Hi My 20’ box truck needs a jump start - anyone out there have a really powerful truck that can help. Located across from Ashby Bart on Ashby. I’ve tried charging using my 6 cylinder truck and left it on for 2 hours but no go. I live on the other side of the block so an extension cord will not work. I need to move it to in front of my house and can charge from there - but first I have to get it started to drive it over. Thanks for your help or advice Alice 415-272-0596