Qoltec Smart AC-DC Battery Charger
User Manual and Technical Specifications
Introduction
Thank you for choosing the Qoltec AC-DC smart charger. We are confident that this product will meet your expectations. This manual provides instructions for the installation and use of the product, including important safety guidelines for proper operation and installation. If you have any questions after reading this manual, please contact our Customer Service Department.
Safety Instructions
- The device is intended for indoor use only; do not use it near flammable materials.
- Never leave sparks or flames near batteries, as explosive gases may be generated during normal operation.
- The device must only be used at its rated voltage and frequency.
- If it is necessary to pass cables through walls with sharp edges, always use appropriate protective sleeves or cable conduits to avoid damaging the cables.
- Do not allow children to play with the device.
- Do not expose the device to water.
- Ensure that the air inlets and outlets of the device remain free from any obstructions.
- Be careful not to reverse the polarity of the battery connection.
- Do not charge batteries that are not designed to be charged.
- Disconnect the power supply before making or breaking connections to the battery.
WARNING! Risk of electric shock! Do not open the device if it is connected to an AC power source. This device has been tested according to CE standards and complies with applicable directives and standards.
NOTE: Batteries undergo a wear process after many years of use. Regular battery maintenance (e.g., annually) is recommended. After this period, batteries should be serviced by a qualified technician, otherwise damaged batteries may cause fires or other safety hazards.
Charging Instructions
- Connecting the charger to the battery (See Figure 1 in the appendix)
- Set the ON/OFF switch to the OFF position.
- Disconnect the AC power cable. Connect the black cable to the terminal marked [-] on the charger side. Connect the other end of the cable to the negative pole of the battery.
- Connect the red cable to the terminal marked [+] on the charger side. Connect the other end of the cable to the positive pole of the battery.
- Activating the charger
- Connect the AC power cable to the charger and to the AC socket.
- Set the ON/OFF switch to the ON position.
- The charger's front panel features a control panel with charging mode selection suitable for different battery types: STD, GEL, AGM, CAL, and LiFePO4. This allows the user to adapt the charging process to the specific battery type, ensuring optimal performance and extending battery life. Additionally, the charger is equipped with an LED indicator that shows the current charging stage: FLOAT (maintenance charge), ABS (absorption charge), or BULK (main charge).
- Deactivating the charger
- Disconnect the AC power cable from the AC socket.
- Set the ON/OFF switch to the OFF position.
- Disconnect the charger clamps connected to the battery.
Three-Stage Charging
Stage 1: This initial stage is designed to ensure maximum battery charging by accelerating the charging cycle. The "BULK" LED lights up to indicate that the unit is providing maximum charging current, stimulating the weak battery to absorb energy.
Stage 2: When the battery reaches approximately 90% of its nominal capacity, the charger will enter the "ABSORPTION" mode. During this stage, the unit provides a constant voltage to the battery with reduced current.
Stage 3: Once 90% charge is achieved, the "ABSORPTION" LED will turn off, and the "FLOAT" LED will turn on. In "FLOAT" mode, the charging current will be reduced, and the charging voltage will remain constant. The battery is now in the constant charging mode, "FLOAT".
Technical Specifications
Models: 51955, 51956, 51957, 51958, 51959
| Model | 51955 | 51956 | 51957 | 51958 | 51959 |
|---|---|---|---|---|---|
| Input Voltage | 180-260 VAC-50Hz | ||||
| Battery Voltage | 12V | ||||
| Charging Ripple/Absorption |
14.2-15VDC | ||||
| Float Charge | 13.2-13.8VDC | ||||
| LiFePO4 Charge | 14.7 V+/-0.1 VDC | ||||
| Output Current DC | 30A | 40A | 50A | 10A | 20A |
| Operating Temperature |
0-40°C | ||||
| Ventilation | Cooling fan, thermal control | ||||
| Output Ripple | <50 mA at full load | ||||
| Efficiency | 88% | ||||
| Load Regulation | 1.5% of output current: from no load to full load | ||||
Models: 51952, 51953
| Model | 51952 | 51953 |
|---|---|---|
| Input Voltage | 180-260 VAC-50Hz | |
| Battery Voltage | 24V | |
| Charging Ripple/Absorption |
28.8-29.6VDC (AGM, GEL) 28.4-29.2VDC (LiFePO4) |
|
| Float Charge | 27.0-27.6 V (AGM, GEL) 27.2-27.6 V (LiFePO4) |
|
| Output Current DC | 10A | 20A |
| Operating Temperature |
0-40°C | |
| Ventilation | Cooling fan, thermal control | |
| Output Ripple | <50 mA at full load | |
| Efficiency | 88% | |
| Load Regulation | 1.5% of output current: from no load to full load | |
Models: 51916, 51917, 51918, 51919
| Model | 51916 | 51917 | 51918 | 51919 |
|---|---|---|---|---|
| Input Voltage | 180-260 VAC-50Hz | |||
| Battery Voltage | 12V | |||
| Charging Ripple/Absorption |
14.2-15VDC (selectable) | |||
| Float Charge | 13.2-13.8VDC (selectable) | |||
| LiFePO4 Charge | 14.7 V+/-0.1 VDC | |||
| Output Current DC | 60A | 70A | 80A | 90A |
| Operating Temperature |
0-40°C | |||
| Ventilation | Cooling fan, thermal control | |||
| Output Ripple | <50 mA at full load | |||
| Efficiency | 88% | |||
| Load Regulation | 1.5% of output current: from no load to full load | |||
Troubleshooting
| Status | Possible Cause | Recommended Solution |
|---|---|---|
| No DC output or charger cannot start | No AC input voltage Interruption of operation due to overheating Poor connection of terminals Battery terminal contact or polarity reversal Short circuit at output Faulty fuse |
Check the AC power supply Wait for the unit to cool down Check the connection between the charger and the battery, connect correctly Check the fuse Check the AC input voltage, if it is within the input voltage range |
| Battery charging is not stable | The input voltage is not stable | Check the input voltage range |
| The setting does not match the battery type | Select the correct battery TYPE | |
| The charger cannot switch to "FLOAT" operation. | Connected cable is too small The battery pack is too thin. |
Replace the cable with the correct size. Replace the battery with a new one. |
| Battery is in poor condition. | Replace the battery with a new one. | Replace the battery with a new one. |
Maintenance
- The unit should be used in a well-ventilated area.
- Avoid charging batteries at extremely low or high temperatures.
- Regularly check cables and connections for any damage.
Disposal
Take the used device to an electrical waste collection point. Do not dispose of the device with household waste.
Warranty
The device is covered by a 24-month warranty from the date of purchase, which includes repair or replacement in case of manufacturing defects. To claim the warranty, proof of purchase (receipt or invoice) is required. The warranty does not cover damage resulting from misuse, incorrect installation, or tampering by unauthorized persons. If service is required, contact an authorized service center, which will provide professional diagnosis and repair. All service work must be performed only by qualified personnel to maintain the safety and proper operation of the device. If you have questions regarding warranty or service, please contact the customer service department.
Device Rear Panel Description
Image of the rear panel of the Qoltec charger, showing an AC input socket, an ON/OFF power switch, and ventilation slots.
