I'm using the longrun (from Alibaba). up to 440V, CAN control so you need a BMS with this capability. programmed to run like an Elcon. you can also parallel them.
http://www.longruncs.com/h-col-118.html
no problems for about 2 years now. their customer support is good.
re reading this it sounds ...

thanks for the replies. 50kW would be fine. thats about double my current power
I'm not after high performance, just something that is reliable and actually works.
anyone had any experience running at such a low voltage?

I have an '82 VW van that is already an EV. 120V 36kWh LIFE battery, 30kw no name chinese AC motor running through the OEM gearbox. it runs fine but is a bit weak.
Time for a Tesla upgrade.
any ideas how it will go on the 120V system? the battery is in GC so I dont want to upgrade (yet).

I could ...