Hi spindrift,
Cycling less than 5% may not be a good idea. There is some limited evidence for this.
Cycling to 80% IS a *bad* idea. Life of the batteries will be much shorter.
Most folks aim at no lower than 50%.
The chart below is for batteries that are intended to be used for 20 years. (and they are the best of the best, and I can't afford them)
spindrift wrote:
Since deep cycle batteries are designed to be repeatedly discharged as much as 80%, does that necessarily mean that if you don't it will decrease battery life?