The catastrophic power outages affecting Spain, Portugal and much of southern France have attracted attention to the role of renewable energy and energy security.

The sudden and widespread power outage is one of Europe's worst living memories, affecting the entire Iberian Peninsula on April 28.

The power outage that lasted for several hours left much of the area in darkness, trapped thousands of train passengers, and received cash from ATMs without phone or internet coverage.

Since then, Spanish authorities have conducted several investigations to determine the root cause of the incident, including an investigation into whether a cyber attack may be blamed.

Along with the Spanish Opposition, some outside observers have marked renewable energy and zero emissions targets as possible causes of power outages, especially given that Spain and Portugal both rely on high levels of wind and solar grids.

"It's sad to see what's going on in Portugal and Spain and there are a lot of people, but it's just a dangerous effort when you drag the carriage into the weather," U.S. Secretary of Energy Chris Wright told CNBC's "Strong Lunch" on April 28.

Spanish Prime Minister Pedro Sanchez and the country's grid operator Ree Espana (REE) both said the record levels of renewable energy were not the fault of the power outage.

Meanwhile, Dan Jorgensen, head of EU energy, said there was nothing "abnormal" in the source of energy that powered the system during the outage.

"The reason for the power outage cannot be simplified to specific sources of energy, such as renewable energy," he added.

European Energy Technology Corporation calls on observers to avoid drawing their own conclusions without formal explanations from the authorities.

Henrik Andersen, CEO of Danish Wind Turbine Manufacturer Vestashe said, would encourage blackouts to "a certain level of politicians", especially as Spanish policymakers continue to investigate.

“First of all, energy security means you can run your society without power outages. It’s obvious.”

He added: "Everyone is grabbing the root cause of the quick and blame each other, I just don't want to go there because until we know the root cause of why the grid fails in Spain and Portugal range, we don't guess for a second time or try to blame someone or blame someone on cybersecurity."

"Europe needs more energy - we may also need a stronger grid," Anderson said.

Siemens' energy Meanwhile, CEO Christian Bruch said the German Energy Technology Group is in talks with related transmission and utility operators.

"You do see that when you build an energy system, you need to think about the sun, wind, gas, etc., but you also need to think about the overall system on the mesh side (IS (and how can the operation be stable)."

He continued: “This is sometimes underestimated its complexity, which is why it is currently necessary to get grid-stable products from us to balance these things.”

"It can be solved, but it requires investment, and it's not easy. It's not just a few solar cells and some. It's a little more complicated than that," Brooke said.

For those present in the event of a power outage, the lack of power emphasizes the challenges of the digital society.

"Cash suddenly became very important," Roseanna, a resident of the southern Spanish city of Málaga, told CNBC. She said she had only 40 euros ($45.16) when the cuts were cut at noon.

She continued: "Obviously, you can't make money and you can't pay with a card, so it's certainly important to have a little cash in your pocket all the time."

"We've gone all the digitalization, but without electricity, the system would be ruined."

- CNBC Karen Gilchrist Contributed to this report.