Photovoltaic panel impact resistance

Does a crack in a photovoltaic module affect performance?

Not all external cracks will result in reduced performance, though. In some cases, the damage is purely cosmetic or only on the surface. Hail is a problem for photovoltaic (PV) modules because most warranties do not cover damage related to hailstorms.

How does hail damage affect photovoltaic systems?

In particular, hail damage seriously affects photovoltaic systems. The severity of hailstorms as well as impact responses are important factors in mitigating loss, so the first research area that needs to be addressed is the resistance of photovoltaic modules to hail.

Can PV modules withstand hail?

Hail tests on photovoltaic (PV) modules should be beyond the conventional testing. Power reduction of 21.47% is observed in glass to backsheet PV modules under hail. PV modules with front glass thickness of 4 mm can withstand severe hail damage. Use low wet-leakge current resistance modules for high hail-prone regions.

Does a PV module need a higher hail impact test?

So as required by the IEC 61215, higher hail impact testing may be specified by project owners, which may partially quantify the risk of damage and financial loss in the event of a practical hailstorm. The impact of hail on the PV module is investigated in detail in the laboratory test set up to understand the feasibility of the present standard.

How strong should a PV module withstand a hailstone?

According to IEC 61215 standard, a PV module should resist at the minimum to the impact of a hailstone of 25 mm launched at 80 km/h, while the Swiss VKF standard demands a minimum of 30 mm, practically making it 40 mm or more.

How does a hailstorm affect a PV module?

Donald and Abraham conducted tests to see how a hailstorm might affect the functioning of a PV module. According to the findings, the impact of a hailstorm on a PV module is mostly determined by the material used for the front layer. When cracks occur in the front glass surface, the solar insolation that reaches the solar cell is reduced.