The 12V 100Ah LiFePO4 Marine Solar Battery is a deep-cycle lithium iron phosphate battery optimized for marine and solar applications. It provides stable 12.8V output, 1280Wh energy storage, and integrates a built-in 100A BMS for overcharge/discharge protection. With 4,500–15,000 deep cycles, it supports trolling motors, navigation systems, and solar setups. Its IP65 waterproof design and ≤8.8kg weight make it ideal for boats/RVs. Pro Tip: Use solar-compatible MPPT controllers to maximize charge efficiency and lifespan.
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What are the core features of a 12V 100Ah LiFePO4 marine battery?
Designed for harsh marine environments, these batteries combine Grade A LiFePO4 cells with vibration-resistant casings. They deliver 100Ah capacity at 12.8V with ±1% voltage stability. The integrated BMS prevents thermal runaway and balances cells during solar charging. Real-world example: A 100Ah unit can power a 50W marine fridge for 24 hours while maintaining 80% depth of discharge.
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How does it integrate with solar systems?
These batteries accept 0.2C–0.5C solar charge currents (20–50A for 100Ah). Their low self-discharge (3% monthly vs 30% in lead-acid) suits intermittent solar charging. Pro Tip: Pair with 200W solar panels—a 100Ah battery needs ≈5 hours at 40A charging to refill from 20% SOC.
| Parameter | LiFePO4 | Lead-Acid |
|---|---|---|
| Cycle Life | 4,500+ | 500 |
| Weight | 8.8kg | 28kg |
| Efficiency | 95% | 75% |
What marine applications does it support?
Ideal for trolling motors (24V systems via series connection), fishfinders, and bilge pumps. A 100Ah model runs a 30lb-thrust motor for 4–6 hours. Unlike AGM batteries, LiFePO4 maintains stable voltage under heavy loads, preventing electronics reset during engine starts.
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How does temperature affect performance?
Operational range spans -20°C to 60°C, but charging below 0°C requires low-temp cutoffs. Built-in BMS adjusts charge rates by temperature—at -10°C, charging current halts to prevent lithium plating. Pro Tip: Install in insulated battery boxes if operating in subzero climates.
| Condition | Capacity Retention |
|---|---|
| 25°C | 100% |
| 40°C | 98% |
| -20°C | 85% |
What safety mechanisms are included?
Multi-layer protection includes cell-level fusing, gas venting, and BMS-controlled current limits. During short circuits, the BMS disconnects in <50ms. For example, marine salt spray tests show 1,000hrs exposure without terminal corrosion—vital for coastal operations.
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FAQs
Only use LiFePO4-compatible chargers—lead-acid profiles overcharge beyond 14.6V, triggering BMS protection cycles.
Why choose LiFePO4 over AGM for solar boats?
LiFePO4 offers 5x faster solar recharge rates and 3x lighter weight—critical when every kg impacts fuel efficiency.
Is parallel connection safe for higher capacity?
Yes, but use identical batteries with <1% voltage difference. Imbalanced packs cause premature BMS shutdowns.
