20Amp 12V/24V Smart Battery Charger and Maintainer User Manual
Model: P20/20AMP/N20
Technical Specifications
- AC Input Voltage: 100-240V~50/60Hz
- Applicable battery type: Lithium, LiFePO4, Lead-acid (AGM, GEL, EFB, MF, FLOODED, VRLA, SLA, WET, etc.)
- Applicable battery voltage: 12V, 24V
- Charging Current: Max 20A (12V), Max 10A (24V)
- Minimum Start Volt: 2V
- Input Power with Load: Max 280W
- Net weight: 470g
- Dimension: 158*90*50mm
Features
- Supports Lithium, Lead-acid (AGM, GEL, SLA, Flooded, WET, EFB, etc.) and LiFePO4 batteries.
- Fully automatic microprocessor control with a 9-stage charging program for efficient battery charging.
- Charging voltage automatically adapts to temperature to prevent over- or under-charging.
- Includes a repair function for old, weak, and idle batteries.
- Provides overcharge protection, reverse polarity protection, short circuit protection, and spark-free contact.
- Features an LCD screen displaying voltage, current, battery power, and temperature.
- Selectable charge current.
- Auto-memory function retains the last selected mode.
How to Charge the Battery
- Connect the charger to the AC power outlet (100-240V~50/60Hz).
- Select the appropriate charging mode based on the battery type:
- Lithium: For 12V or 24V Lithium batteries, used with Battery Management Systems (BMS) only.
- Lead-acid: For ordinary lead-acid batteries including AGM, GEL, SLA, WET, DEEP CYCLE, EFB, Calcium, etc.
- LiFePO4: For 12V or 24V LiFePO4 batteries.
- Repair: For activation or maintenance of weak, old, and idle lead-acid batteries. Cannot repair severely damaged batteries.
- Adjust and select the appropriate charging current gear:
- 3A (24V) / 5A (12V)
- 5A (24V) / 10A (12V)
- 10A (24V) / 20A (12V)
- Connect the charger to the battery. The charger automatically recognizes the battery voltage and selects 12V or 24V.
9-Stage Charging Process
The charger utilizes a 9-stage charging process to optimize battery power precisely and gently:
- Battery desulfation
- Soft start charging
- Bulk charging
- Absorption charging
- Trickle charge
- Battery test
- Recondition charging
- Float & maintenance charging
- Small current to maintain charging
Repair Mode
Repair Mode is an advanced battery recovery function designed for repairing and storing old, weak, idle, damaged, stratified, and sulfated lead-acid batteries. The maximum repair time is 24 hours. This mode cannot repair badly damaged batteries.
Estimated Charging Time
The estimated charging time is for reference only; please refer to the actual charging time.
| Battery Capacity (Ah) | Charging Time (H) | 12V 5A | 12V 10A | 12V 20A | 24V 3A | 24V 5A | 24V 10A |
|---|---|---|---|---|---|---|---|
| 50Ah | 6.5 H | 3.1 H | / | 10 H | 6.5 H | 3.1 H | / |
| 120Ah | 15 H | 7.5 H | 4.2H | 25 H | 15 H | 7.5 H | / |
| 150Ah | 19 H | 9.5 H | 5.0 H | 31.5 H | 19 H | 9.5 H | / |
| 200Ah | 25 H | 12.5 H | 6.5 H | / | 25 H | 12.5 H | / |
| 400Ah | / | 25 H | 12.5 H | / | / | 25 H | / |
| 1000Ah | / | / | 38 H | / | / | 76 H | / |
Full Voltage of Different Batteries
| Battery Type | Max Voltage |
|---|---|
| 12V Lead-acid (AGM, GEL, EFB, MF, FLOODED, VRLA, SLA, WET, etc.) | 14.7V |
| 24V Lead-acid (AGM, GEL, EFB, MF, FLOODED, VRLA, SLA, WET, etc.) | 29.4V |
Warnings
- For 12V & 24V Lithium, Lead-acid, and LiFePO4 batteries charging only. Do not attempt to charge any other type of battery, as this may result in injury, death, or property damage.
- Cannot charge totally dead batteries. Do not charge a battery if you are unsure of its specific chemistry or voltage.
- This battery charger is not waterproof.
- Contact the seller for replacement if the charger is abnormal or the plug and clips are damaged or cracked.
- Stop charging if the battery is damaged or liquid overflows around the battery.
- Ensure ventilation to prevent flames and sparks. Do not expose the charger and battery to direct sunlight or high-temperature environments.
- Do not place the charger on the battery while charging. Avoid dropping metal tools on the battery, as this could cause sparks or short-circuit the battery, potentially leading to an explosion.
- Remove personal metal items such as rings, bracelets, necklaces, and watches when charging the battery.
- Unplug the charger from the outlet before performing any maintenance or cleaning to reduce the risk of electric shock.
- Unplug the charger promptly after the battery is fully charged.
- Ensure someone is supervising the charging process.
Troubleshooting
- Wrong polarity: Please change the connection of the clamps.
- Defect battery: Please have the battery checked by a mechanic and replace it if necessary.
- Bad connection: Please check the connection between the charger and the battery.
