What Offshore Buoy Battery Covers
100K+ buoys globally, growing 15% annually. Core pain: battery is the only power source (solar + battery), must survive 7-14 consecutive overcast days. Lead-acid sea life only 1–2 years; each battery swap requires chartered workboat (¥50–150K/trip), maintenance costs far exceeding battery cost. PLB, founded 2014, buoy-specific LiFePO₄: 10-year design life, <3%/month self-discharge, IP68 for long-term seawater immersion. 14+ days continuous overcast power. 10-year zero maintenance — from "annual sea trips for battery swaps" to "install and forget."
Professional Battery Solutions
14 = 14 Consecutive Overcast Days — Buoy Goes Dark = Ocean Data Chain Break
Ocean buoys consume 500-2000Wh/day (met sensors + CTD + GPS + satellite comms). Typhoon/plum rain seasons bring 7-14 consecutive overcast days with near-zero solar. Degraded lead-acid depletes in 5-7 overcast days — buoy dark = total ocean data interruption. Weather agencies, shipping companies, fisheries all impacted. Data chain break liability far exceeds battery cost.
Zero ocean data interruption — 365-day continuous operation. PLB LL-MARINE12100-BUOY, 12V 100Ah=1.2kWh. Supports 100% DoD (deep discharge doesn't damage cells), 14-day overcast reliable supply. ≥80% capacity retention over 10 years — degradation doesn't reduce overcast capability.
| Lead-acid | PLB buoy | |
|---|---|---|
| Days of supply in overcast weather | 5–7 | 14 or more |
| Capacity at 10 years | Below 50% | 80% or more |
| Deep-discharge damage | Severe sulphation | None, 100% DOD supported |
| Ocean data outages | Yearly | Zero |
¥10 Workboat Charter ¥100K Per Buoy Battery Swap — Unaffordable
The pain is specific: ¥10 Workboat Charter ¥100K Per Buoy Battery Swap — Unaffordable 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.
10-year zero maintenance = ¥250K-1.2M workboat savings. 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 |
Buoy Battery in Seawater — Lead-Acid Terminals Corrode in 6 Months
Large ocean buoy bottom compartments may experience wave splash or seal failure causing flooding — batteries submerged in seawater long-term. Lead-acid lead terminals fully corrode and break within 6–12 months = circuit break = buoy dark. Even with waterproof battery compartments, salt spray penetration causes slow oxidation; 2–3 years of increased contact resistance affects power supply.
10-year seawater immersion without terminal failure — extreme environment reliability. PLB LL-MARINE12100-BUOY with titanium alloy terminals + IP68 full potting. Terminals don't corrode after 10 years in seawater. Even with complete compartment flooding, battery continues operating. Passed 500-hour salt spray + 1000-hour seawater immersion testing.
| Lead-acid | PLB buoy | |
|---|---|---|
| Terminals | Lead, corrodes | Titanium alloy |
| Seawater immersion life | 6–12 months | 10 years or more |
| Protection class | IP67, not submersible | IP68, submersible |
| After water ingress | Open circuit, failure | Keeps supplying power |
Solution Advantages
10-Year Zero Maint
Install and forget forever
A ten-year design life with 6,000 cycles and under 3% monthly self-discharge turns annual buoy swaps into install-and-forget, saving ¥250,000–1.2M.
Ten years without replacement · 6,000 cycles · ¥250,000–1.2M savedIP68 Submersible
Titanium terminals, 10-year immersion
Titanium terminals with full IP68 potting resist seawater for ten years, and the pack keeps supplying power even if the battery compartment floods.
Titanium terminals · IP68 potted · 1,000 h seawater immersion passed14-Day Overcast
100% DoD, no damage
100% depth of discharge without damage supports 14 consecutive overcast days and still holds 80% or more of capacity at ten years.
100% DOD without damage · 14 days of supply · 80%+ at ten yearsGlobal Deploy
100+ countries, extreme proven
Already deployed in Arctic, tropical and open-ocean conditions, with extreme-duty validation across more than 100 countries.
Arctic to tropical · 100+ countries validated · ReliableFrom 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 Offshore & Buoys scenario — ≥80% (capacity at 10 years), and what it takes to qualify.
Which pack fits the Offshore & Buoys vessel already in service?
The bank keeps the vessel DC voltage and footprint, with marine terminals and a BMS configured for the existing charge sources. Typical models for Offshore & Buoys builds are LL-MARINE12100-BUOY.
How much usable capacity does the pack deliver across a mission in Offshore & Buoys service?
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.
Will the pack survive Offshore & Buoys conditions for its full service life?
IP67 sealed construction with marine-grade terminals resists salt spray and engine-room heat, and the BMS cuts off above its rated temperature. Endurance: ≥80% (capacity at 10 years).
How does the pack connect to the charger and control system in the Offshore & Buoys scenario?
The BMS reports SOC, voltage, current and temperature, and CAN or RS485 is available where the vessel bus requires it.
Can the pack be customized for the Offshore & Buoys application and certification file?
Cells, BMS, housing, terminals and nameplate are customizable. Custom packs take 4–8 weeks including tooling. 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