Yes, higher temperatures maximize resistance, therefore you may have to make use of a bigger wire size in very hot environments. That’s why wire sizing is especially significant in DC units — they work at small voltages, so even a little drop can noticeably impact overall performance. Much like https://pv-cable-calculator83603.blogvivi.com/40046116/dc-cable-sizing-guide-matching-wire-gauge-to-solar-panel-output