Quality

HelioVolta analysis says bad wiring and connections are the most common source of significant problems.

With the early expiration of key US solar tax credits in 2026 and 2027, solar developers from the United States and Europe are looking to diversify, and the Asia-Pacific (APAC) region represents attractive prospects for many. But unpredictable site conditions can defy even the most experienced developers’ assumptions, causing delays and cost hikes. Upfront due diligence is vital, argue Clean Energy Associates engineers Nicholas Hudson and Evan Woolard.

Sandia National Labs researchers have created a new dataset on the rates and types of rooftop PV connector failures. Their analysis has shown that tight wire bending radius, extra dirty connectors, and loose nuts are the most common failure causes in 6,276 connectors deployed between 2014 and 2017 across seven U.S. regions.

A new test curve for determining solar panels’ breaking point from hail uses a broader spectrum of impact energies and testing products.

The National Renewable Energy Laboratory and Sandia National Labs have created a new nomenclature for PV connectors to reduce confusion amongst installers and developers, while improving deployment practices. They catalogued a sampling of twenty-five commercially available 4 mm connectors.

Battery fires, while a rare occurrence given the number of lithium-ion batteries manufactured and deployed each year, are common enough to worry insurers and others in the industry. Following high-profile battery fires in 2024 and 2025, the industry is busy implementing solutions not only to reduce the risk of fire breaking out in the first place, but to contain and mitigate the risk of injury or damage should it happen. Conclusions from large-scale fire testing will be key.

RMI has released Solar Under Storm III, analyzing solar power facilities in the hurricane-prone Caribbean and reviewing past storm impacts to identify six major failure modes and ten risk-mitigation specifications.

Multiple factors affect the productive lifespan of a residential solar system. In Part 2 of our series, we look at solar inverters.

Several factors affect the productive lifespan of a residential solar panel. In the first part of a series, we look at the solar panels themselves.

Solar modules are getting bigger, thinner, and more powerful. But from Texas to Thailand, the same problem is appearing: broken glass. Not from hail or mishandling, but from cracks that spider from frame edges, splinter near clamps, and web across modules. In cases seen by Jörg Althaus, director of engineering and quality assurance at Clean Energy Associates (CEA), it starts with a few panels – then dozens, hundreds, even thousands.