Victron Energy Lithium NG Batteries (LiFePO4) - 12.8V, 25.6V & 51.2V

Victron’s digitally integrated LiFePO4 platform. Built to scale — up to 50 batteries on a single bank.

If you’re building a serious lithium system — a bluewater yacht with redundant inverters, an off-grid home running induction cooking, a fleet electrification project — the older Smart Lithium line eventually hits a wall. Wire, fuse, and configure each battery individually. Monitor each one separately. Watch the install drawing grow. The Lithium NG is what Victron built to solve that. Every cell is monitored at the battery itself; every battery in the bank talks to every other battery and to a single system BMS over a high-speed digital bus. Same LiFePO4 chemistry, same long cycle life — dramatically cleaner install, far better scalability.

What lives in the battery, and what you pair with it

The Lithium NG includes an integrated shunt, cell voltage and temperature monitoring, and an automatic cell balancer. Battery voltage, current, temperature, and state-of-charge all stream from the battery to the BMS over a 50 cm M8 digital communication cable. No external battery monitor required — the shunt is inside.

What sits outside the battery is a system BMS, and Victron requires one. The main NG datasheet specifies the Lynx Smart BMS NG (500 A or 1000 A) as the headline pairing. Victron also makes lighter BMS modules for installs that don’t need a contactor:

• Lynx Smart BMS NG. The default pick. 500 A or 1000 A safety contactor disconnects the entire system on alarm and doubles as the main on/off switch. VE.Can communication, NMEA 2000, ATC alternator-temperature mode (no separate alternator protector needed), firmware-updatable. M10 busbars. The right choice for yachts, expedition vehicles, RVs, and any professional install.
• VE.Bus BMS NG. Lighter-weight alternative for 12/24/48 V systems with a MultiPlus, Quattro, or similar VE.Bus inverter/charger plus a GX device. Supports DVCC for system-level coordination, but uses load/charge disconnect outputs rather than a contactor.
• SmallBMS NG. For 12/24/48 V systems without an inverter/charger — lighting, electronics, solar, DC loads. The lightweight pick for vans and small off-grid setups.

Not sure which BMS your install calls for? Email us with your inverter, GX device, and whether you’re running an alternator — we’ll spec it with you in a phone call.

Why teams choose the NG over the older Smart Lithium

• Digital communication between batteries. Up to 50 batteries in parallel on 12 V or 24 V systems (192 kWh and 384 kWh max respectively), or up to 25 batteries on 48 V systems (128 kWh max). The bank acts as a single logical battery to the BMS. Up to 5 BMS units can be paralleled for even larger installations.
• Integrated battery monitor. The shunt is inside the battery. No separate SmartShunt or BMV required for state-of-charge.
• 92% round-trip efficiency. Less energy wasted between charge and discharge than most competitive LFPs.
• Long-haul cycle life. 2,500 cycles to 80% capacity at 80% DoD — or 5,000 cycles if you keep the bank to 50% DoD. Under 1% capacity loss per 100 cycles in lab testing.
• IP65 sealed. Dust-tight and water-jet rated. Suitable for engine compartments, exposed lockers, and outdoor enclosures.
• Repairable. Cover removes with screws — one of the few lithium batteries that isn’t a sealed black box. Service rather than landfill.
• Mounting brackets included. Can be mounted upright or on its side (terminals must not face down). Quick install on flat or angled surfaces.

Choose your battery

Model	Voltage	Capacity	Energy	Max continuous (charge / discharge)	Weight
LFP12,8/100	12.8 V	100 Ah	1,280 Wh	100 A / 100 A	9 kg (19.8 lb)
LFP12,8/150	12.8 V	150 Ah	1,920 Wh	150 A / 150 A	14 kg (30.9 lb)
LFP12,8/200	12.8 V	200 Ah	2,560 Wh	200 A / 200 A	19 kg (41.9 lb)
LFP12,8/300	12.8 V	300 Ah	3,840 Wh	300 A / 300 A	29 kg (63.9 lb)
LFP25,6/100	25.6 V	100 Ah	2,560 Wh	100 A / 100 A	19 kg (41.9 lb)
LFP25,6/200	25.6 V	200 Ah	5,120 Wh	200 A / 200 A	37 kg (81.6 lb)
LFP25,6/300	25.6 V	300 Ah	7,680 Wh	300 A / 300 A	52 kg (114.6 lb)
LFP51,2/100	51.2 V	100 Ah	5,120 Wh	100 A / 100 A	37 kg (81.6 lb)

Plain-English picks:

• 12.8 V / 100–200 Ah — standard house bank for cruising sailboats 28–38 ft and mid-sized RVs.
• 12.8 V / 300 Ah or parallel 200 Ah pairs — for boats running a watermaker, induction cooking, or air conditioning at anchor.
• 25.6 V banks — larger systems where DC cable losses matter (expedition vehicles, larger RVs, electric propulsion auxiliary banks).
• 51.2 V / 100 Ah — bluewater yachts running 48 V systems, off-grid homes with induction cooking and large solar arrays, and any install pairing with a Quattro 48/5000 or larger. Parallel multiple units for capacity.

Shared specs

Spec	Detail
Chemistry	LiFePO4 (lithium iron phosphate)
Cycle life	2,500 cycles at 80% DoD · 3,000 at 70% DoD · 5,000 at 50% DoD (to 80% remaining capacity)
Round-trip efficiency	92%
Self-discharge	≤ 3% per month at 25°C
Charge voltage	14.0–14.4 V / 28.0–28.8 V / 56.0–56.8 V
Float voltage	13.5 V / 27 V / 54 V
Discharge temperature	−20°C to +50°C (−4°F to 122°F)
Charge temperature	+5°C to +50°C (41°F to 122°F) — BMS locks out charging below 41°F
Storage temperature	−45°C to +70°C
Protection class	IP65 (dust-tight, water-jet rated)
Communication	Digital M8 between batteries; daisy-chain to BMS
BMS thresholds (cell level)	Pre-alarm <3.0 V · Load disconnect <2.8 V · Charge stop >3.6 V
Terminals	M8 (threaded inserts and bolts)
Mounting	Brackets included; upright or on side (not with terminals down)
Repairable	Yes — cover removable with screws
Certifications	UL1973, UL9540A, IEC62619 (cells); ECE R10-6 automotive; EN 61000-6-3/-2 EMC
Warranty	3 years from date of purchase (Victron limited warranty on lithium batteries; max 42 months from Victron invoice date). Proof of correct battery usage required for warranty claims.

What's in the box

Lithium NG battery, mounting brackets, terminal covers, and a 50 cm M8 battery-to-BMS communication cable. Not included: Lynx Smart BMS NG (or VE.Bus / SmallBMS NG), DC battery cables, fuse and fuse holder, M8 extension cables if the BMS isn’t within 50 cm, and a GX device for monitoring. We sell all of these — email us your bank configuration and we’ll spec gauges, fuse ratings, and cable lengths.

Pair with

• Lynx Smart BMS NG 500 A or 1000 A — required for most installs; specified in the Victron NG datasheet.
• Cerbo GX MK2 or Ekrano GX — required for VE.Bus BMS NG and Lynx Smart BMS NG installs. Lets the system read actual SoC and coordinate behavior via DVCC.
• MultiPlus-II, Quattro, or Phoenix inverter — sized to your bank voltage; configure for the appropriate lithium profile in VictronConnect.
• SmartSolar MPPT — sized to your solar array.
• M8 extension cables — available in 1, 2, 3, 4, and 5 m lengths when the BMS isn’t mounted within 50 cm of the battery bank.
• Lynx Distributor — for clean fused DC distribution; the Lynx Smart BMS NG can monitor up to four Distributor modules.

FAQs

Q: Do I really need a separate BMS? I thought the NG had one built in.
The cell-level protection — balancer, cell voltage and temperature monitoring, state-of-charge calculation — is inside the battery. But the system BMS is what disconnects loads or charge sources during an alarm and what talks to the rest of your Victron stack. Victron explicitly lists the BMS as mandatory and sold separately. The Lynx Smart BMS NG is the default pairing in the Victron datasheet; the VE.Bus BMS NG and SmallBMS NG are lighter alternatives for specific install types.

Q: How many batteries can I parallel?
Up to 50 batteries on 12 V or 24 V systems (a max bank size of 192 kWh and 384 kWh respectively). Up to 25 batteries on 48 V systems (128 kWh max). Up to 5 BMS units can themselves be paralleled for installations beyond a single BMS’s capacity.

Q: What about cold-weather charging? I’m on a boat in the Pacific Northwest.
This is the most important spec to internalize. The Lithium NG charges from +5°C to +50°C (41°F to 122°F). Below 41°F the BMS locks out charging entirely — not a derating, a hard stop. For unheated boats at the dock through a Seattle winter, or any rig that sees freezing nights, you have three options: (1) add battery-compartment heating, (2) choose a heated alternative like the Epoch V2 Elite, or (3) accept that solar and shore charging will only work above 41°F. Email us if you’re planning a four-season install — we’ll spec it correctly.

Q: Can I mix Lithium NG with my existing Smart Lithium batteries?
No. The NG and older Smart Lithium use different BMS architectures and can’t share a bank. If you’re expanding an existing bank, add NG-with-NG. If you’re mid-refit and unsure how to handle the transition, email a tech — we’ll plan the migration with you.

Q: What happens if a cell goes out of spec?
The BMS sees it first. A pre-alarm fires when any cell drops below 3.0 V or rises above 3.6 V. If the condition continues — cell voltage below 2.8 V or out-of-range temperature — the BMS disconnects loads or stops charging via its “load disconnect” and “charge disconnect” outputs (SmallBMS NG, VE.Bus BMS NG) or opens the 500 A/1000 A safety contactor (Lynx Smart BMS NG).

Q: How does the Lynx Smart BMS NG handle my alternator?
ATC mode (Alternator Temperature Control) is built in. The BMS protects your alternator from overheating during high-charge events without needing a separate device. One of the reasons it’s the default pick for cruising sailboats and expedition vehicles with engine charging.

Q: Can I mount the battery on its side?
Yes — but not with the terminals facing down. Upright or on the side with terminals up or out are both fine.

Q: What’s the warranty?
Victron warrants lithium batteries for 3 years from the date of purchase by the original end-user (with a 42-month maximum from the Victron invoice date). This is shorter than Victron’s 5-year warranty on power products like inverters and chargers, and the 10-year extension that’s available on those products does not apply to lithium batteries. Warranty claims require proof of correct battery usage — charge profile, temperature, and depth-of-discharge within spec. Damage from reversed polarity, mechanical shock, liquid contact, lightning, or undertightened terminals is excluded. Full terms: Victron’s 2025 Limited Warranty Policy.

The lithium platform that scales with the install

If you’re building a real lithium system — not dropping a single battery into an existing AGM hole — the NG is the platform Victron designed for it. Modular BMS that fits your architecture. A bank you can extend to 50 batteries over time. One digital bus tying it all together. And it’s a battery you can actually service when something goes wrong, instead of throw out.

Speccing a new install or planning a refit? Email support@bluemarine.com with your system summary or schedule a free consult — we’ll size the battery, the BMS, the cables, and the fuses together. We do this every day.