JOE-120 Battery Charger 
IP68 – Charging in Difficult Environment:
High impact plastic enclosure with pressure vent prevents the build-up of condensation.
“Auto Wake-Up” of the Battery:
The JOE-120 activates the battery BMS with pre-set voltage pulses.
Automatic Charge-Restart:
Auto switch-off at “Battery-Full”. Auto charge-restart after a pre-defined number of days or a set voltage level across the battery terminals.
Charge Profiles – Customizable:
New charge parameters can be uploaded via the IR-Interface
Retractable / Adjustable Hook available:
The charger can be safely suspended above clutter of oil or water puddles.
Technical Specifications
Lithium-based Batteries
| Li-ion Batteries, 3.6V/Cell (nom.) |
| 4S 7S 10S 14S |
| 7A 4A 2.5A 2A |
| LiFePO4 Batteries, 3.2V/Cell (nom.) |
| 4S 8S 12S 14S 16S |
| 7A 4A 2.5A 2.2A 2A |
Lead-based Batteries
| Nom. Voltage / Charge Current |
| 12V 24V 36V 48V |
| 7A 4A 2.5A 2A |
Product Specifications
| Output Power： | max. 120W |
| Mains Voltage / Mains Pins： | 100 - 240VAC / country specific AC-plug |
| Operating Temperature： | -30°C to +40°C |
| Dimensions / Weight： | 85x175x45mm / 800g |
| Charge Cord： | 1.2m, stripped wire ends / ring terminals |
| IP-Protection Class： | IP68 |
| Safety Functions： | Short-, Overload-, Reverse Polarity Protection |
| Certificates of Compliance： | UL,CE,UKCA,PSE |
Applications
e-Bikes, Motorbikes, Farming Tools, Boats, Yachts
Documents
The 24V 4A Battery Charger is a DC charging device designed specifically for 24V batteries,
Output specifications: Supports 24V/4A constant current and constant voltage output, total power of 128W, voltage regulation accuracy of ± 1%, current fluctuation range of ± 2%, compatible with various types of lead-acid batteries (SLA/VRLA/GEL/AGM), lithium iron phosphate batteries, etc. The product has IR parameter modification function.
Input compatibility: Supports 100-240VAC wide voltage input, frequency 50-60Hz, compatible with global power grid standards.
Environmental adaptability: The working temperature range is -20 ℃ to 40 ℃, and the shell is made of flame-retardant ABS material (fire rating UL94 V-0), which is resistant to UV aging and has passed IP68 protection level.
Safety mechanism: Built in overvoltage protection (31V ± 1V), overcurrent protection (≥ 4.4A), short circuit protection (automatic recovery), and equipped with a 75 ℃± 5 ℃ over temperature protection threshold.
Efficiency and lifespan: Conversion efficiency ≥ 93% (230VAC), using natural cooling technology, MTBF (mean time between failures) exceeding 50000 hours, meeting industrial reliability requirements.
2、 Core functions
Intelligent four stage charging
Adopting a four stage charging mode of soft charging (CC)+constant current (CC)+constant voltage (CV)+float charging:
Soft charging stage: Repair and charge the battery to 21V with a current of 2A to restore the charging state.
Constant current stage: Quickly charge to 29.4V (lead-acid battery) with 4A current to avoid battery overheating.
Constant voltage stage: The voltage stabilizes at 29.4V, and the current gradually decreases to 0.4A to prevent overcharging.
Float charging stage: The voltage drops to 27.6V, the current drops to 0.1A, and the battery is maintained in a fully charged state.
Explanation: The battery is fully charged. The charger can be disconnected from the battery. If the battery is kept in float charging mode and connected to the charger, the charger will restart charging after 7 days.
Environmental Adaptability Design
Impact resistant design: Through a 1.5-meter drop test, the shell has no cracks and the internal components are not loose.
Electromagnetic compatibility: Passed the EN 55032 Class B radiation interference test to avoid interference with other devices.
Multiple protection mechanisms
High voltage surge protection: Equipped with TVS diode, it can withstand 10kV surge impact and avoid lightning damage.
Electrostatic protection: Contact discharge ± 8kV, air discharge ± 15kV, in compliance with IEC 61000-4-2 standard.
3、 Typical application scenarios
industrial equipment
AGV car charging: powered by 24V/36Ah lead-acid batteries, supporting all-weather operation, with a single charging time of ≤ 8 hours.
Electric forklift backup power supply: In the event of a main power failure, quickly restore battery power through a 24V 4A charger to ensure continuous operation of the equipment.
Transportation and logistics
Electric sightseeing vehicle charging: Powered by 24V/45Ah battery pack for the scenic area, supports fast charging at night, and operates at full capacity the next day.
Logistics robot charging: compatible with 24V/20Ah lithium batteries, supporting automatic charging under intelligent scheduling system.
Security and Surveillance
Monitoring camera power supply: Provides power to 24V PoE cameras, protected by IP30 to prevent dust intrusion and ensure stable device operation.
Emergency lighting system: Provides power to 24V LED emergency lights during power outages, supporting continuous lighting for ≥ 3 hours.
Consumer Electronics and Tools
Electric golf cart charging: powered by 24V/50Ah battery pack, supporting all-weather operation of golf courses.
Electric lawn mower charging: compatible with 24V/30Ah lithium battery, charging efficiency is increased by 20%, and preparation time for operation is shortened.
