Electrical and Electronic

• Battery Service
  Amp hours. Since we are dealing with the DC side of the system most of the time, I find it easy to think in terms of amp hours used or replaced. If the power system used 120 AH/day it would take a hydro running at 5 amps for 24 hours to replace it assuming the battery system is 100% efficient. Lightly cycled systems can be 99% efficient but most are around 94% for hydro use. Solar and wind based battery systems can be around 80%. Most systems are hybrid versions of solar and hydro or ? so this figure will be unique to each.