We bought an air-cooled 7.5kw diesel genny from AffordableGenerators-com, intending to use the engine for hybrid power in a Rawson 30. Trouble was the owner had gotten used to silence, and the air cooled one-lunger pounds very hard. The engine's now in the basement. There's also an axial clutch (like an automotive AC compressor), 6" dual v-grove x 1" shaft, 12v clutch coil, sized to allow the diesel to run 2.1:1.
So far, 12v power convertors and a line voltage genny have proven the most cost effective. One install has a 3.5kw propane generator. Nice fuel from a storage standpoint. The power convertors have three stage chargers as well, are fan cooled, conformal coated, and cheap. Marine units from Iota if deep pockets plague your every day, RV units from WFCO are serving well too.
I'll part with the diesel and clutch for a token offer if a Bay Area gear-head wants to jimmy them into a boat. Twin mufflers and electric start on that diesel too...
Be Well,
Be Well,
Arby Bernt
Advanced Marine Electric Propulsion
Good thread. I am considering using a new 10 hp air cooled diesel on ebay for $619 and (4) automotive alternators to charge a 48 volt bank. Entire set up should be only $1K and produce just shy of 7kw of charging. Bob
--- On Sat, 9/15/12, hardy71uk <dottir@hotmail.com> wrote:
From: hardy71uk <dottir@hotmail.com>
Subject: [Electric Boats] Re: 48v diesel telecommunications standby gen?
To: electricboats@yahoogroups.com
Date: Saturday, September 15, 2012, 10:27 AMI'm thinking of using a 3phase generator . Use three transformers to bring the voltage down to the required value . Make the output DC via a 3phase rectifier. Should make a simple charger.
Chris S
--- In electricboats@yahoogroups.com, Michael Mccomb <mccomb.michael@...> wrote:
>
> other than the Panda stuff which is VERY expensive has anyone come across a 48v dc diesel charging system.... i'd rather use a sort of RAID approach with a much less expensive diesel/PMA system but am pushing the limits of my understanding to devise such a system.... seemingly both diesel engines AND permanent magnet alternators of sufficient power/capacity can each be had for under $1k... some electronics is undoubtedly needed but adding this would still bring a system in perhaps 10k under the Panda price
>
> one can stumble across all sorts of reference to 48v diesel units used for telecommunications systems but i have had great trouble actually tracking such a unit down
>
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