I recently purchased a 2007 E4 looks like the controller number ends with T4. I was planning to use 10S 72V lithium ion, but the packs I purchased are actually 24S 90V and it would be much easier to leave them intact. I initially planned to strip 4 cells for 20S, but since I see people are actually going to 90V, I am hoping you guys can fill me in on what I would have to do to run 24S. I have a Chargery BMS 24T on the way so that would work as well. I don’t mind buying a charger if needed I have been poking around the forum a bit now but obviously need to do more since much of what I want to learn and try has probably already been done.
I have mostly seen users talking about 90V on other carts, not 2007. I am a new Gem owner and trying to learn, I am not sure what model year cut offs have significant changes. What years are the same as the 2007? Will all 2007’s have a T4 controller and the same motor or do components vary between models for the same year?
I’m new to Gems and any help would be appreciated.
My most important question is, for a stock 2007 E4 to run Li-Ion 24S 86-88V nominal up to 100V fully charged, what would I have to do? Are there voltage sense wires on the charger or ESC that need to be tricked? Will the defroster and other things stop working? (thought I read that somewhere here). What are the maximum voltage limits for all components in the stock 2007 E4? Can I go slightly higher?
I would not mind limiting the cells in the 24S pack to 4V (96V) or 4.1V (98.4V) for longer life and to help keep within max voltage limits for componenets.
Has anyone done a 24 cell li-ion mod to a 2007 E4 or cart with the same components?