Guangdong Heidler Technology Co., Ltd , https://www.hyhemit.com
Technical due diligence is a critical factor in the success of solar projects across commercial, industrial, and utility-scale applications. Large photovoltaic (PV) systems represent significant capital investments with long operational lifespans—often 30 years or more. If these systems fail to perform reliably or as expected, project financiers, owners, and developers risk lower returns on their investments.
Mitigating risks over the lifespan of a PV system goes beyond just meeting minimum requirements. As a consulting engineer working with project owners and lenders, Pure Power has reviewed numerous underperforming or troubled solar assets that met code standards. These experiences have shown us that while code compliance is necessary, it is not sufficient for ensuring long-term success. It's just the starting point—not the end goal.
**Understanding Code Compliance**
Like any electrical or structural system, PV installations are governed by specific codes such as the National Electrical Code (NEC) or the International Building Code (IBC). Meeting these requirements is essential for permits, inspections, and limiting liability. However, code compliance alone does not guarantee quality, reliability, performance, or longevity.
At its core, codes are based on past failures—especially those that have led to loss of life, property damage, or major insured losses. The code-making process involves subject matter experts who develop consensus-based standards to prevent such incidents. But this focus on safety doesn't necessarily address issues like efficiency, ease of maintenance, or long-term durability.
The NEC itself states in section 90.1(A):
> “The purpose of this Code is the practical safeguarding of persons and property from hazards arising from the use of electricity.â€
And in 90.1(B), it adds:
> “Compliance with this Code and proper maintenance result in an installation that is essentially free from hazard but not necessarily efficient, convenient, or adequate for good service…â€
This distinction is key. For a PV plant to deliver strong investment returns, it must be efficient, easy to maintain, and built to last.
**Code Editions and Adoption Lag**
It’s also important to recognize that code development often lags behind technological progress. While new editions of the NEC and IBC are released every three years, adoption at the state or local level can vary widely. Some jurisdictions adopt new codes immediately, while others may enforce outdated versions for years. This inconsistency can lead to systems that meet legal requirements but lack modern design and performance considerations.
In some cases, the gap between code updates and equipment advancements may even restrict the use of the latest technology, making it harder to achieve optimal performance.
**Understanding Best Practices**
Best practices go beyond legal requirements and are based on proven methods, materials, and experience that lead to better outcomes. They help stakeholders make informed decisions based on metrics like efficiency, reliability, and longevity. While best practices can vary depending on business goals, many are universally applicable.
**Performance Matters**
A PV system must operate efficiently and remain available to deliver returns. Simply meeting code requirements won’t prevent equipment failure, installation errors, or design flaws. For example, inverter placement and selection in high-temperature environments can affect performance. Poorly sized conductors may cause voltage drop, leading to nuisance tripping. Best practices help avoid such risks.
**Climate and Location Matter**
PV systems must be designed to withstand environmental challenges like seismic activity, coastal winds, snow, frost, and UV exposure. Codes may not account for all location-specific risks, so best practices ensure systems are resilient and reliable over their entire lifespan.
**Installation and O&M Matter**
Ease of installation and maintenance is crucial. A poorly designed system can be costly to service, leading to inefficiencies. Aggregating inverters into clusters, for instance, reduces downtime and improves access. Small design changes, like flexible conduit provisions, can save time and money during operations.
At Pure Power, we bring extensive expertise to every project, ensuring your PV and energy storage systems are safe, reliable, efficient, and profitable for the long term.