Sell Surplus Wire From California Solar Projects

We are solar project surplus wire buyers for California EPCs, developers and installers with cable left after construction. We review unused PV reels, feeder stock, grounding wire and collection cable, plus separately identified scrap copper. Tell us what remains on site and when the project needs its storage area cleared.

Solar project surplus wire buyers need the full cable schedule

A solar lot is rarely described well by 'solar cable' alone. Utility-scale sites can have DC string conductors, large home-runs and AC collection cable in the same laydown yard. Commercial rooftops, residential installations and solar-plus-storage projects may leave different mixes and shorter remnants.

The EIA's June 2026 CAISO report puts utility-scale solar capacity at 25 GW in April 2026. That is CAISO utility-scale capacity, not all California rooftop and utility PV combined. It indicates the scale of this project sector, not the volume of surplus available to sell.

Our seller guidance hub covers other sources of wire. For a solar closeout, start with the cable schedule and match each offered reel to the actual remaining inventory.

Separate string wire, home-runs and AC collection cable

Common PV string leftovers include red and black 10 or 12 AWG copper reels. Larger copper and aluminum conductors can appear in home-runs and collector circuits. Record the metal explicitly; a large black single conductor is not enough to identify the product.

The PV wire product page explains UL 4703 identification and the 600 V, 1000 V and 2000 V ratings encountered. A 2000 V product mark is not a statement that the project operates at that voltage. Likewise, USE-2 lettering alone does not establish PV Wire certification.

List aluminum home-runs and feeders separately from copper. Preserve the exact size, including large sizes such as 500 kcmil (MCM), rather than estimating from outside diameter. Insulation thickness and compact stranding can change the finished dimensions.

Treat collection reels as a documented specialty lot

A 34.5 kV solar collection system may use cable marked for the 35 kV class. The system description and cable rating are different information. Manufacturer solar and wind cable specifications describe 35 kV MV cable carrying power from collection points toward a substation.

For medium-voltage surplus, include copper or aluminum, EPR or TR-XLPE insulation, and the stated insulation level. Copper tape shields and concentric neutral wires represent different constructions. A generic 'MV reel' description misses details that can determine whether another project has a use for it.

Keep factory test reports and manufacturing information associated with the individual reel. Show intact end caps, damaged ends and signs of moisture honestly. A clean outer jacket does not establish internal condition, and buyers or end users must verify suitability for any proposed installation.

Resolve the EPC release before the laydown yard closes

Overestimated quantities, changed designs, canceled scope and remaining ordered lengths can all create solar project surplus. A battery-storage package may also leave AC feeders, control cable or grounding stock. Identify each product by its markings instead of assuming all cable from the combined project has one rating.

Before offering the lot, ask who owns the balance: the EPC, developer, project owner or another contractor. Gather purchase records and a written disposition approval naming the party authorized to sell. Keep retained operating spares out of the surplus list.

Agency or regulated-utility ownership can trigger additional certification requirements for covered material. Project invoices support the history but do not replace a required agency letter. These provenance notes summarize the issue and are not legal advice.

Tell us when the laydown lease ends, when loading equipment leaves and whether removal depends on a site release. Those may be different dates. We can plan around disclosed constraints without promising that an unreviewed lot will leave on a particular day.

What to send for a solar closeout offer

Use the project inventory sheet if you already have one, adding current condition and footage. Send:

• A reel schedule with project reel ID, manufacturer SKU and quantity.
• PV labels showing wire type, actual voltage, AWG or kcmil, and copper or aluminum.
• An indication of factory-full, partial, cut-length or previously installed condition for each item.
• Complete MV legends, insulation levels, end-cap photos and available factory test documents.
• Separate grounding and tray-cable descriptions instead of one miscellaneous weight line.
• EPC purchase documentation and the owner's written release where needed.
• The California site city, laydown closing date and equipment availability.
• Photos showing reel flanges, yard access and the location of the approved inventory.

Mark estimated footage as estimated. Endpoint numbers can support a continuous-length check, but a single visible number does not universally mean feet remaining.

Preserve grounding, tray cable and the scrap separation

Unused bare copper grounding reels need their tags because there is no jacket legend to identify temper and stranding. Keep solid, stranded and tinned products distinct. Copper-clad materials should not be described as solid copper.

For tray cable left from equipment connections, list conductor sizes and count, grounds, shielding and the marked TC or TC-ER designation. Exact construction matters more than the fact that it came from a renewable project. Do not combine these reels with short PV offcuts under one total-footage figure.

Copper cutoffs can be reviewed as scrap without sacrificing identifiable unused reels. Keep aluminum scraps out of copper bins, and describe removed cable separately. Original manufacturing value, useful length and traceability can matter more than metal weight for reusable inventory.

Coordinate removal without losing reel identity

Assign the loading contact a final list of released reels and their yard positions. Report gross weights where known, reel dimensions and any damaged packaging before selecting handling equipment. Follow the manufacturers' reel-handling requirements rather than relying on visual fullness to estimate a load.

Our Central Valley wire buying information is relevant to California solar sellers in that region. We also arrange pickups elsewhere in the state. The offer and payment terms are confirmed in writing before pickup, with the removal schedule discussed against the project's actual access window.