I have an EVI Portable EV charger. Model number: PC-0113-AA-SM and am finding when the temperatures dip below about 20 degrees or so, the charger will not keep charging. It responds immediately as if it is charging but turns off after about 5 seconds or so. When I bring it inside and let it warm up for a while, it will then charge. Has anyone experienced similar problems? If so, were you able to resolve it AND how? Thanks!