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HelioVolta report: Quality issues raise solar system’s LCOE by 20%

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HelioVolta report: Quality issues raise solar system’s LCOE by 20%

HelioVolta today published its fourth annual “SolarGrade PV Health Report,” assessing quality and workmanship across 1,500+ solar assets in the United States that were inspected by HelioVolta’s field engineers.

This year’s report is built on the revamped HelioVolta Quality Standard (HQS), a proprietary rubric that starts every project at 1,000 points and deducts points based on the number, severity and remediation status of quality issues documented by HelioVolta. Scores translate to an A through F letter-grade that the report ties directly to lifetime energy costs.

“Quality in solar is no longer a matter of opinion; it’s a number you can put in a contract,” commented David Penalva, co-founder and CEO of HelioVolta. “This year’s report proves that excellent workmanship is empirical, not subjective, and the projects from Onyx Renewables and Greenskies Clean Energy show exactly what quality looks like.”

“Our modeling reveals that the gap between an A-rated and an F-rated PV system can raise the levelized cost of energy by more than 20%,” noted James Nagel, co-founder and CTO of HelioVolta. “That’s the difference between a profitable asset and one stranded by expiring tax credits. Asset owners who tolerate aggressive EPC cost-cutting can no longer operate profitable portfolios.”

For the first time, the report also recognizes excellence through the inaugural HelioVolta Quality Standard Awards, honoring the two highest-scoring projects under 5 MW inspected in 2025:

“Not all energy is delivered equal. Our customers need solar that is engineered, inspected, and validated to perform,” said Angie Daoud, COO of Onyx Renewables.


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