that thing is only good for 200W. Running a monster at 14.4V it will only allow 13.8A through lol, no good. If your strap for cash build your own packs. Get 8 cells from
this guy and make a 4s2p pack. It would be 8000mah 25C 30C burst which will deliver a more respectible 200A continuous 240A burst for about $200.