BLUETTI B4810 LiFePO4 Battery | 51.2V | 100Ah | 5120Wh
Overview
The BLUETTI B4810 is a 51.2V 100Ah deep-cycle battery built for the 48V systems in motorhomes, caravans, boats and off-grid cabins. It packs 5120Wh into a single slim unit that bolts down flat, with terminal connections made for permanent installs rather than grab-and-go use. Its LiFePO4 chemistry is rated for 6000 charge cycles at 70% capacity, so it is built to cycle every day for years.
One battery is rarely the end of the story. The B4810 expands in parallel, up to 24 units and 122.88kWh. The Ethernet cable in the box carries the communication link between batteries; the power cables that join the terminals are not included. It charges at up to 100A, discharges at up to 100A with a 200A peak for surge loads, and its IP65 casing and built-in self-heating handle wet lockers and cold mornings. If you're unsure how it fits your system, we're happy to help before you buy.
B4810 Specs:
- Capacity: 5120 Wh (51.2 V, 100 Ah)
- Type: LiFePO4 (Lithium Iron Phosphate)
- Life Cycles: 6000 Cycles @ 70% Capacity
- Charge Current: 50 A (Recommended) 100A Max.
- Discharge Current: 100A Max.
- Peak Discharge Current: 200A @ 30s
- Cell Temperature Protection: pauses charging below -1°C or above 61°C, and discharging below -21°C or above 61°C
- Net Weight: 46 kg
- Dimensions (L × W × H): 608 × 380 × 145mm
- IP Rating: IP65
- Max. Expansion (Parallel & Series): 122.88 kWh (24P), 51.2 V, 2400 Ah
- Discharging Temperature: -20°C to 55°C
- Certification: MSDS, UN38.3, FCC, CE, RoHS, UL
What's in the Box?
- B4810 LiFePO4 Battery x 1
- Ethernet Cable x 1
- M8×20 Bolt (for locking cables) x 2
- M5×10 Bolt x 8
- M8×20 Bolt x 12
- M8×30 Bolt x 2
- M8×1.4 Flat Washer x 2
- M8 Spring Washer x 2
- M12×12 Headless Bolt x 2
- M8 Nut x 2
- Mounting Bracket x 4
- ST8 Wood Screw x 8
- User Manual & Warranty Card x 1
- Download the BLUETTI B4810 user manual (PDF)
- Warranty: 5 years
Note: The B4810 is a standalone deep-cycle battery with bolt terminals, not a plug-in expansion pack. Hosts such as the RV5 power hub, and any connection cables, are sold separately.
Grows With Your System
A single B4810 runs a weekend; a bank of them runs a home on wheels. Up to 24 units connect in parallel for 122.88kWh of storage at 51.2V. The included Ethernet cable links each battery's communication ports to the next; the power cables that join the terminals are not included, so plan those with the rest of the installation. The runtime figures below are BLUETTI's own estimates of what one battery supports.
Tough Where Batteries Live
Battery lockers are wet, cold and bumpy. The B4810 carries an IP65 rating against dust and water jets, protection cutoffs that pause charging or discharging outside safe cell temperatures, and built-in self-heating so cold mornings do not lock it out. At 46kg and just 145mm tall, it sits low and flat, right where a vehicle or boat wants its weight.
Consistent Power, Even in the Cold
Cold weather is where batteries usually struggle. With a steady power input connected, the B4810's built-in self-heating film activates when temperatures fall below 0°C and holds the cells at an ideal 25°C, protecting both performance and lifespan. Charging carries on through frosty mornings without manual warming.
Monitor Your Power With Ease
The BLUETTI app puts the battery's numbers in one place: state of charge, voltage, temperature, and the time remaining to full charge or empty. A glance at your phone tells you whether the bank is ready for the trip, without opening the battery locker.
Quick Recharge, Flexible Charging
Charging fits around the trip rather than the other way round. The B4810 takes up to 100A of charge current, with 50A recommended for everyday use, and it takes that charge from a wall outlet, solar panels or a generator through the system it is wired into. The banner below shows the maker's charge-time comparison against a lead-acid bank of the same capacity.
Which Battery Fits Your System?
The B4810 is the 48V member of BLUETTI's deep-cycle family. The comparison below sets it beside the 12.8V B1232 and B1210, so you can check voltage, capacity and weight against what your system needs.
Pairs Well With
The B4810 is the battery behind BLUETTI's 48V RV system. It pairs with the BLUETTI RV5 power hub, which runs from a 48V battery bank and connects to the B4810 with the RV5-to-B4810 connection cable, sold separately. As your storage needs grow, add more B4810 units in parallel. If you're planning a caravan, boat or cabin system and want to check the fit, we're happy to help before you buy.
Frequently Asked Questions
What is the B4810 built for?
The B4810 is a 51.2V 100Ah deep-cycle battery, 5120Wh in a single unit, built for 48V systems: motorhome and caravan main power, boats, off-grid cabins and home backup. It is the battery BLUETTI's 48V RV systems are designed around, and its bolt terminals suit permanent installs rather than portable use.
Can I connect more than one B4810 together?
Yes. The B4810 expands in parallel with more B4810 units, up to 24 in total for a maximum of 122.88kWh at 51.2V. The Ethernet cable in the box carries the communication link between batteries; the power cables that join the terminals are not included. If you're unsure what your bank needs, we're happy to help before you buy.
Which BLUETTI systems is the B4810 designed for?
The B4810 is the battery behind BLUETTI's 48V RV system: it pairs with the BLUETTI RV5 power hub, connecting to the RV5's battery terminal with the RV5-to-B4810 connection cable, sold separately. If you're planning a different setup, we're happy to help before you buy.
Does the B4810 work in cold weather?
Yes. The B4810 has built-in self-heating: when it is cold, the battery warms its own cells automatically while a charging source is connected, so it can charge safely in low temperatures without manual intervention. If you're planning a cold-climate or alpine install, we're happy to help before you buy.
How fast does the B4810 charge?
The B4810 accepts up to 100A of charge current, with 50A recommended for everyday charging. At its full charging rate a 100Ah battery is back to work far sooner than an equivalent lead-acid bank, and charging can come from shore power, solar or your vehicle depending on the system it is wired into.
How much load can the B4810 handle?
The B4810 delivers up to 100A of continuous discharge current at 51.2V, with a 200A peak for up to 30 seconds to cover motor start-ups and surge loads. What that runs in practice depends on the inverter or hub it feeds, so size the whole system, not just the battery.