Once a façade bay is closed, a PV connector can be difficult to reach. An extension lead that fits the drawing may also be too short once it follows the installed supports and bends. Before ordering cables, the façade engineer and solar EPC should agree on where each run goes, how it will be secured and how it can be replaced.
Two recent developments illustrate the range of façade PV applications. In Germany, pv magazine reported that Solarwatt recommends its latest Construct-series module for applications including façades. In Venezuela, Fundelec installed a vertical PV array on a building in Caracas. The published images do not establish whether the modules also serve a building-envelope function, so the Caracas project is best described as a façade PV installation. IEC 63092-2 describes BIPV systems as those in which the integrated PV modules are used as building products.
1. Split the Cable Route into Three Zones
Mark the full BIPV wiring route on the coordinated façade and electrical drawings. Assign an ID to each run and show where it moves from one installation zone to another.
| Route zone | What to confirm before requesting a quotation |
|---|---|
| Exposed façade exterior | Sun and weather exposure, support points, movement allowances and protection from sharp edges |
| Curtain-wall cavity | Clearances behind modules, support locations, access for installation and any restrictions at cavity barriers |
| Wall penetration | Opening size, wall construction, cable bundle dimensions and required sealing or firestop details |
Give the supplier the electrical specification and conditions for each segment. For a solar façade cable that passes through multiple zones, ask the design team to confirm which requirements apply along the full route and where any transition is permitted.
2. Put Connectors Where the Service Team Can Reach Them
Show connector positions on the façade drawing and confirm access with the modules and panels installed. For each connection, record the exact mating part numbers, the space needed to operate the release mechanism and the panel or access opening the technician will use.
Review the replacement sequence while the layout is still editable. If a connector sits behind a panel that cannot be removed independently, the façade team should resolve the access detail before the EPC approves the harness length.
3. Agree on Finished Lengths, Fixings and Replacement Paths
Measure the route along its supports, including bends, entry points and the slack needed for termination and servicing. For each PV cable harness, specify the finished length, measurement reference points, tolerance, branch positions, connector orientation and end labels.
Check that the proposed clips or supports suit both the cable and the façade. Also check whether a factory-fitted connector can pass through the smallest opening on the installation and replacement paths. If it cannot, resolve the opening, assembly sequence or termination method before releasing the order.
For repeated façade bays, trial-fit one representative assembly with the actual supports, access opening and connection points before releasing the full batch.
4. Request Separate Evidence for the Cable and the Penetration
Ask the project team to identify the requirements that apply at the installation location. Where the specification calls for particular electrical or reaction-to-fire documentation, check that the records cover the quoted cable designation and construction. For a building-integrated photovoltaics cable, record which route segments those documents are intended to cover.
Review the penetration detail separately. Where a fire-rated wall is crossed, ask the responsible designer to verify the proposed wall construction, opening, cable or bundle configuration and sealing system against the applicable firestop documentation. Agree on who will provide the approved detail, installation instructions and inspection records.
What to Include in the RFQ
Send the cable supplier the marked-up façade route, electrical ratings, cable and harness schedule, connector part numbers, and fixing and access details. List the documents needed for approval and delivery, with an owner and due date for each.
For PV cables, prefabricated extension leads or custom solar harnesses, share this package with Winpower before ordering. Flag any provisional dimensions or unresolved penetration details so the quotation identifies which items can be released for production and which still need project approval.
Post time: Nov-10-2026