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24V to 12V 60A DC-DC Battery Charger
24V to 12V 60A DC-DC Battery Charger (Model: B2B241260)
Charge Your 12V Auxiliary Battery from a 24V Vehicle – Bluetooth Dongle & Temperature Sensor Included
The OLYS B2B241260 DC-DC Battery Charger provides controlled charging for a 12V auxiliary battery from a 24V vehicle electrical system. Designed for trucks, motorhomes and camper conversions, it delivers up to 60A charging output to replenish your house battery while travelling.
Supplied with a BT10 Bluetooth dongle and battery temperature sensor as standard, it offers convenient monitoring and battery temperature sensing.
Key Features & Benefits:
- 24V to 12V Battery Charging – Charge a compatible 12V auxiliary battery from your vehicle’s 24V starter battery and alternator system.
- Up to 60A Charging Output – Make use of driving time to recharge your house battery.
- Selectable Battery Profiles – Supports LiFePO4, AGM, GEL, sealed and flooded lead-acid batteries.
- Automatic Multi-Stage Charging – Regulates charging through boost, constant-voltage and float stages according to the selected battery profile.
- Bluetooth Monitoring Included – Supplied with a BT10 Bluetooth dongle for monitoring through the compatible app within Bluetooth range.
- Temperature Sensor Included – Supplied with an external battery temperature sensor for supported temperature-based charging functions.
- Battery Voltage Sensing – Supports external voltage-sense wiring to help compensate for voltage drop along charging cables.
- Built-In Protection – Includes overvoltage, overheating and short-circuit protection.
- Optional Display Meter – Supports the MT-2 display meter, available separately.
Who Is It For?
- Truck Owners – Charge a separate 12V auxiliary battery from a 24V vehicle electrical system.
- Motorhome & Camper Conversions – Pair a 24V vehicle platform with a 12V house battery system.
- Touring & Work Vehicles – Replenish the auxiliary battery used for fridges, lighting and other equipment between stops.
Why Choose the B2B241260?
If your vehicle runs on 24V but your house battery is 12V, the B2B241260 provides a dedicated charging solution. With selectable battery profiles, Bluetooth monitoring and a temperature sensor included, it helps you manage auxiliary battery charging while on the move.
Technical Specifications
| Feature | B2B241260 |
|---|---|
| Brand | OLYS |
| Nominal Input Voltage | 24V DC |
| Input Voltage Range | 21V–32V DC |
| Battery Bank Voltage | 12V / 12.8V LiFePO4 |
| Maximum Charging Current | 60A |
| Maximum Charging Power | 780W, as specified by OLYS |
| Recommended Auxiliary Battery Capacity | 100Ah–520Ah |
| Battery Compatibility | LiFePO4, AGM, GEL, sealed and flooded lead-acid; supported NCM lithium profile |
| Charge Stages | Boost, constant voltage, float |
| D+ Control Signal | 16V–32V; connection required for DC-DC charging |
| Bluetooth Connectivity | BT10 Bluetooth dongle included |
| Battery Temperature Sensor | Included |
| Temperature Compensation | -3mV/°C/2V for supported lead-acid profiles; not applied to lithium profiles |
| External Battery Voltage Sensing | Supported through SS- and SS+ terminals |
| Solar Input / MPPT | Not available on this model |
| AC Mains Input | Not available on this model |
| Optional Accessories | MT-2 display meter, sold separately |
| Operating Temperature Range | -20°C to 50°C |
| Standby Current | 32 ± 2mA |
| Dimensions | 190 × 215 × 70mm |
| Weight | 1.6kg |
What’s Included?
- OLYS B2B241260 24V to 12V 60A DC-DC Battery Charger
- BT10 Bluetooth dongle
- Battery temperature sensor
Keep Your Auxiliary Battery Charged While You Travel.
See the OLYS B2B/BS Series User Manual here: User Manual
Product FAQs
Q1: What does a 24V to 12V DC-DC charger do?
It uses a 24V vehicle electrical system to charge a separate 12V auxiliary battery, regulating the output to suit the selected battery profile.
Q2: Is it compatible with LiFePO4 batteries?
Yes. Select the appropriate LiFePO4 charging profile and use a battery with a suitable Battery Management System (BMS). Check that the battery can accept the charger’s output.
Q3: Can I connect solar panels directly?
No. The B2B241260 does not have a solar input or built-in MPPT controller. Solar charging requires a separate solar charge controller.
Q4: Can it charge from 240V mains power?
No. This model uses DC input from a 24V battery system. A separate AC battery charger is required for mains charging.
Q5: Does it require an ignition connection?
Yes. A suitable D+ or ignition control signal must be connected according to the manufacturer’s manual for DC-DC charging to operate.
Q6: Are Bluetooth and the temperature sensor included?
Yes. The BT10 Bluetooth dongle and battery temperature sensor are included as standard. The MT-2 display meter is available separately.
Q7: Can I monitor charging from my phone?
Yes. Connect the included BT10 Bluetooth dongle and use the compatible app to monitor charging while within Bluetooth range.
Q8: How long will charging take?
Charging time depends on battery capacity, starting charge level, available input power and any equipment operating during charging. Charging current reduces as the battery approaches full charge.
Q9: What should I check before installation?
Confirm the vehicle voltage, battery charging requirements and alternator capacity. Have a qualified installer select suitable cables, fuses and mounting arrangements, following the manufacturer’s manual.
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We have a 30-day return policy if the item is damaged or is not as described, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at sales@lifepo4oz.com. If your return is accepted, we’ll provide instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at sales@lifepo4oz.com.
If you change your mind, you may be eligible for a return, however the items must be unused and in their original packaging. Once returned to us, we will inspect the goods and, if approved, a 20% restocking fee will apply.
Damages and issues
If you receive any items which appear to be damaged, do not attempt to use them. Please inspect your order upon receipt and contact us immediately if the item is defective, damaged, or if you receive the wrong item, so that we can evaluate the issue and make it right.
Products damaged in transit
If you receive a shipment that has been damaged in transit, a replacement or refund may be provided, subject to the following conditions:
- The return or damage claim must be made within 24 hours of receiving the shipment.
- All shipments must be inspected for damage during the unloading process.
- Clear photos of the damaged packaging and damaged product must be provided as evidence.
- Photos must be taken during the unloading process.
- Photos must clearly show all damage and, where possible, the likely cause of the damage.
- The total approved claim value, including freight costs, will be credited to your account.
Exceptions / non-returnable items
We do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.
Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item. A 20% restocking fee will apply.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded to your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund.
All orders will be safely packed and shipped within 1 day. All products are shipped via Road Freight only.
All efforts are made to ensure the products safe during transport, however if you receive an item which looks like it may have been damaged during tranport you must take a photo before trying to use the product.
Shipping
All orders are shipped via Road Freight. As such there is not Express Shipping available.
RETURNS
We aim to keep our customers happy and if you are unhappy with your items due to them being damaged or not as described, simply return them for a refund. A 20% restocking fee will apply.
Top Quality Goods
Our aim is to provide high-quality products at an affordable price. If you receive a product that is damaged, do not use the item. Please inform us within 24 hours of receiving that product. We will replace the product as soon as possible without any charges.
REFUNDS
A refund will be provided if you have purchased an item that does not operate as described. Once we have verified you claims we will offer a refund and pay for the return freight cost.
