Floating photovoltaic projects place cables in conditions that can differ significantly from ground-mounted solar installations. Water exposure, floating-platform movement and difficult maintenance access all deserve attention before procurement.
On 4 November 2026, pv magazine Australia reported that Canopy Power Australia and Floating Solutions Consulting had partnered with an aim to deploy more than 50 MW of floating solar across Australia within three years. For buyers evaluating similar projects, this is a useful reminder to define cable installation conditions early.
Effective FPV cable selection starts with two questions: where will the cable operate, and what evidence supports its suitability for that location?
1. Define the Installation Position and Water Exposure
“Suitable for floating solar” is too broad for an RFQ. A cable secured above the water on a float has a different exposure profile from a cable that is repeatedly submerged.
Divide the cable route into clearly defined sections.
| Installation position | Information buyers should provide |
|---|---|
| On floating platforms | Sunlight exposure, mounting method, clearance above water and splash conditions |
| Between floating platforms | Relative movement, unsupported length, bending and abrasion risks |
| Floating array to shore | Water-level changes, platform displacement and cable support arrangement |
| Any submerged section | Water type, depth, temperature, immersion duration and operating conditions |
Distinguish occasional splashing, temporary immersion and continuous immersion. If submersion is possible during storms or changes in reservoir level, include that condition in the specification.
RFQ wording: “Please confirm suitability for each defined installation zone and identify the supporting test evidence, installation limits and exclusions.”
2. Separate Freshwater, Saline Water and Salt Mist
A freshwater reservoir, an industrial pond and a coastal site should not share an identical environmental specification.
Provide available information on water chemistry, salinity, temperature and relevant contaminants. For coastal locations, identify airborne salt exposure even if the floating array sits on freshwater.
Salt-mist testing and immersion testing address different exposures. A salt-mist report should not be treated as proof of continuous seawater suitability.
TÜV Rheinland identifies humidity, temperature, UV exposure, wind and water conditions as relevant stresses for floating PV components. Its certification services include additional testing for floating applications.
When reviewing solar cable water resistance, ask which water conditions were tested and how closely they represent the intended site.
3. Specify Movement and Bending Requirements
A flexible cable is not automatically qualified for repeated movement.
Floating platforms can move relative to one another and to the shoreline. The cable arrangement must accommodate the expected displacement without excessive tension, tight bends or rubbing against structural edges.
Ask the project designer to define:
- Expected movement at cable attachment points.
- Minimum installation and operating bend radii.
- Support spacing and strain-relief locations.
- Potential abrasion and pinch points.
- Whether repeated bending or torsion requires validation.
If dynamic testing is required, agree on the movement profile, bend radius, cycle count, temperature and acceptance criteria. A static bend-radius value alone does not demonstrate repeated-flexing performance.
For a floating solar cable, review both the product specification and the proposed routing arrangement.
4. Review Connectors and Joints Separately
Cable qualification does not automatically establish the suitability of the completed extension lead or harness.
Identify every connector, splice, branch joint and enclosure along the route. Confirm the exact mating components, permitted cable diameter, conductor size, sealing arrangement and assembly instructions.
Keep connections above water where the approved system design allows. Where immersion cannot be avoided, obtain evidence that the complete connection arrangement is suitable for the specified conditions.
An IP rating should be reviewed together with its stated test conditions and installation instructions. It does not, by itself, establish suitability for every depth, duration, water chemistry or movement profile.
For custom floating PV wiring, request an assembly drawing showing connector positions, branch lengths, supports and strain relief.
5. Check What the Certificate and Report Actually Cover
A certificate title or test photograph is only a starting point. Buyers need to connect the evidence to the product being quoted.
Check:
- Certificate holder, issuing body and certificate status.
- Product designation and applicable specification edition.
- Covered conductor sizes, materials and insulation or sheath construction.
- Report identification and tested sample details.
- Exposure conditions, test duration and acceptance criteria.
- Any limitations or differences from the proposed product.
Where a certificate covers a product family, ask how the quoted variant falls within that scope.
A report for cable alone should not be presented as qualification of a finished harness. Similarly, a material test does not automatically establish complete cable or assembly performance.
RFQ wording: “Please provide a document list linking each proposed product to the applicable certificate and test report, with any differences or coverage limitations clearly identified.”
Build the Purchase Specification Around the Site
Before ordering, prepare a short application profile covering the cable route, water exposure, environmental conditions, movement and connection arrangement. Use it to review the supplier’s evidence and resolve gaps before production.
When discussing floating PV cables, photovoltaic extension leads or custom harnesses with Winpower, share this profile together with the electrical requirements and drawings. Confirm which valid documents cover the proposed configuration and agree on any additional verification needed.
The objective is a cable and connection system supported by evidence that matches its actual installation conditions.
Post time: Nov-06-2026