For 1/10 of a second the highest power peak on this run was at 2,5KW. In my lighter buggy i saw power peaks up to 1.8KW with the same components and a similar top speed gearing.
The Neu 1512 is rated for 2,5KW for a short period. Guess i reached it's rated maximum.
Those A123 cells do deliver about 100A max for short bursts and are only warm after a run since i only draw 10-20A average.