Well I finally bit the bullet and put down a deposit on the 10KW lithium ion pack. Gonna try to install ourselves and Ill do as others have here and document the process. While I am waiting for the pack to be ready, I have a few questions for the folks that have done the upgrade: 1) how hard was the install, and how hard is the Sevcon controller to remove? The charger looks simple but the controller seems in the middle under alot of metal structure. 2) Are there any charging tips or tips in general for cold weather? Will the pack charge under 32 degrees? Mine will be used in the mountains of WV, very deep terrain and it does get pretty cold in winter. 3) are there any maintenance tips and what range do you guys with lithium keep the pack in? Ive been reading that lithium ion batteries like to be around 50-60 %, was thinking 20-80% is a good range to try to keep them in unless you need that extra 20% for something - similar to what they recommend for Tesla or other EV cars. Any info you guys can share is great and Ill post more thru the process too.