ENTSOE does not have a simple answer to the question but they add an important point Security of supply threats in systems with high penetration of renewables are not in generation adequacy alone but also in flexibility voltage control and transient stability

What is the correctly punctuated version of this sentence?
ENTSO-E does not have a simple answer to the question, but they add an important point: Security of supply threats in systems with high penetration of renewables are not in generation adequacy alone but also in flexibility, voltage control and transient stability.