Update:
1) what the IQ4 kit does is it sets the max V to 14.7V for ~2 hours (max. I is always 30A) and then drops it to 13.6V. There is some extra intelligence to check periodically if the voltage drops, etc. (so you can fool it by disconnecting from the battery for a while and then it will kick in the 14.7V again)
2) An alternative is to simply put the "plug" that comes with the PSU (mine did not have one but it is easy to make: just use a headset cord and wire cables 1+3 together). This makes the max V to be 14.2V permanently (but max I still 30A, of course) which is 3.55V per cell and may be perfectly fine.
So not all is lost, having paid only ~$30 for the psu and ~$20 for the IQ module this is still not bad. But I really think they should not have put the time limit, it makes no sense for LiFePO4. Maybe some day I will open the module and see if I can mod it.
For the moment I still don't have a BMS so I need to be extra careful with the cells. Once I have the BMS I may be able to push the PSU limits more.