So, I'm confused, how is this improving your gas mileage? Are you using this to somehow charge the IMA pack? Is this just an enhanced starter battery? Are you still using the enginer parts? A lot of things are still very unclear to me. I'm seeing lots of parts whose function isn't very clear.
My attempting to make sense of things has lead me to this guess. It appears you're using an ac->dc battery charger to charge your SLA batteries, then running those into an inverter, which is connected to a pc power supply, which is then hooked to a dc->dc converter (referred to as an amplifier in the video) to jump up the voltage to the IMA pack spec.
If this is the case, why deal with the inverter + psu middle-man and not just connect your batteries directly to the dc->dc converter? Also, you mentioned something about solar panels, yet none were mentioned anywhere in the video. What role do they play in this? You also mentioned "the starter battery will store the excess", the excess from what? Sorry if any of these questions seem dumb, I'm just trying to understand what I'm looking at.
Also, where are the people who call it a 'mini phev'? I googled the term to try and find out more, and I found articles about people doing things with Mini Coopers, and your post here is the #2 result. Another post of yours from insight central is #3. In fact I'm going to go read
that insightcentral thread because I feel the answers to most of my questions will be in there.