In May 2017, my battery pack refused to accept a charge. Tesla installed a loaner pack. My rep at Tesla, today, still does not have an ETA. Should I be concerned.? The replacment pack is a 90kw max power pack instead of my original 120kw pack(P85, 2014). I am planning a trip from Ottawa to Hilton Head in December and it would just be that much more annoying to wait an additional 5-10 min for each stop.