ZB 24V 5A Lead‑Acid Fast Charger – purpose‑built for large 24V lead‑acid battery banks (AGM, Gel, Flooded) with capacity from 30Ah to 50Ah. With a powerful constant output current of 5A, this charger cuts charging time by more than half compared to 2A models – a 40Ah battery can be fully recharged in just 8‑9 hours instead of 18‑20 hours. The advanced 3‑stage bulk‑absorption‑float algorithm, combined with a 800±50mA transition threshold, ensures safe and complete charging without overcharge or water loss. Includes 12 interchangeable plugs, global safety certifications, and fanless design. Ideal for heavy‑duty electric wheelchairs, commercial mobility fleets, golf carts, floor scrubbers, and other industrial equipment.
One charger works worldwide – choose your plug at order.
Charges 30‑50Ah batteries 50‑60% faster than 2A chargers.
3‑stage bulk‑absorption‑float with 800mA transition for large batteries.
Over‑current, over‑voltage, short‑circuit, reverse polarity, backflow, over‑temperature.
UL, CE, FCC, PSE, KC, CB, RoHS, IEC60601‑1, ISO7176‑31, UKCA.
Select Your Plug Type – Click any image to view full size
Technical Specifications
| Parameter | Value |
|---|---|
| Input Voltage / Frequency | 100‑240V AC, 47‑63Hz (wider range) |
| Output Voltage (Lead‑Acid) | 27.2‑29.6V DC |
| Output Current | 5A max (ultra‑fast) |
| Recommended Battery Capacity | 30Ah – 50Ah (largest among lead‑acid series) |
| Efficiency | ≥90% |
| Pre‑charge (Trickle) Current | 1000±200mA (for deeply discharged large batteries) |
| Transition Current (to float) | 800±50mA (optimized for high current) |
| Charging Stages | 3‑stage: Bulk → Absorption → Float |
| Cooling | Natural convection – fanless, silent |
| Housing Material | PC plastic, fire‑retardant, enlarged chassis |
| Dimensions (L×W×H) | 186×89×46mm (larger for 5A heat dissipation) |
| Net Weight | 670±5g (heavier due to larger transformer) |
| Output Connector | 3‑pin XLR male, 1200mm cable |
| Input Cord Lengths | US 1800mm, others 1300mm |
| Withstand Voltage | 4KV |
| Packing (Master Carton) | 20 pcs/carton (460×340×370mm, fewer units per box) |
Fig.1: Dimensions for 5A model (186×89×46mm)
Fig.2: Output connector – 3-pin XLR male, 1200mm cable
High‑Power 3‑Stage Charging for Large Lead‑Acid Batteries
The ZB 24V 5A Lead‑Acid Charger is engineered for high‑capacity battery banks (30‑50Ah). It follows the proven bulk → absorption → float profile, but with parameters optimized for 5A current:
- Bulk stage: Constant 5A current until voltage reaches absorption setpoint (≈28.8‑29.2V). This stage restores about 80‑90% of capacity and is over 60% faster than a 2A charger. For a 40Ah battery, bulk stage completes in roughly 6‑7 hours instead of 16+ hours.
- Absorption stage: Constant voltage with declining current. The charger maintains absorption voltage until the current drops to 800±50mA – a higher threshold than lower‑current models, appropriate for large batteries with higher saturation current.
- Float stage: Maintains a safe voltage (≈27.2V) to prevent self‑discharge and overcharge, extending battery life and reducing maintenance.
For deeply discharged large batteries (voltage below 20V), the charger enters a trickle pre‑charge at 1000±200mA to safely raise the voltage before engaging bulk stage. This is critical for batteries that have been stored for months.
Real‑world example: A 45Ah wheelchair battery will be fully charged in approximately 9‑10 hours with this 5A charger, compared to 22‑24 hours with a 2A charger – a difference of over 12 hours per day.
Six‑Layer Protection System
- Over‑current protection – automatically limits output when current exceeds 5A threshold.
- Over‑voltage protection – stops charging when voltage exceeds 30V to avoid battery damage.
- Short‑circuit protection – instant output shutdown in case of accidental short.
- Reverse polarity protection – no output when battery is connected backwards; both charger and battery remain safe.
- Backflow / anti‑reverse current protection – prevents battery voltage from feeding back into the charger.
- Over‑temperature protection – reduces power or shuts down when internal temperature exceeds safe limit – especially important for 5A continuous operation.
Global Certifications & Compliance
The ZB 24V 5A Lead‑Acid Fast Charger carries the following international certifications: CB, CE, FCC, PSE, SAA. These confirm compliance with essential safety and EMC standards, and include country‑specific approvals such as Japan (PSE) and Australia (SAA). Buyers should confirm local requirements for their market.
Application & B2B Information
Ideal for: Heavy‑duty electric wheelchairs, commercial mobility scooter fleets, golf carts, floor scrubbers, and industrial cleaning machines using 24V lead‑acid batteries with capacities 30‑50Ah. The 5A charger is the perfect choice for rental operations, hospitals, and repair shops that need fast turnaround and cannot leave batteries charging overnight.
Wholesale & Customization: Minimum Order Quantity (MOQ) is 20 pieces per type (mixed plug types allowed). OEM services include custom logo on housing, custom packaging, and label language (English / Japanese / UKCA). Sample orders supported. Delivery: 15‑25 days after payment confirmation.
12‑Month Hassle‑Free Warranty: If any unit fails due to manufacturing defect within warranty, provide a short video or photo as proof. We will credit the failed quantity on your next order – no need to return defective units, saving you return shipping costs and downtime.
Nameplate languages: English, Japanese, or UKCA marked labels are available upon request.
Shipping & Packing: Each charger includes selected input power cord, output XLR cable, and user manual. Master carton contains 20 units (460×340×370mm) due to larger dimensions and weight, ensuring safe transport.
Maintenance Tips for Large Lead‑Acid Batteries (30‑50Ah)
- After each use, recharge as soon as possible – deep discharging significantly shortens battery life, especially for large capacity units.
- Use the correct charger – a 5A charger is optimal for 30‑50Ah batteries; lower current may cause incomplete charge, higher current may overheat the battery.
- For flooded batteries, check electrolyte levels monthly and top up with distilled water.
- Ensure adequate ventilation during charging – large batteries can emit hydrogen gas.
