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The line of Sentry SFR chargers is in an elite class, setting the standard for dependable battery chargers. Sentry chargers are designed to operate for decades in the harsh marine environment. They are completely field serviceable and come with a 2-year parts and labor warranty.
Sentry SFR battery chargers are designed for fully automatic, unattended operation, with charging outputs for Lead-Acid, AGM, Gel and Lead Calcium batteries. Once batteries reach full charge, Sentry chargers turn off completely. There is no output trickle to overcharge or dehydrate batteries. Additionally, optional temperature sensor reduces output to prevent overcharging.
Sentry chargers have negative ground with three outputs, allowing three separate banks of batteries to be charged simultaneously. A fourth output is available on some models.
For long voyages, Sentry SFR is the charger to have aboard. The manual/ automatic switch allows you to bypass the voltage regulating circuit, and most repairs can be accomplished with just a few spare parts.
Front-panel includes LED charge status and fault indicators and manual/ automatic selector switch.
All models are current limited and ignition protected for engine room installations.
Features
- Available in 12VDC, 24 VDC and 32 VDC models
- Charging outputs for Lead-Acid, AGM, Gel and Lead Calcium
- Full cutoff when full charge reached – no “trickle” charge
- Temperature sensor reduces output to prevent overcharging
- Ignition protected for engine room installations
- Three bank charging (4 bank option available for 60 amp models)
- LED charge status and fault indicators
- Optional volt and ammeter available
- Current limiting protection
- Drip proof cabinet
- AC fuse protection
- Automatic reset DC Breaker
- Reliable ferro-resonant technology
- Field repairable for long voyages
- Two year parts and labor warranty
| Model | SFR2440/3XJ |
| Type of Battery | Lead Acid/Gel/AGM |
| DC Output Voltage | 24V |
| DC Output Current | 40 A |
| Lead-Acid/Gel (CI/CO) | 25.0/28.0 |
| AGM (Cut In/Cut Out) | 25.4/28.5 |
| # Output Banks | 3 |
| AC Input Voltage | *115/230 VAC |
| AC Input Current | 13/6.5 A |
| Input Frequency | **50/60 Hz |
| Height in/mm | 16.25 / 413 |
| Width in/mm | 13.75 / 184 |
| Depth in/mm | 7.25 / 184 |
| Weight lb/kg | 39 / 17.7 |
| DC Output Fuse | Yes |
| AC Input Fuse | ****15A |
| Temp Sensor Comp | Yes |
| CE Approved | Yes |
| Ignition Protected | Yes |
| Internal Fan | Yes |
| Current Limited | Yes |
| Battery Isolation | Yes |
| Charger Indicators | LED |
| Full/Charging Indicator | Yes |
| Fault Indicator | Yes |
| Manual/Auto Switch | Yes |
| Field Repairable | Yes |
| Warr.-Parts & Labor | 2 |
NOTE: All Sentry models include a control circuit switch for charging Flooded Lead-Acid, AGM, Gel and Lead Calcium batteries. Refer to Sentry SFR manual for battery type charging.
*NOTE: voltage is changed with a rocker switch.
**NOTE: frequency is changed with a slide switch.
***NOTE: 4 outputs available on special order.
****NOTE: AC fuses rated slow blow at 250VAC.
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