If a 300 Ah Lithium battery is discharged 50% 150 Ahs one night then recharged with 100 Ahs the next day and the following night discharged another 100 Ahs , how would the Smart Shunt record the Total Charge Cycles and the Average Discharge .
Does it have to be charged to 100% to count as a Charge Cycle and would the second nights discharge be added to the first if so would it be in total or just the additional 50Ahs making the Deepest Discharge 200 Ahs
I admit to being very much OCD but i think when anyone looks as figures produced to assist in the operation of a system they would like to know the figures can be relied on and to do that they need to know how they are achieved . Many thanks
Hi David.
I’m not sure this is documented anywhere, but I believe a Cycle is registered from a Sync at 100% SOC, down to <65% SOC, then back to Sync. The 65% isn’t adjustable.
This may not happen daily for many people, and I even ran a Smartshunt for several years without it ever registering a single cycle (never discharged that low).
At Sync Ah is set to Zero. In between Syncs, Ah will just follow on from day to day until it sees Sync again.
But don’t try to read anything into the values for Ah being fed back into the batteries. That’s a calculated figure to keep it looking realistic. Ah isn’t a standard measure of energy as it relies on Volts too, so that sort of adjustment is necessary.