Battery Storage

I have a Schneider Electric 6848 Inverter and two Schneider Elec. 60/150 Controllers. For power storage I have 8 12v 250 AGM 250 GEL batteries. Questions: How much power storage in watts these batteries provide? How much of this storage I may use before they need recharging? It is my understanding that I cannot use more than a certain percentage of power storage.
Thanks for assistance.
Thanks for assistance.
Comments
Try to leave at least 20% charge remaining = 80% Depth of Discharge max.
An average of 50% DOD is typical, but not mandatory.
Battery Manufacturer =
Battery Model # =
Do you know how to compute Watts or Watt-Hours ?
-Bill