As the world looks for innovative renewable energy solutions, fishery–photovoltaic (PV) complementarity projects have emerged as a breakthrough. By combining solar power generation above water with aquaculture below, these projects achieve dual land-use efficiency and maximize environmental and economic benefits.
Yet, behind the iconic rows of floating solar panels lies a silent hero: the PV cable system. Acting as the nervous system of floating PV power plants, cables ensure that every unit of electricity generated reaches the grid reliably and safely.
Why PV Cables Matter in Floating Solar Projects
Floating PV projects, such as the 39MW fishery-PV station in Shandong, China, face unique challenges. Unlike ground-mounted installations, cables here must perform under conditions of high humidity, continuous UV exposure, salt mist, and potential chemical corrosion from aquaculture activities.
This makes cable quality critical—not just for system efficiency, but also for long-term safety and reliability.
Key Technical Requirements of PV Cables
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High Voltage Capacity
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Modern utility-scale PV plants operate up to 1500V DC.
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Cables must safely handle this load without breakdown.
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Optimal Cross-Sections
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Typical sizes include 4mm², 6mm², and 10mm², chosen based on current, length of string runs, and power demands.
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Durable Insulation & Sheath
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Cross-linked polyolefin (XLPO) or XLPE insulation ensures excellent electrical performance.
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Double-layer insulation structure provides enhanced safety.
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Environmental Resistance
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UV resistance prevents cracking under strong sunlight reflection on water.
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Moisture and water resistance ensures consistent operation in damp conditions.
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Salt-mist and ammonia resistance protect against corrosion from fishpond environments.
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Industry-Standard PV Cable Models
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EN 50618 H1Z2Z2-K: Flame-retardant, halogen-free, and designed for long-term outdoor PV use.
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TÜV PV1-F: German-certified standard, offering excellent flexibility and weather resistance.
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Compliance with IEC & TÜV standards guarantees performance and international acceptance.
These cables are not just “wires”—they are engineered components tailored to the demanding requirements of renewable energy projects.
Design and Installation in Fishery-PV Stations
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Cable Routing: Often installed on floating pontoons or elevated racks to keep them above water.
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Mechanical Protection: Armored cables or protective conduits reduce risks from fishery equipment or maintenance.
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Waterproof Connections: Special junction boxes, connectors, and gel-filled terminations enhance safety.
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Maintenance Protocols: Regular inspections for cracks, water ingress, and connector integrity ensure uninterrupted power delivery.
Case Reference: The 39MW Shandong Fishery-PV Project
This landmark project deployed:
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79,748 solar modules connected via kilometers of high-performance PV cable.
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DC cables (4–6mm²) for module strings, and 10mm² cables for longer runs to combiner boxes.
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Robust environmental protection against UV, water, and chemical exposure.
The project not only supplies 37.5 million kWh annually but also sets a benchmark for sustainable floating PV station design.
Conclusion: Reliable Cables, Reliable Power
In floating PV projects, cables are the unsung backbone—responsible for system safety, efficiency, and durability. As demand for fishery-PV complementarity grows, cable technology will continue to evolve, with innovations such as anti-rodent, anti-biofouling coatings, and halogen-free materials shaping the next generation of floating solar solutions.
By choosing the right cables, developers ensure that clean energy flows smoothly from sunlight to grid—empowering both aquaculture and renewable power.
Winpower Cable is a provider of connection solutions for the new energy system.
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Post time: Sep-23-2025