I have a "free" charger from Coulomb available, they also credit $1,200 towards the installation as long as you use SPX for the install. There are some strings attached to the "free" part, so my question is this.

As I understand it the Voltec charger output is 15A as opposed to the Coulomb output at 30A

https://www.homecharging.spx.com/vol...83_VOLTECH.pdf
https://www.homecharging.spx.com/vol...t-sept2010.pdf

What difference does the 15A vs 30A output make?

Thanks!