Hi Jenny,
I am new to this group and can't answer any electrical questions but there are plenty here who can. I am here to learn more on electrical
myself so mostly just reading posts for now.
Not sure why no one answered your post. Overlooked perhaps.
It sounds like you have investigated your situation well and I want to
offer my encouragement for your re fit.
There was a legitimate negative post recently about LPG but my view is if a boat already has LPG for refridge, heating, hot water, stove etc. that it is logical to run a motor on it there by combining fuel needs into one type and get rid of gas tank. There are safety concerns but there is for batteries, gasoline, and deisel also.
A hybrid set up like you propose with a generator will work and I
am posting this along with your original post so others will help you with their knowledge of what set up works best. We shall see if you
get ignored again.(what's wrong with you guys!)
I am looking to change out the 2 stroke motor on my boat too.
The smell really bothers me. Weight is my biggest hurdle.
Also I added a link about how careful we all need to be with any type
of gas that when burned can put out carbon monoxide. Not to scare but
to drive home to everyone to have working CO/propane detectors in the boat and in the right locations.
http://www.multihullsmag.com/magazine/articles/propane%20article.htm
Hope this helps,
Don Parsons
F-24 mk-1
Posted on June 18
--- In electricboats@yahoogroups.com, "Jennifer" <jennifer_c_richards@...> wrote:
>
> Hi :-)
>
> I am restoring a 25` Folkboat which had an 8hp 2 stroke Stuart P65-ME Petrol Engine. The engine, like the boat, has seen better days.
>
> Unlike the boat I feel little sentiment to the engine especially considering it will probably be very unreliable, hard to source parts and expensive to run. I have to buy a generator for power tools to restore the boat and my first consideration is which generator would be suitable and I would welcome any suggestions.
>
> My research suggests I use a LPG conversion of a petrol generator for best economy mixed with ease of finding fuel and safety. I was assuming that I would get a generator with at least 110v + 240v ac (I'm in the UK) the 110v for running the motor and the 240v for charging batteries and for powering mains electric devices.
>
> I would like the option of producing more power from the prop than the original motor (perhaps 10-12hp equivalent) to fight strong currents while being more efficient and being able to use battery power for up to a few hours at half speed.
>
> I am concerned that DC current from the motor would make a more efficient system, presumably based on what the generator wiring produces but I am no electric wiz and any advise would be great. I'm also concerned that a standard electric generator would not last long at sea or overheat if stored in a sealed compartment.
>
> Essentially I am thinking of a system that either goes:
>
> generator > dc-dc or ac-dc charge controller > 48v battery > 48v motor
>
> or
>
> generator > 110v controller > motor (while running)
> simultaneous > dc-dc or ac-dc charger - batteries > motor (battery mode)
>
> I would also like the generator to work as a combined heat and power system to heat the boat or hot water system.
>
> Any advice would be really helpful
>
> Thanks
>
> Jenny
>
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