Reply from tech support

[Pdelcast]

Originally Posted by TexasSP

You do realize that the pack you have is only rated for 78 amps? On the MMM you should at least have packs capable of 100 amps continuous. I am not surprised the ESC blew on those. I would also not be surprised if the cells are now damaged as well.

QFT -- the MMM can draw upwards of 400amp surge, and 90-100 amps at full speed. You need a pack rated for 100A minimum.

[tibalotte]

Ok guys. Thanks for all these great answer. I didn't know that it could exist minimal requirement for this kind of setup and that weak battery could be harmful for the esc.

Good to know

[BrianG]

Originally Posted by Pdelcast

QFT -- the MMM can draw upwards of 400amp surge, and 90-100 amps at full speed. You need a pack rated for 100A minimum.

Patrick, how about adding a brief not-too-techy note on your site explaining this? I've seen many many people who do not understand how much current these setups can pull (especially those guys who gear their E-Revo for 90mph and wonder why things blow). Maybe even some graphs for logged runs as proof of typical real-world setups? It would probably be good to note that some loggers can't measure the full current bursts because they are limited to their rating. Also, there seems to be a thought that since the ESC is rated for ~150A, that the ESC will only pull 150A whether you are gently driving a moderate setup or mashing the throttle on an aggressive setup. I guess what is needed is "layman's electronics 101".

[JThiessen]

Originally Posted by BrianG

Patrick, how about adding a brief not-too-techy note on your site explaining this? I've seen many many people who do not understand how much current these setups can pull (especially those guys who gear their E-Revo for 90mph and wonder why things blow). Maybe even some graphs for logged runs as proof of typical real-world setups? It would probably be good to note that some loggers can't measure the full current bursts because they are limited to their rating. Also, there seems to be a thought that since the ESC is rated for ~150A, that the ESC will only pull 150A whether you are gently driving a moderate setup or mashing the throttle on an aggressive setup. I guess what is needed is "layman's electronics 101".

Great idea - or how about a calculator similar to the ones you have Brian?