[bronsonj]

I ran the stock controller on my TXT48 when I switched to lithium. The stock charger cut off at just over 60v (I overcharged the pack accidentally one time) but I would manually cut the charge at some point under 57.6v normally. 58.8v is my pack max (60.3 didn't cause a fire, luckily). The stock controller worked perfectly fine every time I used it. I switched to alltrax before I did the accidental overcharge so the most V the stock controller saw was between 57v and 58v. No issues on the curtis controller. But I didn't run it long term that way either... $0.02

Edit: I am still on the stock solenoid too. FWIW