Where can electronic power converters for photovoltaic systems be mounted?

The correct answer highlights that electronic power converters, such as inverters used in photovoltaic systems, can be mounted on roofs or in areas that are not readily accessible. This is because these converters are often designed to withstand outdoor conditions and are typically located close to where the solar power is generated. Mounting them on rooftops allows for a more efficient electrical installation, as it minimizes the distance between the solar panels and the inverter, reducing power loss and improving system efficiency.

This mounting option also complies with safety and installation standards set forth in the National Electrical Code (NEC) and is practical for maintenance purposes. It's important to note that while such systems should be accessible for maintenance checks and service, they do not need to be located in easily accessible areas where everyday usage would be expected, hence the distinction of being "not readily accessible."

The other options may not be suitable for various reasons: mounting indoors could limit ventilation and possibly cause overheating, placing them in accessible storage areas might increase the risk of damage or inconvenience, and positioning them in bathrooms would violate the NEC regarding electrical installations in damp or wet locations.