All NiFe Batteries Cells are rated at 1.20V DC each, however the Cells initially need to be Condition Charged to 1.65~1.85V each & then Discharged to 1.00V, 3~5 Times, devide 1.85V into your inverters Max. Charge Rate.
NB: Nearly all Hybrid battery Inverters have a Max. 60V DC Battery Charge limit.
So, unless you have a 70V~72V DC Charger, a 48V Battery Bank need to be configured & Charge as follows;
The Recommended Cell Charge Rate 1.85V DC, to Condition the Batteries for the First 3~5 Charges or Batteries Left Flat;
Discharge time is basically the Ah rating ÷ Applied Load.
Charge Formulas;
Example: Battery Ah x Battery Voltage ÷ Applied Load.
So, for a 1'200Ah battery with a load that draws 30A you have: #1200÷30 =40 hours.
The charge time depends on the battery chemistry and the charge current. For example, NiFe using Solar this could typically be <65% of the Ah rating for 4~6 hours. Other chemistries, such as LiMh batteries will be different.
Say, 1'200Ah x 48V÷1000 Watts =12 hrs (with 40% loss at the Max. = 48x36÷1000 =1.92 hrs).
For sure, the backup may lasts up to 4.8 hrs at 100% efficiency.
#1200mAh is the same as 1.2Ah. 300mA is the same as 0.3A
Wh = Ah x Voltage, where 1kW = 1000W.
"C" Rating is the Battery Charge or Discharge Rate.
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