Q1: Can overheated flexible panels really cause a fire?
It’s rare, but the risk is real. If a cell has microcracks and is partially shaded (such as by a tree branch), it creates intense localized heat known as a “hotspot”. In theory, it could burn through the backsheet. Using a product like PA621 with A Honeycomb aluminum composite back sheet Heat spreads across the aluminum matrix, eliminating the risk of single-point burns.
Q2: Is the honeycomb back sheet heavy?
Not really. While PA621 is thicker (6 mm vs. the standard 2 mm), it uses lightweight aerospace-grade aluminum and a hollow composite structure. It still is 1/4 weight A toughened glass panel. It is the best choice for weight sensitive class BRVs (under 3.5 tonne limit).
Q3: Should I put flexible panels on the black roof?
Be very careful. Black roofs absorb heat like crazy. If you must install on a black surface, we Strongly recommend Using the “polycarbonate sheet” method or going straight Singold PA621 with its integrated thermal barrier. Otherwise, a standard flexible panel may only last half of its expected lifespan.
The result: Let your panels breathe
Overheating is not a death sentence for flexible solar. This is simply a result of choosing the wrong product or the wrong installation method.
Whether you hack or upgrade a DIY air channel Singold PA621 Seriesthe rule is simple: Create airflow, block heat.
Don’t let your solar panels cook on your roof. Give them some space, and they’ll pay you back with reliable power for years to come.
