How To Calculate Backup Time From Ah Rating Of Battery. For NiFe for example using Solar this could typically be. A Wt V 3 where V DC battery voltage eg 12 V.
Battery Life Calculator Formula and Equations Here is the formula of charging time of a lead acid battery. Other chemistries such as LiFe LiMh batteries will be different. In order to calculate the battery backup time multiply the battery size in AH by the number of batteries needed by battery voltage usually 12V by battery efficiency rate usually 080 then divide your answer by your power load in Watts.
So the battery you need must be of 3456Wh 2 2 13824Wh or above.
UPS Backup Battery Ah VoltsLoad 1Power Factor Example. Start the timer and Measure the voltage continuously when it gets to the terminal voltage check the time. Battery voltage 12 V 2 Bank x 17 Batteries. Q E V 264 12 22 Ah.
