The 15 kW roof mount array at Coastal Carolina University in Conway is the smallest commercial solar South Carolina case study in our portfolio, and it is here for a reason. Small campus systems get built constantly, and the argument for them is not the one a savings calculator makes.
Fifteen kilowatts will not change a university's utility bill. Anyone who tells a facilities director otherwise is selling. What a system this size does is put a real, monitored, code-compliant photovoltaic installation on a campus where students, faculty and the facilities team can all reach it.
Why small campus systems still get built
Three reasons come up again and again, and none of them is payback.
Teaching. A working array produces live data from local weather on local equipment. Engineering, environmental science and trades programs use that in coursework in a way that a textbook example cannot match.
Visibility. An institution that has committed publicly to sustainability needs something on the ground. A visible array is evidence, and it is a great deal cheaper than a large system that only appears in a report.
A pilot before a larger commitment. Facilities teams learn what monitoring, maintenance, roof access and inverter servicing actually involve, at a scale where a mistake costs very little. Several of the larger institutional projects we have quoted started as somebody's small array.
What we built, and who engineered it
15 kW
Roof mount array
Demonstration scale, on campus.
SC-licensed PE
Stamped engineering
Chris Sandifer, PE in South Carolina.
Public procurement
Scope fixed before price
Bid against a published specification.
Our VP of Engineering, Chris Sandifer, is a Professional Engineer licensed in South Carolina, along with North Carolina, Florida, Georgia, Virginia and Texas, and a NABCEP board-certified photovoltaic system inspector. He has worked on medium- and high-voltage interconnections of renewable generators since 1992. For a public institution that has to defend an award, the qualifications behind the stamp are part of what is being bought.
Public procurement also changes the order of work. The specification is published first, bids are evaluated against it, and the award has to be justifiable afterwards. That rewards contractors who can put complete engineering and interconnection data on the table at bid stage, which is how we structure a commercial solar EPC contract regardless of system size.
Be honest about the economics at 15 kW
Design, permitting, interconnection, mobilization and inspection are mostly fixed costs. Spread across 15 kW they produce a higher cost per watt than they would on a large array, and the payback follows. If the objective is purely financial, build a bigger system or do not build one. If the objective is teaching, visibility or experience, this size is exactly right.
The results
OneWorld Solar has not published production or bill-savings figures for this installation. The scope described above is what the company confirms; anything beyond it should come from OneWorld Solar directly.
Where to go next
- Systems at every scale are collected in commercial solar projects.
- State context, including utilities and interconnection, is in commercial solar installation in South Carolina.
- For a larger campus example, see our 102 kW college campus solar installation in Orlando.
- Before sizing anything, check which commercial solar incentives apply to your institution, because a public or nonprofit entity's position differs from a taxable company's.