I was looking up info on the hydro gear site and the deck motor/controller have a max of 55 volts which is also the max on the transaxle/controller. That makes the 14s too high based on that rating for me and no second chances. I don't know if they are already pushing it at 55 or if that is safe and really it'll take 60. Since the leaf cans come 2s2p they aren't easily made to a 13s pack and cutting a volt pack looks pretty scary too.
I was looking at the discharge curve on volt cells and the point before they drop off a lot is right near the blade shutoff so 12s maybe be a pretty good match. It won't be like lead though. With lead the blades shutoff and the voltage pops up and you are "good" to go back hundreds of feet to the charger. With the lithium the blades shutoff and the voltage is still lower than it should probably be and won't bounce up alot. So the blade shutoff will be the failsafe and I'm going to have to add some cell level and pack level voltage alarms at higher spots.
If I could squeeze in 3 packs at 50ah a piece for the newer model of volt modules that may be worth the frustration factor of doing a little butchering but lower initial outlay for one 48V/50ah piece and potential of fitting 150AH onboard. So back to a flip in the coin on which way to go with leaf of volt cells. Hm maybe I could fit 3 leaf cans in parallel which would be 180AH
no nope I'm not getting trojans again I gotta make up my mind somehow
Edit: contacted hybrid auto center to ask about a 12S leaf pack. It'll be 120AH at just under half the current weight. I'm trying to find a drop in replacement and the volt involves alot of unknowns and permanently modifying the mower into a rolling science experiment.
Edit2: Ordered 12S leaf pack, charger and BMS. BMS comes with a wifi hub so I can connect from a device to check cell voltages and hopefully some other useful stuff.
I was looking on eBay for that interface tool and found there is someone selling a crate of deck motors and two crates of transaxle so. 1500$ gets you 80+ surplus deck motors. Wish I could just snag a couple.