I respect your views even if I don't agree with them. And I apologize for not considering your views as being above argument However, I gather that you don't understand what I want to do. At this time I do NOT want to re-engine the boat. There's still a few years (at my usage profile) of life in the existing power plant. The projected fuel savings that I would realize from re-engining are nowhere near the 10,000 US$ range over the next 3 years. Resale value would be an issue MAYBE in double that time though triple that time seems more realistic to me. You might have had a point if my usage profile were different (e.g. a boat that's being used several days a week for charters or, even a boat that's used 2 weekends out of every month and doing at least 100-150 miles each time) but that's not the case. Having done IT consulting professionally I understand where you would be miffed when it seems that I'm ignoring your, no doubt, experienced if not professional advice. Having said that, and possibly due to my own fault, your understanding of my "needs & wants" (the very basis for effective consulting) is quite lacking. Your valued advice is based on assumptions that are simply put totally wrong. For example, CONSIDERING changing the electric system is NOT the same thing as WANTING to do so. Certainly not doing it in the immediate future. Ditto for the re-engining. Rome wasn't built in one day and my boat (as most if not all boats) will be a continuing project. I'm quite certain that once I'll be faced between the choice of rebuilding vs re-engining the power plant I will chose the latter. That choice will necessitate several other major changes (e.g. moving to a 24 volt system). Until that time I chose to do only incremental changes. And, until that time I would like to get the most of what I have (subject to my needs). So, for example, I currently do not have a dedicated house bank (of batteries) and I'm not going to put one in. I don't need it for my usage profile. However, if my converter will go south I will not spend 5,000 US$ on a new 32 volt unit. What I will do is go for a 24 volt unit and a new house bank. I realize that I would have to change the whole house system but that will eventually become necessary in the future (re-engining time) anyway.