Boats punish batteries with splash, vibration and deep discharge — EGbatt builds sealed LiFePO4 marine banks that shrug those off and outlast the flooded cells they replace.

Overview

EGbatt marine batteries are 12V/24V LiFePO4 packs in sealed, splash- and vibration-rated enclosures for house banks and, where rated, starting duty. LiFePO4’s flat discharge curve means you get usable voltage down to a deeper state of charge than lead-acid, and it weighs a fraction — a real benefit for trim and payload. As with all LFP drops-ins, the charger and alternator regulator need an LiFePO4 profile, and we spec that alongside the battery.

Key specifications

SpecificationValueWhy it matters Voltage12.8V / 25.6VHouse and starting banks. EnclosureSealed, splash/vibration ratedMarine duty. Capacity100Ah typicalDeep usable DoD. BMSIntegrated, marine-ratedFull protection. Weight≈1/4 of lead-acidTrim and payload.

Typical applications

  • House bank: Lights, fridge, electronics.
  • Trolling motor: Deep-cycle power.
  • Electronics: Stable voltage to low DoD.
  • Sail and power boats: Drop-in replacement.

How to specify & buying guide

  • Use a marine/alternator charger with an LiFePO4 profile; a lead-acid alternator regulator can overcharge.
  • Specify starting vs deep-cycle duty — they have different C-rate needs.
  • Confirm the enclosure IP rating for its location (cockpit vs bilge).
  • Size Ah from house load ÷ voltage at 80–90% DoD.

Engineering & manufacturing at EGbatt

Portable and specialty packs are built for shock, dust and temperature swing. We select cells and BMS for high-discharge and fast-recharge profiles, seal the enclosure to the right IP rating, and validate the pack through drop, vibration and thermal cycling.

Certifications & compliance

  • UN38.3 — Mandatory lithium battery transport test (altitude, thermal, vibration, shock, external short). Required for any cross-border shipment.
  • IEC62619 — International safety standard for industrial Li-ion cells and batteries; expected by EU and most APAC buyers.
  • CE — EU declaration of conformity for the applicable directives.
  • RoHS — Restriction of hazardous substances in the battery and BMS.
  • IP67 — Dust-tight and immersion resistant up to 1 m — for harsh mobile or marine use.

Frequently asked questions

Can it start the engine?

Deep-cycle house banks differ from starting; tell us the cranking amps and we spec accordingly.

Is it safe near water?

Sealed, IP-rated enclosure; LiFePO4 is the safe chemistry.

Will my alternator charge it?

Only with an LiFePO4-compatible regulator; we spec the charging side.

How much lighter than lead-acid?

Roughly a quarter the weight for the same capacity.

Related products & resources

  • RV Batteries
  • Trolling Motor Batteries
  • 12V LiFePO4

More in this series

  • Lithium Battery Products
  • LiFePO4 Cells
  • Cylindrical Lithium Cells
  • LiFePO4 Battery Modules
  • LiFePO4 Battery Management Systems (BMS)
  • Sodium-Ion Batteries
  • 12V LiFePO4 Batteries
  • 24V LiFePO4 Batteries
  • 48V LiFePO4 Batteries
  • Residential Energy Storage Systems
  • Commercial & Industrial Energy Storage
  • Containerised BESS
  • Portable Power Stations
  • RV Lithium Batteries
  • Golf Cart Lithium Batteries
  • Deep Cycle LiFePO4 Batteries
  • Trolling Motor Lithium Batteries
  • Forklift Lithium Batteries
  • Self-Heating LiFePO4 Batteries
  • Low Temperature Lithium Batteries
  • Hybrid Inverters
  • Inverter Chargers
  • MPPT Solar Charge Controllers

Request a quote

Send us your voltage, capacity, dimensions, certification target and annual volume. Our engineering team returns a proposal within three working days. Start your RFQ or review our custom pack capabilities.

Request a LiFePO4 quote

Tell us your product, volume and specs — our engineering team returns a proposal within three working days.

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