lithium battery BMS... are any of the Chinese BMS offerings good above 100 Amps?

so in the process of building my new lithium battery bank I have already had a BMS fail (or possibly bricked by its own program).  It had about three or fours hours of charging on it.   After tp balancing the batteries and building the bank with the BMS wiring etc.  I was using the bank to power my prototype battery heater setup to see how hot, (or not hot) the aluminum panel that I am using as a base plate/ heat sink for the batteries would get at the current ambient temperature of 18°C.  

heater specs:  8 x 25 watt 12 volt pads attached to the bottom of the 6mm (smidgen less than 1/4") plate with the heat pads taped to the aluminum with kapton tape for testing purposes.  this is controlled by a temp controller that is adjustable in .1°c increments  the pads are wired 4s x 2 and I was testing temp rise/final temp between the two heater packs wired in parallel vice series  (48 volts vice 96 volts) and current draw/Watt hours used via a hall effect cell.

when done testing on the draw side I decided to recharge the pack using a magnum 4448 that I just got back from repair.  I set the magnum at CC/CV and set the voltage for the recommended voltage (thanks McIvor) and it and the BMS proceeded to charge the pack to about 76% at which time the BMS stopped charging for some reason.  end voltage was still to low to trip the BMS into shutting off.  thinking my BMS parameters were off I started investigating and regardless of what I did it would not start charging again (monitored via Bluetooth interface)   I tried varying the end voltage settings, tried adjusting the inverter to a higher voltage charge regime, trust me over 5 hours went through all the options.  in the end I unhooked the BMS in accordance with the makers plug in/unplug requirements (at its sense wires plug into the BMS, and then the actual batter minus connection.)  From that point forward it would not restart for any reason nor would the Bluetooth dongle turn on, so now I cannot even monitor the cells.

I am studying this BMS maker on another forum that is primarily a lithium battery/BMS specialty forum and a lot of issues have cropped up it seems in the last three years since this maker came out.  and after searching many many threads it seems to me that no matter what BMS you go with...American designed/made, European designed/made, Chinese designed/made (over 50% of them are made their regardless of design location),   they all have trade offs and it seems that any BMS that is touted as being for a 48Volt system and over 100 amps charge or dischage all have major issues.  the most expensive I have researched is over 1000 USD  from the states and anything that is similiar is the same but none of the "high end ones deal with over 100 amps unless theya re a contactor design.  (IE huge freaking magnetic relays)  any that are mossfet based and considered high end seem to top off at 100 amps.

now my max draw has to date been about 60 amps, so quite a bit below 100 amps but I chose to buy a 200 amp unit so that I could "derate it " for safety sakes....

any body got any ideas on lithium BMS's or insight? 

Cheers

Ken