Phase Three "Smart" battery charging technology provides significant benefits over traditional float chargers whose output voltage droops under heavy loads, and fails to attain absorption voltage levels recommended by battery manufacturers as part of a proper charge cycle. Theses issues are particular significant in Emergency Vehicle applications where rapid recharge is required while powering DC loads, and reliable service life of a battery is critical. Smart Chargers interact with batteries and deliver a three stage charge process which provides for fastest recovery and ideal battery condition, maximizing performance and life.
Adaptability to different battery types and charge conditions is another important feature. A selector switch adjusts output voltage to adapt for proper charging of gel-cell, lead acid and AGM battery types. An optional temperature compensation sensor adjusts output for ideal voltage based on changes in ambient temperatures. This improves performance and extends battery life.
12 Volt Models | PT-7 | PT-14 | PT-25 | PT-40 | PT-70A |
Input VAC (50-60 Hz.) | 88-132 or 176-264 | 85-264 | 90-132 or 180-264 | 85-135 or 170-270 | 90-264 |
Input Amps @ Full Load |
@ 115 VAC | 2 | 2.8 | 6.5 | 8.5 | 12 |
@ 230 VAC | 1 | 1.4 | 4 | 4.3 | 6 |
P.F. Rating | >.65 | .98@115V .95@230V | .7 | .7 | .95@230V .98@115V |
Max Output Amps |
@ 115 VAC Input | 7 | 14 | 25 | 40 | 64 |
@ 230 VAC Input | 7 | 14 | 25 | 40 | 70 |
Output Banks | 2 | 3 | 3 | 3 | 3 |
Battery Capacity Amp-Hours | 14-70 | 28-140 | 50-250 | 80-400 | 140-700 |
Operating Temp. Rating Ref. | T-2 | T-2 | T-7 | T-1 | T-2 |
Weight; Lbs./Kg. | 3.2/1.5 | 8/4 | 8.2/4 | 12/6 | 15.2/7 |
Case Size Ref. | A-1 | A-2 | A-2 | A-3 | A-5 |
Optional Temp Sensor Model | N/A | TCS-12/24 | TCS-12/24 | TCS-12/24 | TCS-12/24 |
Case Size
Ref | Inches | Centimeters |
H | W | D | H | W | D |
A-1 | 10.5 | 5.0 | 2.8 | 26.7 | 12.7 | 7.1 |
A-2 | 12.5 | 7.7 | 4.3 | 31.8 | 19.6 | 10.9 |
A-3 | 14.1 | 9.5 | 4.0 | 35.8 | 24.1 | 10.2 |
A-4 | 15.5 | 9.7 | 5.0 | 39.4 | 24.6 | 12.7 |
A-5 | 16.7 | 9.8 | 6.7 | 42.4 | 24.9 | 17.0 |
A-6 | 19.5 | 12.2 | 8.2 | 49.5 | 40.0 | 20.8 |
Temperature Rating References
T-1 | -25˚C to +60˚C; Derate linearly from 100% @ 50˚C to 75% @ 60˚C |
T-2 | -10˚C to +60˚C; Derate linearly from 100% @ 50˚C to 80% @ 60˚C |
T-3 | -20˚C to +50˚C; Derate linearly from 100% @ 45˚C to 70% @ 60˚C |
Nominal Output Voltages at Gel/Flooded Switch Settings
(Without Temperature Compensation option installed or at 22.2˚C (72˚F) with Temperature Compensation option installed.)
Setting | Charge @ 50 % load | Float @ .5 amp load |
Gel-Cell | 14.0 VDC | 13.6 VDC |
Flooded/AGM | 14.2 VDC | 13.4 VDC |
Power Returned to Battery by 14 Amp 3-Step Charger vs 15 Amp Float Charger
Conditions: 200 AH Battery, 75% Charged, 4 Amp Constant Load
Temperature Compensation:
- 5 mV per cell per ˚C. Sensor supplied with 25' cable and plug-in connector
Protection (all models):
Input/Output Fuses, Current Limiting, Thermal Protection, Forced Air Cooling, Drip Shield