
Why choose ZEM Marine Lithium Batteries?
1. Safe & Durable LiFePO₄Core
Adopts Lithium Iron Phosphate (LiFePO₄) chemistry: Non-toxic, non-explosive, and thermal runaway-proof, perfect for enclosed marine compartments
5000+ deep cycle life (4x longer than traditional lead-acid marine batteries)
IP67 waterproof & saltwater corrosion-resistant design: Withstands harsh marine environments (humidity, salt spray, vibration)
Stable performance in -20°C to 60°C (-4°F to 140°F): Adapts to tropical and temperate marine climates
2. Powerful Energy & Efficient Performance
Multiple voltage options (12V/24V/36V) to match different marine equipment (trolling motors, navigation systems, pumps)
High energy density: 4.6KWH/5.12KWH standard energy storage options, supporting long-time offshore operations
100% depth of discharge (DOD): Maximize energy utilization without residual waste
Solar-compatible: Works with marine solar panel kits (like 200W/390W systems) for renewable energy storage, reducing reliance on shore power
3. Low Maintenance & User-Friendly
Maintenance-free: No water refilling, no acid leakage, no harmful fumes (safe for indoor boat spaces)
Lightweight design: 60% lighter than lead-acid batteries, reducing boat load and improving maneuverability
Advanced BMS (Battery Management System): Real-time protection against overcharge, over-discharge, short circuit, and overheating
Fast charging: 80% charge in 1.5-2 hours (compatible with standard marine chargers and solar setups)
4. Cost-Effective & Eco-Friendly
5-7 year lifespan (vs. 1-2 years for lead-acid batteries): Lower total cost of ownership
Lead-free, mercury-free, and recyclable: Complies with global marine environmental standards (UN38.3, CE, FCC)
Low self-discharge rate (<3%/month): Holds charge for months during off-season storage
Hot Products
1. 51.2V50Ah EM4850 Lithium battery system for vessels
Our Lithium-ion batteries combine outstanding energy density and with highest level of safety, presenting the highest standards for the ship batteries.
Description
ELECTRICAL SPECIFICATIONS
Rated Capacity | 50Ah |
Rated Voltage | 51.2V |
Energy | 2560Wh |
Type of cell | LFP |
CHARGE & DISCHARGE SPECIFICATIONS
System charging termination voltage | 57.6V |
System discharging termination voltage | 41.6V |
Maximum sustainable charging current | 50A |
Maximum sustainable discharge current | 80A |
TEMPERATURE SPECIFICATIONS
Charging temperature range | 0~55℃ |
Discharging temperature range | - 20 ~55℃ |
Storage temperature | -20~60℃ |
2. 51.2V80Ah EM4880 Lithium battery system for vessels
Our Lithium-ion batteries combine outstanding energy density and with highest level of safety, presenting the highest standards for the ship batteries.
Description
ELECTRICAL SPECIFICATIONS
Rated Capacity | 80Ah |
Rated Voltage | 51.2V |
Energy | 4096Wh |
Type of cell | LFP |
CHARGE & DISCHARGE SPECIFICATIONS
System charging termination voltage | 57.6V |
System discharging termination voltage | 41.6V |
Maximum sustainable charging current | 80A |
Maximum sustainable discharge current | 100A |
TEMPERATURE SPECIFICATIONS
Charging temperature range | 0~55℃ |
Discharging temperature range | - 20 ~55℃ |
Storage temperature | -20~60℃ |
3. 51.2V 100Ah EM48100 Lithium battery system for vessels
Our Lithium-ion batteries combine outstanding energy density and with highest level of safety, presenting the highest standards for the ship batteries.
Description
ELECTRICAL SPECIFICATIONS
Rated Capacity | 100Ah |
Rated Voltage | 51.2V |
Energy | 5120Wh |
Type of cell | LFP |
CHARGE & DISCHARGE SPECIFICATIONS
System charging termination voltage | 57.6V |
System discharging termination voltage | 41.6V |
Maximum sustainable charging current | 100A |
Maximum sustainable discharge current | 150A |
TEMPERATURE SPECIFICATIONS
Charging temperature range | 0~55℃ |
Discharging temperature range | - 20 ~55℃ |
Storage temperature | -20~60℃ |

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