The Enerdrive B-TEC ULTRA 460Ah is the largest battery in the B-TEC Ultra range. It has the exact same footprint as the 300Ah B-TEC Ultra - 500 x 265mm - with 160Ah more storage. If you already planned a space for a 300Ah, this drops straight into it.
IP67 rated, 6,000 cycles, 300A continuous, built-in cell heater, and a 5 year warranty.
Pickup and freight
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Pickup from our Sunshine Coast store - it weighs 44.5 kg, so collection is the easiest option
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Freight is available on a skid and quoted per order. Send us your postcode and we will come back with a price
- Questions before you buy? Call 07 5211 0841
Key features
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Same size, 53% more power - identical footprint to the 300Ah B-TEC Ultra
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Dual terminals - M8 x2 positive and x2 negative. Only the Ultra 300Ah and 460Ah have these
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IP67 - 100% dust tight, submersible to 1 metre for 30 minutes
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6,000 charge cycles at 80% DOD, Grade-A prismatic cells
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300A continuous, 1000A peak (5 sec) - runs compressors, induction cooktops, inverters and winches
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Built-in cell heater, BMS-controlled - charge from -20C
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Bluetooth app (iOS and Android) - voltage, current, SOC, temperature, individual cell voltages, alarms, cycle history
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CAN / 485 comms via M12-6P Link In / Link Out ports
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SOC display - four LEDs in 25% steps, plus a RUN/ALM fault light
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On/off switch and pressure relief valve
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IEC62619 certified at cell level
- Battery tray and straps included
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Expandable - up to 4 in series and 4 in parallel
Fitting it legally in an Australian caravan, camper or canopy
This is the part most listings skip. If the battery is going into a caravan, camper trailer or motorhome, the install has to satisfy AS/NZS 3001.2:2022. Here is how the B-TEC Ultra lines up, straight from Enerdrive's own fitting guide:
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Cells comply with AS IEC 62619 - Clause 5.4.12.3.1
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The BMS covers over and under voltage at cell level, over and under temperature, and over current - Clause 5.4.12.3.3
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Bluetooth state-of-charge monitoring satisfies Clause 5.4.12.3.4. If you are running several in parallel, Enerdrive recommends adding a standalone lithium battery monitor as well
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Built-in spill tray - Clause 5.4.11.3.3
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Tray and straps included to restrict movement - Clause 5.4.5
What you still have to do: the battery must sit in a designated dry battery compartment. If that compartment is inside the structure it has to share an outer wall or floor, be sealed so gases cannot reach the living space, and be vented to the outside through a minimum 20mm hole positioned so water cannot get in. Access for maintenance must be straightforward.
⚠️ Worth being clear about: IP67 means the battery itself will survive rain, dust and immersion. It does not mean you can bolt it to an open tray and call a caravan build compliant. The compartment requirement is about venting gas away from where people sleep, not about keeping the battery dry.
Before you use it
Enerdrive's commissioning steps: check no washers or non-conductive material sit under any lug, tighten every connection, confirm the battery is secured, then charge to 100% before first use so the internal and external monitors sync. Run a discharge test with your real loads (inverter included) and feel for hot connections - heat usually means a loose or undersized cable.
Ultra or Slim?
The B-TEC range splits two ways. Ultra is the tough one: IP67, 6,000 cycles, tray and straps included. Slim trades that for a space-saving profile at IP52 and 2,500 cycles. If the battery lives anywhere it can get wet or shaken, you want the Ultra.
Full specifications
- Capacity: 460Ah · Nominal voltage: 12V · Chemistry: Lithium LiFePO4
- Max load current: 300A @ 25C · Peak discharge: 1000A for 5 seconds
- Max charge current: 300A @ 25C · Nominal charge current: 150A
- Charge voltage: 14.2 - 14.6V · Standby float: 13.5 - 13.6V
- Charge and discharge temperature: -20C to 60C
- Low cell voltage disconnect: 2.80V or below · High cell voltage disconnect: 3.75V or above
- Cycle life: 6,000 cycles at 80% DOD
- Comms: CAN / 485, M12-6P
- Terminals: M8, x2 positive and x2 negative, torque 8-10 N.m
- Series / parallel: up to 4 in series and 4 in parallel
- Ingress protection: IP67 · Cell certification: IEC62619
- Dimensions: 500 x 265 x 323.5 mm · Weight: 44.5 kg
- Warranty: 5 years · SKU: EPL-460BT-12V-G3
Frequently asked questions
Will the 460Ah fit where a 300Ah B-TEC Ultra goes?
Yes. The 460Ah has the same footprint as the 300Ah B-TEC Ultra at 500 x 265 mm, so it drops into the same space. The one thing to plan for is weight - the 460Ah is 44.5 kg against the 300Ah's 37.5 kg, so check your mounting surface and payload.
Can I charge a lithium battery in cold weather?
Yes, this one has a built-in cell heater controlled automatically by the BMS. It warms the cells to a safe temperature before charging, so the battery is rated to charge and discharge from -20C to 60C. Most lithium batteries without a heater simply refuse to charge below freezing, which is what catches people out in alpine and inland winter conditions.
Does the B-TEC Ultra meet AS/NZS 3001.2:2022 for caravans and campers?
The battery itself meets the product-side requirements: cells comply with AS IEC 62619 (Clause 5.4.12.3.1), the BMS protects against over and under voltage at cell level, over and under temperature and over current (Clause 5.4.12.3.3), Bluetooth SOC monitoring satisfies Clause 5.4.12.3.4, it has a built-in spill tray (Clause 5.4.11.3.3) and it ships with a tray and straps to restrict movement (Clause 5.4.5). Compliance of the finished build is down to the installation - the battery must sit in a designated dry compartment, sealed from the living space and vented to the outside through a minimum 20 mm hole.
Can I mount it externally under a ute tray?
The battery is IP67 - fully dust tight and able to handle immersion in 1 metre of water for 30 minutes - so it will survive an exposed mount. Be careful not to confuse that with compliance: for a caravan, camper trailer or motorhome build under AS/NZS 3001.2:2022, the battery still needs to be in a designated, sealed, vented compartment. That requirement is about directing any vented gas away from the sleeping area, not about keeping the battery dry.
How many can I connect together?
Up to 4 in series and 4 in parallel. At 12.8V nominal you can run 4 in parallel; going to 25.6V, 38.4V or 51.2V uses 2, 3 or 4 in series, and each of those can still be paralleled up to 4 deep. When paralleling, the connecting cables must be equal length and equal size, otherwise the batteries share load unevenly.
What do the lights on the battery mean?
Press the system button and four SOC LEDs show state of charge in 25% steps. The RUN/ALM light is solid green while charging or discharging, blinks green in standby, and turns solid red if there is a fault. When charging, the LED for the band you are currently filling blinks while the ones below it stay solid.
What size DC-DC or solar charger suits a 460Ah?
The battery accepts a nominal charge current of 150A and a maximum of 300A at 25C, so it will not be the limiting factor in almost any 12V build. A smaller 40A or 50A DC-DC charger works perfectly well - it simply takes longer to refill a bank this size, which is why most 460Ah builds pair a DC-DC charger with a solar array so the battery is being topped up while parked as well as while driving.
Does it come with a mounting tray?
Yes - a battery tray and straps are included. Position the tray with the straps underneath and not trapped under its feet, fasten it down with hardware suited to the surface, then seat the battery and secure the strap.
What is the difference between B-TEC Ultra and B-TEC Slim?
Ultra is IP67 rated and good for 6,000 cycles at 80% DOD, with a tray and straps included. Slim is IP52, rated to 2,500 cycles, and uses integrated mounting flanges with front-access terminals to fit tighter spaces. Ultra is the choice wherever the battery is exposed to weather, dust or vibration; Slim is for when space is the binding constraint.
What warranty does it come with?
Five years, backed by Enerdrive | Dometic's Australian technical support team. Charge the battery to 100% before first use so the internal and external monitors sync correctly.
Need less capacity? Compare the B-TEC ULTRA 200Ah from the same range.
