Thing is, loose wiring and increased resistance may make heat, but what it doesn't do is cause increased current draw/flow.
While checking wiring for hot spots, loose connections (esp. screw terminals) and signs of overheating is SOP, what I'd be looking for is where the extra current is going. To ground? Across a short somewhere? An OBC defect (ie the car really is drawing more current)?
If visuals give no good clues, a clamp-on current meter is helpful.
2014 Rav4 EV, Shoreline Blue Pearl, #2609, first use 04Jun2014, 49k miles (Aug2017), OpenEV-SE 40A. First DU replacement May2018 59k.
2018 Model 3 LR AWD, blue. 9.6kw solar