How Far Can a Solar Farm Be From a Substation?

Most published guides give the same short answer. A utility-scale solar farm wants to sit within about 2 miles of the substation it connects to. Roughly 5 miles is the outer edge most site screens allow. Community solar and other distribution-scale projects need to be much closer to power, usually within 1,000 feet to 1 mile of a three-phase line.

There's no physical limit. The limit is cost. One landowner guide puts a gen-tie line at about $1 million per mile, paid by the developer, and every mile of it crosses land that someone else owns.

So the distance question turns into a counting question. Draw the circle around a substation that can still take your megawatts, take out what can't be built on, and count the owners left. The number is smaller than most parcel lists suggest, and that changes how you should treat every owner on it.

The distance rules of thumb, by project type

The pages ranking for this question mostly agree, even though most of them were written for landowners.

• Utility-scale, to a substation: YSG Solar calls about 2 miles the ideal range and says the longer the distance, the greater the risk. Transect's land guide uses roughly 5 miles or less.
• Utility-scale, tapping a transmission line: YSG says within 1 mile of transmission lines. SolarLandLease and Scout Land Consultants both say these projects tap lines of 69 kV or higher.
• Community solar and distributed generation: YSG says within 1,000 feet of three-phase power. Transect recommends about 0.2 miles. SolarLandLease and Scout both say within one mile, and SolarLandLease adds "preferably much less."

No utility enforces any of these. They mark the point where the project math starts to bend. A 2-mile site and a 5-mile site can both get built. One of them pays for three more miles of line.

What each extra mile costs you

Unless the site touches the substation, you build a gen-tie, a dedicated line from the project to the point of interconnection. SolarLandLease puts that at approximately $1 million per mile and notes the developer almost always pays it. Your own figure moves with voltage, terrain and who builds it. The direction doesn't.

The money is only half of it. YSG says developers want "a clear path to run power lines from the site to the point of interconnection," with easements across any parcels in between. RENEW Wisconsin notes that developers lease extra land beyond the arrays for "routing interconnection corridors."

That makes distance a second contact problem. A site next to the fence needs one owner to sign. A site four miles out needs its own owner plus every owner along the route to grant an easement. One owner on that route who never answers can stall a site whose lease is already signed.

Distance is the easy part. Capacity decides the rest.

A substation down the road doesn't mean that substation can take your project. SolarLandLease says the equipment "may not have enough capacity," and some substations need upgrades before anything new can connect. YSG describes its own screen as a substation with the right feeders and "a proper MVA capacity."

That's where projects actually die. In 2022, Berkeley Lab published a review of interconnection cost estimates in MISO. Projects that completed their studies averaged $102 per kW. Projects that later withdrew had been facing $452 per kW in recent years, and 85% of that was network upgrades. The local equipment at the point of interconnection was a small part of the bill: $46 per kW for completed projects, $67 for withdrawn ones.

Berkeley Lab's queue study shows the same thing across the country. Of the projects that asked to connect between 2000 and 2020, about 19% were running by the end of 2025. By capacity it was 13%, and 75% had withdrawn.

Put those together and the useful question is how far a site can be from a substation that still has room. Far fewer substations pass that test, and your team spent real money and months of studies finding out which ones do.

Draw the circle and count what's left

Run the geometry on a substation you'd actually build at.

A circle with a 1-mile radius holds about 2,000 acres. At 2 miles, about 8,000. Felt's siting guide says utility-scale solar needs five to seven acres per megawatt. So a 100 MW project wants something like 500 to 700 acres, in one block or a few that touch.

Now take out what can't be used. That means roads and houses, wetlands and woods, and the substation itself. It means ground another developer already holds under option, and parcels too small or oddly shaped to string together. Near a good substation, what's left is often a short list of owners your team could name by parcel number.

You aren't the only one who drew that circle. Felt sells GIS teams the ability to "surface parcels near substations" by typing a question. Every developer with a parcel layer and a substation map is looking at the same farms. The owners near a substation with room are getting letters from more than one company.

The owner you can't reach is the site you can't replace

On a county-wide solar list, a missed owner hurts but doesn't sink you. There's another farm down the road.

Near a substation, there often isn't. If the owner of the right parcel never reads your letter, the fallback is the next parcel out. That means more line at roughly a million a mile, more easement owners on the route, and a site your engineers already ranked lower. Or it means a different substation, with its own capacity question and its own place in the queue.

Storage is tighter still. A battery site often needs only a few acres right by the fence, which puts storage letters on business lots, church land and heirs' parcels. We covered what those owners ask in what landowners ask about battery storage leases, and the siting side in BESS site selection criteria.

And the land near substations is often the land mail misses. Think of parcels at the edge of town, by an old plant or an industrial yard. They tend to sit in an LLC whose mail goes to a registered agent. Or the heirs live in another state, or the county record still shows an old address. Finding the person behind an LLC is its own job. Each of those owners is on your list. None of them has read a word you sent.

Treat the short list differently

A short list near a good substation is the opposite of a county mailer. You don't need more parcels. You need every owner on the few you have.

That means working out who can actually sign before the letter goes. The person behind the LLC. The heir who inherited the farm. The address they live at now, not the one on the tax roll. It means following up with the owners who stay quiet, because one silence on this list costs more than a hundred on a county list. And it means the owner who answers hears from your team the same day, before the next developer's letter arrives.

That's the part we do. We contact the owners on the parcel list your team already built and find who can sign. We follow up until they answer, and pass the ones who want to talk to your team in seconds. Your team takes the call and signs the lease.

On one campaign for a developer in Georgia, 1 in 9 parcels wanted to talk about a lease once their owners were reached that way. Across six campaigns, 214 parcels did.

If there's a substation your team has already picked, send us the parcels around it and we'll walk you through how we'd get to each owner on that list.