New Clean Dump/Flojet macerator overheating?

I think it's voltage. I had a similar issue when I first got my macerator then I ran a direct line with thicker wires back to the battery and didn't have the problem again... until it finally clogged up beyond repair.

I've switched to the Sewer Solution for day to day waste disposal and I keep the good old stinky slinky as a backup or if I need to use the dump station quickly.