VMAX 12V 50Ah Group U1 Lithium Marine Battery

Product Description

Group U1 LiFePO4 Battery

The VMAX LFP1250M is a 12V 50Ah LiFePO4 Group U1 deep-cycle lithium battery designed for marine, off-grid solar, and energy-storage systems that need lasting, dependable power. A built-in Battery Management System protects against over-voltage, under-voltage, over-current, short circuit, and temperature extremes for safe, maintenance-free service. At only 10 pounds with a sealed IP67 waterproof case, it drops into many AGM or flooded Group U1 trays while cutting weight by more than half. Fast lithium charging, strong continuous output for inverters and DC loads, and series or parallel expansion make this compact pack an easy upgrade for boats, solar banks, mobility equipment, and backup power.

Features & Benefits

• IP67 Waterproof Rating – Sealed case resists rain, spray, and wet marine or outdoor conditions.
• Lightweight 10 lb Design – Far easier to lift and install than a comparable Group U1 AGM or flooded battery.
• Built-In BMS Protection – Over/under-voltage, over-current, short-circuit and temperature protections.
• Compact U1 Group Size – Group U1 footprint for drop-in lithium upgrades for many VRLA and AGM applications.
• Fast, Efficient Charging – The battery is optimized for LiFePO4 smart chargers and solar charge controllers.
• High Discharge Capability – Supports inverters and DC loads with up to 60 amps continuous output.
• Scalable System Design – Connect up to 4 in series (24/36/48V), or 4 in parallel (up to 200Ah).
• 7-Year Warranty – Backed by VMAX's industry leading customer service.

Why Choose VMAX Lithium Batteries?

The VMAX LFP series pairs high-grade LiFePO4 cells with an advanced Battery Management System (BMS) to deliver stable, maintenance-free deep-cycle power—year after year. The standardized group sizes simplify drop-in lithium upgrades where AGM or flooded batteries were previously used. With fast charging, high discharge capability and support for series & parallel banks, they scale easily from a single battery devices to multi-battery energy storage banks. Backed by a 7-Year Warranty and a 10-year design life for reliable power and excellent long-term value.

Bulk Pricing on VMAX LFP1250B Batteries

2-3 — $5.00 Off Each
4-8 — $10.00 Off Each
9+  — $15.00 Off Each

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VMAX LFP1250M Datasheet

VMAX LFP1250M Group U1 Cross-Reference

Group U1 Batteries with M5/M6 Insert Terminals: CB12350-IT, CBEV-U1-IT, CP12350I, CT1050, DCM0035, DURA12-35C, ES35-12FT, GP12350I, LC-XD1235PI, LCR12V35PI, LFP1250B, LFP1250M, MU-1 SLD M FT, MU-1 SLD M-33-FT, ML35-12INT, NP35-12I, PE12V35I, PK12350I, PS-12350 B, PS12350I, SCP12350 M6, SLA12-35I, SLAA12-35C, UB12350I, UB12350 TH, V35-857.

Group U1 Batteries with Nut & Bolt Terminals: 12N35-3B, 12V32-U1, 15020225, 1726-M8AU1, 50141, 6FM33, 8226, 8AU1, 8AU1H, 8GU1, 8GU1H, ABP A8AU1, AGM U1, AGMU1, AU1, AU1H, CA12350, CB-U1-AGM, CB12350-NB, CBEV-U1-NB, CP12350NB, DB8AU1, DC35-12, DCM0035NB, DURDC12-35J, DURG12-31J-A, EP V8AU1, ES33-12, ES35-12NB, ESU1, ESU1-35, ESU1H, EXP35, GP12350-NB, LCR12V35P-NB, ML35-12NB, MU-1 SLD A, MU-1 SLD G, MU-1 SLD M, MU-1 SLD M-33, NB12-35, NGU1, NP35-12NB, PDC-12350 NB3, PE12V35NB, PK12350-NB, PS-12350 NB, SCP12350 NB, SLADC12-35J, SLIAU1, SLIAU1H, SP-18, SP-30, SP-35, SP-40, U131AH, U1A-200, U1AGM, U1L-AGM-NB, U1RVS, UB12350-NB, WB1235.

Important: Always confirm your battery's dimensions, terminal configuration, and specifications before purchase to ensure proper fit and performance.

Warning: LiFePO4 charger required if upgrading from non-lithium batteries.

Recommended Chargers for the LFP1250M

VMAX 5A Lithium Battery Charger & Maintainer

VMAX 10A Lithium Battery Charger & Maintainer

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