System and method for monitoring and controlling a back-up power supply using temperature controlled batteries

An uninterruptible power supply system, comprising:

• a back-up power supply comprising a plurality of primary battery banks arranged in parallel, wherein at least one of the plurality of primary battery banks is maintained in a long-term storage state and one of the primary battery banks is maintained in an operable state and is designated as a first working battery;
• a plurality of battery condition sensors, wherein each battery condition sensor measures the condition of a corresponding primary battery bank of the plurality of primary battery banks;
• a back-up power supply controller including one or more processors configured to:
• monitor the condition of the first working battery,
• determine if the condition of the first working battery is below a transition preparation threshold,
• responsive to a determination that the first working battery is below the transition preparation threshold, transitioning one of the primary battery banks previously maintained in the long-term storage state to the operable state, designating the transitioned primary battery bank as a second working battery, and switching the source of the power provided by the back-up power supply from the first working battery to the second working battery.