Quick answer
APAR's e-beam cross-linked XLPO solar cable is rated for 120°C continuous operation across an ambient range of −40°C to +120°C, with a short-circuit limit of 250°C for 5 seconds. That headroom matters on a rooftop, where cable in conduit behind a panel routinely sees far more than the air temperature. The cable is certified to BS EN 50618:2014, IEC 62930:2017 and UL 4703, rated 1.5 kV DC (maximum 1.8 kV), with a service life expectation of more than 25 years.