Instruction manual

Rev. P-071510 P/N VDC12248-MNL
BatteryMINDer
®
Model 12248
Page 23
The chart below shows the need to regulate the output voltage of the charger to ensure against over or
under charging your battery over a wide range of temperatures. Using your At-the-Battery Sensor will
accomplish this better than any other known method.
AGM Charge and Float Voltages at Various Temperature Ranges**
Temp
°F
Charge Float Temp
°C
Optimum Maximum Optimum Maximum
≥120 13.60 13.90 12.80 13.00 ≥49
110 – 120 13.80 14.10 12.90 13.20 43 – 49
100 -110 13.90 14.20 13.00 13.30 38 – 43
90 – 100 14.00 14.30 13.10 13.40 32 – 38
80 – 90 14.10 14.40 13.20 13.50 27 – 32
70 – 80 14.30 14.60 13.40 13.70 21 – 27
60 – 70 14.45 14.75 13.55 13.85 16 - 21
50 – 60 14.60 14.90 13.70 14.00 10 - 16
40 – 50 14.80 15.10 13.90 14.20 4 - 10
≤40 15.10 15.40 14.20 14.50 ≤4
**East Penn Technical Manual of Valve-Regulated Lead-Acid (VRLA) Absorbed Glass Mat (AGM)
Batteries, E.P.M. Form No. 0139 Rev. 3/04
Note: The above chart shows the Charge and Float voltage ranges v. temperature for sealed
24-Volt AGM type batteries. Values will differ for sealed Gel or Flooded (ller cap) or
maintenance-free types.