Project battery cycle life and calendar life under a given duty cycle.
Batteries fail from whichever limit arrives first. Lightly cycled home batteries are usually calendar limited, while heavily cycled commercial systems are cycle limited. A warranty quoting both a cycle count and a year count is honest about this; comparing only one number between products is misleading.
Battery Cycle Life
Life is the lesser of cycle-limited life and calendar life
Life is the lesser of cycle-limited life and calendar life Batteries fail from whichever limit arrives first. Lightly cycled home batteries are usually calendar limited, while heavily cycled commercial systems are cycle limited.
A warranty quoting both a cycle count and a year count is honest about this; comparing only one number between products is misleading.
This calculator takes 4 inputs: Rated cycles to 80 per cent capacity, Average depth of discharge, Cycles per day, Calendar life limit. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.