Dual MM + One Motor= ?

[skellyo]

It will probably be ok in terms of the heat dissipation, but it's really a poor idea compared with going with a higher voltage and less current.

Look at it this way as an example...you have a 2000W load...

2000W on 4S = 135A, so 67.5A per MM designed for about 100A continuous (IIRC)

2000W on 6S = 90A on a single MMM designed for about 200A continuous (IIRC)

I know which one makes more sense to me. IMO, sell the MM's and buy a MMM.