DIY Solar Carport: What You Can Build and What You Are Not Allowed To

The honest version of this project has a bright line running through the middle of it, and knowing where the line sits is worth more than any parts list.

You can build the structure. You almost certainly cannot legally wire the array.

That is not a warning about difficulty. Plenty of capable people could physically terminate PV conductors correctly. It is a statement about licensing, and it holds whether or not you are good with your hands.

Which half is yours

Yours, in most jurisdictions: siting, footings and foundations, erecting the structure, assembling the frame, fastening the roof, and mounting the modules mechanically. This is carpentry and steel work. It is permitted, it is inspected, and it is legal for a homeowner to do on their own property in most of the country.

Not yours, in most states: DC wiring from the modules, combiner and disconnect work, the inverter connection, anything at the service panel, grounding and bonding of the array, and the utility interconnection agreement.

Texas is a useful example because it is unusually explicit. There is no state solar contractor license at all. The PV work instead requires a Texas Electrical Contractor License, and contractors performing it must employ Texas licensed electricians for wiring, inverters, service panel connections, and interconnection. A company may legally sell you a solar system in Texas without any license and still not be permitted to install it.

Your state’s rules will differ in the details. What rarely differs is that the electrical half is a licensed trade and the structural half is not. Check your own state before you plan around this.

Going off grid does not change the law

A common piece of internet advice is that an off grid array avoids all of this because it never touches the utility.

It avoids the interconnection agreement. That is the only thing it avoids.

The electrical code still applies. The permit still applies. The inspection still applies. A 48 volt battery bank capable of delivering hundreds of amps into a short is not made safe by being disconnected from the grid, and an inspector will look at exactly the same things. Islanding your system changes who you have to negotiate with, not whether the work is regulated.

The structural caveat, again

If you are attaching an array to a carport you bought as a vehicle shelter, read the caveat in the kits guide properly, because it is the highest consequence thing on this page.

An ordinary carport’s wind and snow ratings assume an empty roof. Adding modules changes the permanent dead load, changes how wind lifts the roof plane, and concentrates force at every clamp. Have a licensed engineer review the structure before you load it. Your building department will very likely require a stamped drawing for a permanent structure carrying PV anyway, so this is usually not optional even if you were inclined to skip it.

Purpose built structures exist precisely so you do not have to have this conversation. Chiko’s carports are rated to 150 and 185 MPH wind with UL 2703 certification because they were designed around modules from the start. The price premium over a cedar carport is, in large part, that engineering.

What DIY actually saves

Turnkey solar carports run about $3.62 per watt installed as of July 2026. Building the structure yourself and paying an electrician for the electrical labor only can undercut that, and on a small system it very often does not.

Work it out before you commit. That per watt figure comes from an average system of 9.7 kilowatts, and a structure costs roughly the same whether you hang 12 panels on it or 40. Put a small array on a purpose built carport and the parts alone can exceed the turnkey price of the finished job, as the worked example in the kits guide shows. The saving is real on a big array and imaginary on a small one.

What it does not do is beat a rooftop array at $2.60 per watt, because the structure still costs what it costs whoever assembles it. DIY narrows the carport premium. It does not erase it.

And it will not be offset by a tax credit. The Residential Clean Energy Credit under section 25D applied to property installed through December 31, 2025, and the IRS states it is not available for anything placed in service after that. A 2026 build, professional or DIY, gets nothing federally. Check your state and utility programs separately, because those run on their own schedules.

A sane sequence

1. Confirm your state’s licensing split and your jurisdiction’s permit requirements before you buy anything.
2. Get a structural engineer’s opinion if you are loading a structure not rated for PV, or buy one that is.
3. Size the array first, not the structure. The sizing calculator gets you a real number to design around.
4. Buy listed equipment. UL 1741 on the inverter, UL 1973 and UL 9540A on any battery. Unlisted gear is cheaper right up until plan review.
5. Line up your electrician before the structure goes up, not after. Their schedule, not yours, sets the finish date.
6. Build the structure. Mount the modules. Stop there.
7. Hand it to the electrician for everything downstream of the modules.

That sequence is the whole trick. The people who get burned on this project are not the ones who could not swing a hammer. They are the ones who found out at inspection which half of the job was never theirs.

For what the finished thing costs either way, see the cost guide. If the structure is going against the house rather than out on the driveway, the pergola comparison is probably the more useful page.