OEM / ODM Manufacturing
QA300 Series — 300W Waterproof Lead-Acid Battery Charger
Industrial-grade design engineered for reliable, long-term performance — supplied through qualified manufacturing with OEM / ODM customization, export-ready packaging and worldwide delivery.
Talk to our engineering team for OEM / ODM projects and volume pricing.
A 300W waterproof charger covering 12V–48V lead-acid packs.
- Multi-voltage output — DC 12 / 24 / 36 / 48V, current 05A / 06A / 10A / 15A
- Waterproof to IP65 / IP67 / IP68, 152 × 118 × 62.5 mm (1.3 kg)
- 100–240VAC universal input · 2-year warranty
QA300 Series – 300W Waterproof Lead-Acid Battery Charger
A 300W sealed charger dedicated to lead-acid packs across 12V to 48V. It is the lead-acid specification of the QA300 platform, with the charging curve set for flooded, AGM and GEL batteries rather than a multi-chemistry compromise.
Why Choose the QA300 Lead-Acid Version
- Curve matched to lead-acid. Charging stages set for flooded, AGM and GEL batteries, including the finishing stage lead-acid packs need.
- Compact and light. 152 x 118 x 62.5 mm, 1.3 kg, for lockers and equipment bays with little room.
- Selectable current. 05A / 06A / 10A / 15A to match small and mid-size banks.
- Sealed construction. IP65 / IP67 / IP68 housing with 100-240VAC input and a 2-year warranty.
Specifications
| Rated output power | 300W |
| Battery voltage | 12V / 24V / 36V / 48V |
| Battery chemistry | Lead Acid (flooded, AGM, GEL) |
| Output current | 05A / 06A / 10A / 15A |
| Input voltage | 100-240VAC |
| Ingress protection | IP65 / IP67 / IP68 |
| Dimensions | 152 x 118 x 62.5 mm, 1.3 kg |
Charging Current by Input Voltage
Charging current by battery voltage for the VT-QA300A platform.
| Battery Voltage | Current (220VAC) | Current (110VAC) |
|---|---|---|
| 12V | 15A | 15A |
| 24V | 10A | 10A |
| 36V | 6A | 6A |
| 48V | 5A | 5A |
| 60V | 3.5A | 3.5A |
| 72V | 3A | 3A |
Charging current is identical on 220VAC and 110VAC input for this model.
Tell us your pack voltage and Ah rating and we will confirm the current setting and connector.
Related Products
B2B FAQ
Do you support BMS communication on your chargers?
Yes. Where the model supports it, the charger can communicate with the battery BMS over CAN or RS485 so charging stops at the values your BMS expects. The interface fitted to this model is listed in Key Specifications.
Can the charging curve be adjusted to our battery?
Yes. Charging voltage, current and the CC/CV stages can be set to your pack specification as part of an OEM / ODM order. Send your battery datasheet and we confirm the profile.
Can you supply the connector we already use?
Yes. We can fit your existing connector type and pin-out, or supply a matched connector and cable assembly.
Do you offer Custom Branding?
Yes. Custom Branding is available on the product label, housing and packaging for OEM and ODM programs.
How does sample development work?
Send your specification and target quantity. We confirm the configuration, provide a sample lead time and quote, then move to production once the sample is approved.
Tell Us About Your Project
Share your application, technical requirements and expected quantity — our B2B team will recommend the right product or customized solution.
