Need some help with a purchase of a sabvaton controller

Hi guys,

I'm in a bit of a pickle here,

So I build myself an steath bomber a year ago and I ran thru a lot of different parts to see what would work better or just work without blowing.

So I have a bafang rear hub it's a 1000w 48v geared hub (I can provide a model number if needed don't have it on hand right now)

I'm running two batteries in series

2x 36v 15ah batteries they are the same

I did that to achieve higher voltage and power.

I was running 50£ dual mode controller that can handle 84v and 40A no problem and they always end up with a transistor blown o some other.

I would like to upgrade to a sabvaton controller so I could program it and be available to controll the power so I don't end up changing controllers every 3months.

And plus one of the batteries has gone to sleep and I gonna need to wake up the bms the battery is in mint condition its just been sitting for a couple of months.

If I could kindly get some help would be much appreciated.

I can provide more info on all components just let me know what exactly what is needed.

Thank you in advance everybody