Below is the latest report from my customer in Indiana that has a 4kwh Enginer kit in his 2010 Prius. It has RealForce batteries and a BMS we installed from Pacific EV. We may switch back to the Enginer BMS in the future since it has a bit more features and datalogging ability.. I am not posting this to taunt anyone but to give you reassurance about my customer's experience with Enginer system. While you will probably not get as high of mpg as this guy gets, I am confidant that we can get systems dialed in so they are operating to the best they can be. So here's what he told me today... He finally used up the tank of gas he was on when we put in the new balancer a few weeks ago. His results: **107 mpg !! ** This was hand calculated at the pump. He couldn't remember exactly, but it was something like 1,141 miles, 10.67 gallons. He said he drives around with 99.9 on his screen almost all the time. On his latest round-trip commute (42 miles) he still had a tiny amount left in the Enginer pack. Previously this customer had problems with an imbalanced pack, plus at least one component that he accidentally shorted out by putting a screwdriver in the wrong place. As an installer, it has taken time, patience, and perseverance to get to this point. But the customer definitely feels like it was worth it. He is very satisfied. I also want to mention that this guy is still kind of an outlier. He says he usually gets 57 mpg on his commute without any PHEV pack, and his best tank previously was ~68mpg. This is without any special techniques. He just has a commute that is good for the Prius that involves quite a bit of 45 mph roads.