The maximum amperage a 6mm solar cable can handle depends on several factors, including the insulation material, temperature rating, and specific standards or regulations governing electrical installations in your location. Generally, a 6mm solar cable with appropriate insulation and rated for solar applications can handle currents up to approximately 50-55 amps, assuming typical operating conditions. However, it's crucial to consult the manufacturer's specifications and relevant electrical codes to ensure safe and proper installation. Factors such as ambient temperature, cable length, and voltage drop should also be considered when determining the appropriate cable size for a solar installation.