Cable reels on solar and wind farm builds
Solar and wind farms empty large wooden reels of medium-voltage collection cable, usually 60 to 96 inch flanges, plus smaller reels of DC wire, control cable and fiber, and the empties gather in the project laydown yard when construction ends. We buy those reel lots at the site and sell graded reels to collection-system crews and operators who need to respool surplus cable or store spares.
What a renewable project runs on reels
A utility-scale solar or wind farm is a small distribution system built in a field. Strings of panels or individual turbines feed a medium-voltage collection system, usually aluminum underground cable run in trenches or plowed in, that brings power to a project substation. Alongside it run fiber for the SCADA and communications network, grounding conductor, control cable, and on solar sites a great deal of DC wire between the arrays and the inverters.
Almost all of it arrives on wooden reels. The collection cable comes on the biggest ones, because the project wants long continuous lengths between splices. The DC wire, control cable and fiber come on smaller reels. The Edison Electric Institute names electrification among the reasons its member utilities project more than $1.1 trillion of investment over 2025 to 2029 The Energy Information Administration reports $27.7 billion of utility transmission investment in 2023, the part of the grid that new generation has to reach.
Reel sizes for collection cable
Medium-voltage collection cable is tape or wire shielded, so under the NEMA WC 26 minimums Anixter reprints its drum must be 14 to 20 times the cable diameter. A 1.5 inch cable needs a drum of 21 to 30 inches, and a 2 inch cable 28 to 40 inches, which puts collection cable on reels from about 60 inches up. Okonite's table shows the weights those reels are built to carry: 7,000 lb of cable on the heavier 66x36x36, 8,000 lb on the heavier 72s, and up to 15,000 lb on the heavier 96x48x48.
| Size | Empty weight | Rated cable load | Approx. ft of 1.5 in cable | Source |
|---|---|---|---|---|
| 60x28x28 | 397 lb (Southwire A-62) | - | 1,738 ft | Southwire, Anixter |
| 66x36x36 | 292 or 400 lb | 4,500 or 7,000 lb | 2,415 ft | Okonite Tech 33 |
| 72x42x36 | 385 or 570 lb | 4,500 or 8,000 lb | 3,741 ft | Okonite Tech 33 |
| 78x48x42 | 471 or 762 lb | 4,500 or 12,000 lb | 4,779 ft | Okonite Tech 33 |
| 84x54x48 | 639 or 920 lb | 6,000 or 12,000 lb | 5,942 ft | Okonite Tech 33 |
| 96x48x48 | 758 or 1,078 lb | 6,000 or 15,000 lb | 8,099 ft | Okonite Tech 33 |
Footage is approximate, by the NEMA WC 26 formula Footage = 0.262 x T x (H - C) x (D + H - C) / d squared, with 3 inches of clearance. The reel's load rating may limit length first.
The laydown yard at the end of the job
On a renewable project, reels come in by the trailer early and go out as empties all at once at the end. Collection cable crews pull from reel trailers along the trenches, and the empties go back to the laydown yard, where they stand in rows on the gravel for weeks or months while the rest of the project is finished. By commissioning the yard may hold dozens of big reels in a few sizes, plus a scatter of smaller ones from DC and fiber work.
That is a better lot than most. Large numbers of a few sizes load efficiently, and a project with one cable spec often has one reel size. The catch is location. Wind and solar sites sit at the end of county roads in West Texas, the Plains and the desert Southwest, often hours from the nearest buyer, and the yard has to be cleared before the site is handed over.
Freight from a remote site
Big reels fill trailers by volume, not weight. Sonoco's EcoReel packing guide counts only 24 of its 66 inch reels, 22 of its 72s, 9 of its 84s and 8 of its 96s in a 53 ft van. Most project reels move on flatbeds or step decks anyway, because a laydown yard has a forklift or a telehandler and no dock, and the reels can be lifted on from the side and chained through their arbor holes. A 96 inch reel standing on a flatbed puts the load near 13 ft, so step decks are the safer choice for the largest ones.
With so few reels per trailer, the distance to a buyer matters more than anything else in the price. We look for buyers near the project: another site under construction in the region, a utility or co-op that needs reels for salvage, or a contractor who respools cable.
Grading reels that sat in the sun
Months outdoors on a sunny, windy site are hard on wood. Flanges dry and check, plywood delaminates after rain, and the lower edge of a reel that sat on wet ground softens. We grade project reels on the same points as any others, with extra attention to weather.
- Lower flange edge: soft or rotted wood where the reel touched the ground
- Flange checking: cracks across the grain that run from the rim toward the arbor hole
- Arbor hole: round, unsplit, and with its bushing or plate if it had one
- Staves: count the missing or broken; telehandler tines break them
- Plywood reels: delamination at the rim after rain
- Leftover cable, tape and pulling-eye hardware removed from the drum
What renewable crews and operators buy
Collection-system contractors finishing a project are often left with partial reels of cable. Respooling those onto a sound empty lets the cable be stored, moved to the next job or sold. Operations and maintenance teams keep spare lengths of collection cable and fiber for repairs after a fault or a dig-in, and need reels that will survive years in a storage yard. Repowering and retrofit work on older wind farms removes cable that has to be wound up for salvage.
We match these buyers to reels by drum first, so the cable's bend limit is met, then by footage, out-to-out width for the payoff equipment, and weight rating.
Clearing a project yard with us
- 01
Inventory by size
Count each size, flange x traverse x drum, and note the series or class if stenciled.
- 02
Mark the weather damage
Set aside reels with rotted lower flanges or split arbor holes.
- 03
Confirm site access
Gate hours, site safety orientation, a forklift or telehandler and operator, and whether a flatbed can turn around.
- 04
Agree the timing
Tell us the date the yard must be clear; remote lots need a little lead time to find a nearby buyer and a truck.
Questions people ask
What size reels does solar or wind collection cable come on?
Usually 60 to 96 inch flanges with large drums, because shielded medium-voltage cable needs a drum 14 to 20 times its diameter under NEMA WC 26; Okonite rates its heavier 96x48x48 for up to 15,000 lb of cable.
How many big reels fit on a truck?
Sonoco's guide counts 24 of its 66 inch reels, 22 of its 72s, 9 of its 84s and 8 of its 96s in a 53 ft van; at a project site most go on flatbeds or step decks.
Do you buy reels from remote project sites?
Yes. We quote the lot with the freight in it and look for a buyer near the site, because distance sets most of the price on large reels.
Are reels that sat outdoors still worth anything?
Often yes, if the arbor hole and flanges are sound. Soft lower flanges, split arbor holes and badly checked flanges lower the grade or end the reel's use.