OEM / ODM Manufacturing
B2B121230 Series — 12V to 12V Battery to 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 12V-to-12V 30A DC battery-to-battery charger for RV and camper setups.
- 30A maximum charging current from a 12V starting battery
- Supports lead-acid, GEL, AGM, LiFePO4 and ternary lithium batteries
- Compact 147 × 118 × 41 mm (0.46 kg) · 2-year warranty
Function
1.This is a B2B fully automatic battery charger, designed for charging batteries for RVs, campers, ships, etc.
2.It adopts an automatically adjustable three-stage charging program, suitable for 5 types of batteries including lead-acid, AGM, GEL, lithium iron phosphate, and ternary lithium batteries
3.It can be connected to an external display and Bluetooth module to view data through a mobile phone APP (accessories need to be purchased separately)
4.If you need to travel a long distance, please fully charge
5.Exquisite design, small size, light weight, high-frequency switching and buck-boost technology to ensure safe and reliable operation
6.Fully automatic operation, when the car generator starts, the charging function is automatically activated.
7.Unattended charging, the controller will automatically disconnect from the main battery in extreme cases, such as overheating, overvoltage, short circuit, overcurrent, etc.
8.External temperature sensor,
1-1：The charging voltage can be automatically corrected according to the ambient temperature (only applicable to lead-acid batteries, lithium batteries do not have temperature compensation function)
1-2：When the ambient temperature is too low (-20℃) or too high (50℃), the charger charges at a safe voltage
Technical Parameters
| model | B2B121230 |
| Main battery Ⅰ | |
| Lead acid, gel, open battery voltage | 12V |
| LiFePO4 nominal voltage | 12.8V |
| Ternary lithium battery nominal voltage | 11.1V |
| Recommended battery capacity | 45-280AH |
| Battery voltage range | 8V-16V |
| Starting battery II | |
| Automobile starting battery voltage | 12V |
| Minimum recommended capacity | 60AH |
| Starting battery II voltage input range | 10.5-16V |
| Maximum charging power | 390W |
| Main battery maximum charging current | 30A |
| Effective D+ signal voltage range | 8-16V |
| Temperature compensation | -3mv/℃/2V |
| Main battery temperature sensor input “TT” | YES |
| No-load current | 12mA |
| Weight | 0.46kg |
| Dimensions | 147*118*41mm |
| Usage environment | -20-50℃ |
| Optional accessories | Display (MT-2)
Bluetooth module (BT10) Temperature sensor (TRS) |
DC12V→DC12V
| Model | Input voltage→output voltage | DC-DC Charging Current | Solar panel charging current | Maximum solar panel power |
| B2B1230 | 12V→12V | 12V/30A | — | — |
| B2B1260 | 12V→12V | 12V/60A | — | — |
| BS123020 | 12V→12V | 12V/30A | 12V/20A | 250W |
| BS126030 | 12V→12V | 12V/60A | 12V/30A | 430W |
| BS126045 | 12V→12V | 12V/60A | 12V/45A | 620W |
DC12V→DC24V
| B2B122425 | 12V→24V | 24V/25A | — | — |
| BS12242530 | 12V→24V | 24V/25A | 24V/30A | 820W |
DC24V→DC24V
| B2B242450 | 24V→24V | 24V/50A | — | — |
| BS24245030 | 24V→24V | 24V/50A | 24V/30A | 820W |
DC24V→DC12V
| B2B241260 | 24V→12V | 12V/60A | — | — |
| BS24126050 | 24V→12V | 12V/60A | 12V/50A | 685W |
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.
