I believe that 20 years of hypermiling in my Insight have given me--as Liam Neeson says it--"a certain set of skills." If I can't make my particular Clarity maintain a consistent SoC in HV Mode, nobody can. Other drivers who see their SoC remain constant in HV Mode are driving Claritys that are different than mine. However, this is the only aspect of my Clarity that does not measure up to the best of them and it does not really bother me because I've gone as long as 10 months without using HV mode or visiting a gas station. What a great car this is!