OEM / ODM Manufacturing
QA1200 Series — 1200W Waterproof Smart 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 1200W waterproof charger covering 12V–72V packs with current up to 45A.
- Multi-voltage output — DC 12 / 24 / 36 / 48 / 60 / 72V, current 08A–45A
- Waterproof to IP65 / IP67 / IP68 in a 280 × 197 × 85 mm case (3.9 kg)
- 100–240VAC universal input · 2-year warranty
This series chargers design of sealed structure. It suitable for flooded lead- acid batteries, sealed lead acid batteries, Lithium batteries, NI-MH batteries, Nickle Cadmium batteries, etc. They ate used to cycle charge or floating charge battery pack in electric Bumper Car, sightseeing vehicles, patrol vehicles, fork lifts, Floor Scrubber, AGV, ships, etc.
Protection Function
1.Burnout Protection: Temperature of charger exceeds the limitation. The charge will low down the power load. Temperature of environment exceeds 65℃, the charger will stop charging and switch itself to standby mode until temperature of environment goes down.
2.Protection for Reverse Connection of Batteries:The circuit inside the charger shuts down with batteries when the batteries are connected reversely and will not damage the charger.
3.NO-load Protection: There is no output when the batteries are not connected.
4.Short Circuit Protection: The circuit inside the charger shuts down with batteries when output is short circuit. The charger will start charging only after troubleshooting and restart the charger.
5.Automatic shutdown when fully charging: The charging automatically turns off after the battery is fully charged according to the charger’s judgment.
| Model： | CV | Charging constant current CC | Transition/cut-offCurrent | ||||
| Lead Acid | Li-ion | LiFePO4 | Current Limitation （A） | Lead Acid | Li | ||
| VT-QA1200A-12 | 14.7V | 16.8V | 14.6V | 35 | 7.0 | 1.75 | |
| VT-QA1200A-24 | 29.4V | 29.4V | 29.2V | 30 | 6.0 | 1.50 | |
| VT-QA1200A-36 | 44.1V | 42.0V | 43.8V | 25 | 5.0 | 1.25 | |
| VT-QA1200A-48 | 58.8V | 54.6V | 58.4V | 20 | 3.6 | 0.90 | |
| VT-QA1200A-60 | 73.5V | 67.2V | 73.0V | 15 | 3.0 | 0.75 | |
| VT-QA1200A-72 | 88.2V | 84.0V | 87.6V | 12 | 2.4 | 0.60 | |
Model List：Quickly find a model that matches your needs, please feel free to contact us！
450W QA Series (Waterproof)
| model | Input voltage | Applicable battery voltage | Charging Current | Applicable battery range | Dimensions | Weight | Output voltage | Product images |
| QA450A-12V15A |
180-240V |
12V | 15A | 90-120AH | 183*108*70 | 1.7kg | 14.7V |  |
| QA450A-24V12A | 24V | 12A | 90-120AH | 29.4V | ||||
| QA450A-24V15A | 24V | 15A | 90-120AH | 29.4V | ||||
| QA450A-36V10A | 36V | 10A | 60-80AH | 44.1V | ||||
| QA450A-48V06A | 48V | 06A | 48-64AH | 58.8V |
600W QA Series (Waterproof)
| model | Input voltage | Applicable battery voltage | Charging Current | Applicable battery range | Dimensions | Weight | Output voltage | Product images |
| QA600A-12V30A |
180-240V |
12V | 20-30A | 180-240AH | 199*122.5*77 | 1.9kg | 14.7V |  |
| QA600A-24V15A | 24V | 15-20A | 120-160AH | 29.4V | ||||
| QA600A-36V15A | 36V | 12A | 90-120AH | 44.1V | ||||
| QA600A-48V10A | 48V | 10A | 60-80AH | 58.8V | ||||
| QA600A-60V08A | 60V | 08A | 40-60AH | 73.5V |
750W QA Series (Waterproof)
| model | Input voltage | Applicable battery voltage | Charging Current | Applicable battery range | Dimensions | Weight | Output voltage | Product images |
| QA750A-24V25A |
180-240V |
24V | 25A | 150-200AH | 195*122*71 | 1.9kg | 14.7V |  |
| QA750A-36V18A | 36V | 18A | 120-160AH | 29.4V | ||||
| QA750A-48V15A | 48V | 15A | 80-120AH | 29.4V |
1250A QA Series (Waterproof)
| model | Input voltage | Applicable battery voltage | Charging Current | Applicable battery range | Dimensions | Weight | Output voltage | Product images |
| QA1250A-24V30A |
180-240V |
24V | 30A | 180-240AH | 231.9*136.5*76 | 2.8kg | 29.4V |  |
| QA1250A-36V25A | 36V | 25A | 150-200AH | 44.1V | ||||
| QA1250A-48V25A | 48V | 25A | 120-150AH | 58.8V | ||||
| QA1250A-60V15A | 60V | 15A | 80-12AH | 73.5V | ||||
| QA1250A-72V12A | 72V | 12A | 60-80AH | 84.0V |
2000W QA Series (Waterproof)
| model | Input voltage | Applicable battery voltage | Charging Current | Applicable battery range | Dimensions | Weight | Output voltage | Product images |
| QA2000A-24V40A |
180-240V With CAN communication and 12V3A |
24V | 40A | 240-350AH | 287*168*89 | 4.4kg | 29.4V |  |
| QA2000A-24V50A | 24V | 50A | 300-400AH | 29.4V | ||||
| QA2000A-36V40A | 36V | 40A | 180-260AH | 44.1V | ||||
| QA2000A-48V30A | 48V | 35A | 180-260AH | 58.8V | ||||
| QA2000A-60V25A | 60V | 30A | 150-240AH | 73.5V | ||||
| QA2000A-72V25A | 72V | 25A | 150-200AH | 88.2V |
3000W QA Series (Waterproof)
| model | Input voltage | Applicable battery voltage | Charging Current | Applicable battery range | Dimensions | Weight | Output voltage | Product images |
| QA3000A-48V50A | 180-240V
With CAN communication and 12V3A
|
48V | 50A | 300-400AH | 315*199*126 | 7kg | 58.8V |  |
| QA3000A-60V35A | 60V | 40A | 180-260AH | 73.5V | ||||
| QA3000A-72V30A | 72V | 35A | 150-240AH | 88.2V |
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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.
