As I said, only point posting here is to make the people aware of false claims you are making apparently to sell your product. I don't feel any need to ask anyone as I'm an engineer and I know this stuff. you seems to be ignorant of highest level and I'm not interested wasting my time on you.
For those who are interested to learn, depth of discharged inversely proportional to charge cycles of battery. More deep you discharge batteries, lesser the life of battery and it is more relevant for starting batteries. Making discharge cut off point low to get more backup will ruin the battery.
Some precise and useful info can be found here
http://batteryuniversity.com/learn/article/lead_based_batteries
for those who lives in parallel universe and believe that a superman can "tweak" the system to achieve more that 100% efficiency, water kit is real and earth is flat, continue wasting your money as you rightly deserve this.