Most of you probably know my situation but if not here's the basics. I went to do a PIS 4KW DIY Install but, only received the batteries. I do not expect to receive any more components (details can be found here http://priuschat.com/forums/prius-phev-plug-in-modifications/105157-plug-in-supply-diy-5.html). So I have 76, 3.2V Lithium Iron Phospate Headway batteries sitting in my garage. I would like to put them to use but, since I already paid for a full conversion, I have very little money to spend. What's the cheapest way to make use of these batteries? Is it Norm's BMS2 that I see for $449 w/out Canview? Or some other route. Many thoughts have come to my mind but, I just don't have the knowledge to know if they're feasible. One thought is to replace the Nimh battery w/ the lithium cells (no PHEV) but, the voltage differences seem to make that a no go. My thoughts are to tie three 3.2V cells (9.6V total) to mimic one 7.2V Nimh cell. I theorized you could place resistors between the output of the three cells to drop the 9.6 to 7.2 and use all the original equipment in the Prius. What are the problems with this approach? Is it doable? Will I gain anything? If I choose the other route (BMS2), what add'l equipment will I need? Charger? Contactors? I also thought about Peef's conversion and wondered if I could do something similiar???? I know you are the experts so, I pose this question to you. I hate to see the batteries just sitting there in my garage. Thanks in advance for any and all comments/help.