Folks, I've looked and looked (googled) but cannot find any information that is useful for determining a battery bank's depth of Discharge based upon loaded DC voltage. I only mention this since the operators manual from my Magnum Energy inverter indicates various cutoff voltages for the inverter based upon loaded battery voltage. The default is 10 volts DC (for a 12 Volt system) but it doesn't seem to take into account how large the battery bank is in amp/hrs or what rate of discharge is being enacted by the load. I feel that 10 volts is WAY too low if the purpose of cutoff is to preserve the battery, but all information I've located speaks only to voltage of unloaded batteries at rest. I have requested data from the manufacturer but based upon previous requests for information, I'm not holding my breath... any thoughts??