What Sailing Boat Battery Covers
Every kilogram affects sail efficiency and speed. Daily power needs are smaller (nav + comms + LED + electric winches, 3-8kWh/day), but charging options are limited — mainly solar + wind + engine alternator. Lead-acid weight + poor charge acceptance severely limits range and sailing performance. PLB, founded 2014, sailing LiFePO₄ weighs 1/4 of lead-acid with 3× faster charge acceptance — perfect for solar + wind charging. <3%/month self-discharge for long-term mooring. Exported to 100+ countries.
Professional Battery Solutions
500kg Every Extra Kilo Hurts Sail Efficiency — 500kg Lead-Acid Is Too Heavy
30-40ft sailing yachts carry 200–400Ah lead-acid batteries weighing 200–350kg at the lowest point (for CG). Performance impact: increased righting moment during heel reduces speed 0.3-0.5 knots, especially upwind. Racing skipper: "Lead-acid is my heaviest 'crew member' that contributes nothing."
150–270kg reduction = +0.3-0.5 knots. Better race results, improved cruising. PLB LL-MARINE24100-SAIL, 12V/24V 100–200Ah, only 50–80kg. Keep low mounting for CG advantage. BMS with Bluetooth, real-time monitoring via phone app.
| Lead-acid | PLB sail | |
|---|---|---|
| Battery weight | 200–350 kg | 50–80 kg |
| Speed impact | −0.3 to 0.5 knot | Baseline |
| Upwind performance | Noticeably reduced | Improved |
| Charge monitoring | Voltmeter, inaccurate | Bluetooth app, precise |
8 2.5 Solar Charging: Lead-Acid 8 Hours vs Lithium 2.5 Hours
The pain is specific: 8 2.5 Solar Charging: Lead-Acid 8 Hours vs Lithium 2.5 Hours In daily operation, lead-acid or manually managed packs lose capacity between scheduled checks, maintenance teams cannot inspect every unit, and the failure surfaces only when the load is already at risk.
Full charge from one day of solar — worry-free for long-term mooring. PLB's LiFePO₄ pack and BMS monitor cell voltage, temperature and SOC continuously, alert before a weak cell becomes a failure, and are sized to the application's load profile.
| Conventional / manual | PLB LiFePO₄ | |
|---|---|---|
| Monitoring | Periodic checks | Continuous BMS |
| Fault warning | At failure | Threshold alerts |
| Maintenance | Scheduled visits | Exception-based |
| Service life | 2–3 years | 6,000+ cycles |
3 3-Month Mooring Return — Lead-Acid Totally Discharged, Dead
Sailing owners travel or winter-moor for 3–6 months. Lead-acid self-discharge 5-15%/month — after 3 months, fully depleted, sulfation begins. Return to find 0V, charger shows "battery fault." ¥3–8K lead-acid group is dead. Worse — sulfation crystals are irreversible; even if charged, only 20-30% original capacity remains.
Half a year away, charge still there — ready to sail on return. PLB self-discharge <3%/month — 90%+ remaining after 3 months. BMS ultra-low-power sleep mode, quiescent <0.1mA. No maintenance charger needed, no battery removal. Return to dock and sail away. 3.
| Lead-acid | PLB sail | |
|---|---|---|
| Charge after 3 months moored | 0–25%, sulphated | Over 90% |
| Usable after 6 months | Likely scrap | Ready to use |
| Maintenance charger needed | Yes | No |
| Removing batteries for winter | Recommended | Not needed |
Solution Advantages
Ultra-Light
A quarter of the lead-acid weight
An in-house lightweight structure with high-density cells keeps the same capacity at a quarter of the weight. Removed kilos translate directly into speed and race results.
One quarter the weight · 150–270 kg removed · +0.3 to 0.5 knotSolar-Ready
Three times the charge acceptance
Constant-current acceptance to 95% makes solar charging three times more effective than lead-acid, with MPPT compatibility for genuine solar independence.
Constant current to 95% · Double the daily harvest · MPPT compatibleLow Self-Discharge
Under 3% a month, sail away anytime
Self-discharge below 3% a month plus a BMS sleep mode leaves over 90% after six months moored — no maintenance charger and no battery removal.
Under 3%/month · BMS sleep below 0.1 mA · Six months moored, ready to sailBluetooth Monitoring
Real-time status on your phone
A built-in Bluetooth module shows state of charge, temperature and charge/discharge status in the app, so battery health is visible at any point of the passage.
Bluetooth 5.0 · Live app data · Charge, temperature and healthFrom Selection to After-Sales — PLB Stays With You
Four commitments that apply to every page in this category, from the first technical question to long-term support.
Technical Selection Support
Engineer recommends within 24 hours
Tell us the vessel type, daily consumption and engine-room conditions — our engineers size the system and recommend the matching model within 24 hours.
Dedicated technical team · 24-hour response
OEM / ODM Customization
From cell to cabinet, fully customizable
From cells, BMS, housing and terminals to the nameplate, everything can be customized.
4–8 week customization · Tooling development supported
Global Shipping
Export to 100+ countries
Export-compliant packaging with UN 38.3 air transport certification and worldwide delivery.
UN 38.3 certified · MSDS available · Export compliant
Warranty & Support
Standard warranty, lifetime support
Standard products carry a full warranty, backed by lifetime technical support.
Warranty terms on request · Lifetime technical supportWhy Choose PLB?
Years of Manufacturing
Founded in Dongguan, China in 2014
Countries Served
Export-compliant packaging and worldwide delivery
Voltage Platforms
From 25.6V to 512V, built on the same cell platform
After-Sales Rate
Monitored by the internal quality traceability system
Full Range & Model Selection
Complete product range and model selection — fishing and workboat packs, lightweight sailing batteries, high-capacity cargo and ferry systems plus sealed buoy and USV versions.
| Model | Voltage | Capacity | Protection | Applications |
|---|---|---|---|---|
| LL-MARINE48200 | 48V | 200Ah | IP67, 316L terminals | Fishing boats · workboats |
| LL-MARINE48200-YT | 48V | 200Ah | 1.5 h fast charge | Yachts · leisure craft |
| LL-MARINE24100-SAIL | 24V | 100Ah | Lightest option, BT monitor | Sailing · racing |
| LL-MARINE48500-CARGO | 48V | 500Ah | 200kWh systems, DNV/BV/LR | Cargo · ferry · port |
| LL-MARINE48100-USV | 48V | 100Ah | Navigation-linked BMS | USV · unmanned craft |
| LL-MARINE12100-BUOY | 12V | 100Ah | Sealed, buoy-mounted | Offshore platforms · buoys |
By vessel: fishing boat or workboat → LL-MARINE48200.
By duty: 24-hour attractor lights or winches → 48V 200Ah.
Not sure? Send us the vessel type, daily consumption and engine-room conditions — our engineers will size the system directly.
Frequently Asked Questions
The questions boat builders, yards and fleet operators ask most about LiFePO₄ marine banks in the Sailing scenario — 10-year (service life), and what it takes to qualify.
What has to change on the vessel before a LiFePO₄ pack goes into the Sailing scenario?
The bank keeps the vessel DC voltage and footprint, with marine terminals and a BMS configured for the existing charge sources. Typical models for Sailing builds are LL-MARINE24100-SAIL.
Does output stay flat through a whole Sailing mission?
A 48 V 200 Ah pack weighs about a quarter of the equivalent lead-acid bank, and 6,000 cycles give a ten-year service life.
How is the pack sealed and thermally managed in Sailing duty?
IP67 sealed construction with marine-grade terminals resists salt spray and engine-room heat, and the BMS cuts off above its rated temperature. Endurance: 10-year (service life).
Is a special charger needed in the Sailing scenario?
Three-way charge management covers shore power, generator and solar, and charge acceptance is about three times that of lead-acid.
What warranty and after-sales support apply in the Sailing scenario?
Standard products carry a full warranty backed by lifetime technical support, with terms confirmed on the quotation; export packing is UN 38.3-certified with MSDS. Tell us the vessel type, daily consumption and engine-room conditions — our engineers size the system and recommend the matching model within 24 hours.
Need a Selection Recommendation?
Tell us the load, backup time and installation space — our engineers will recommend the matching battery within 24 hours.
NDA available upon request · Typical response within 12 hours