread no. 28831, now the same has been repaeated with a different heading and slight change in wording.
The concept must have got clear from the previous posts.
For calculating the battery size do the following:
1. Calculate the load current.
2. Define the laod cycle, in your case it will be a continuous current for two hours.
3. As it is a continuous duty the formula for the AH capacity will be simple and direct. AH will be KI. Where k is dependent on the type of battery being used. You will get k-factor curves from the manufacturers for the type of battery being used.
4. So taking the value of K corresponding to a time of 120min multiply it by the current to get at the capcity value.
Remember then to take into account the following
Temperature correction factor, design margin and the ageing factor.