One is not enough, unless you buy 4 and connect them in series. The voltage of a single one is 12 volts, and four connected in series can reach 48 volts. It is recommended that you use 4 to 6 in series.
Our solar panels have undergone low-temperature -20° cycle testing. The solar panels can work normally without losing power. Temperatures above -25° have little effect on the panels.
