I found this chart
From: Bill Spires <spiresac@yahoo.com>
To: electricboats@yahoogroups.com
Sent: Tue, October 26, 2010 9:57:41 AM
Subject: Re: [Electric Boats] Re: battery bank upgrade
I saw a chart on the internet a while back that compared the cost of gas, cng, propane and electricity for the same energy and electricity was by far the cheapest. These numbers were based on buying from normal sources at an average market rate. I have run engines on propane and one factor to consider is that propane is such a clean fuel that the engine will last much longer. The only problem I see is that you will lose power related to throttle opening and the Honda engine may not have enough reserve power to push the gen set to it's rated capacity. There may be a conversion kit for it. There are huge advantages to converting from gas. The stuff they sell as gas now we would not have used to light a fire with a while back. Unlike the current gas, propane does not degrade and destroy the tank when it sits a long time.
Fair winds,
Capt. Bill
From: Aaron Williams <akenai@yahoo.com>
To: electricboats@yahoogroups.com
Sent: Sun, September 26, 2010 8:45:28 PM
Subject: Re: [Electric Boats] Re: battery bank upgrade
Steve
Any idea what the run time and cost difference of running propane rather than Gasoline? I wonder if you could run hydrogen as well.
Aaron
From: Steve Spence <steve@green-trust.org>
To: electricboats@yahoogroups.com
Sent: Fri, September 24, 2010 3:10:53 PM
Subject: Re: [Electric Boats] Re: battery bank upgrade
I run my honda on propane. cleans up the fumes.
Steve Spence
Renewable energy and self sufficiency
http://www.green-trust.org
http://arduinotronics.blogspot.com/
On 09/24/2010 07:04 PM, Samuel Shallard wrote:
>
>
> Brian; was very interested to see your post.
>
> I currently run 4 Lifeline AGM's in series and charge with a 4 Bank Dual
> Pro SE charger. I had wondered about using my Honda eu2000 for longer
> cruising. I can run 4.5-5 knots pulling around 15-17 amps at 48V.
> I had posted a few months ago to see if anyone had tried-also wrote to
> Dual Pro but did not hear back.
> Like you my only issue would be to set the Honda so the fumes are not a
> nuisance. I have been contemplating adding two more batteries for range
> but did not really want to add another 200lb in weight.
> On Sep 24, 2010, at 12:35 PM, Brian Holt wrote:
>
>>
>>
>>
>>
>> Well the Elcon charger came this week and I installed it yesterday. It
>> charges my AGM bank higher than the Dual Pro. I did test it out
>> yesterday with my Honda 2000 generator. With my boat tied up in the
>> slip I ran the motor while hooked up to the generator. Monitoring the
>> paktrakr, I pulled 27 amp before the generator started bogging down.
>> The voltage pulling at 27amp was a constant 49.2 and would
>> occasionally climb then drop, but not below 49.2. When I shut down
>> everything after 10min of use the voltage read 51.4 which is where I
>> had started. I am very happy with these results as 20amp easily pushes
>> my boat 4knts (in calm waters). This is a great set up! I rarely will
>> use the generator, but I feel comfortable cruising longer distances
>> now with this back up. It is also nice to have two chargers onboard.
>> Hopefully the cost of LiFePo4 will come down to more reasonable cost
>> in the future. Then I will already have a charger that will work for
>> the new bank. Next project is to build a platform off the stern where
>> I can place the generator while in use to keep the smell and sound to
>> a minimum. I already have an idea utilizing my existing swim ladder. I
>> will give an update when I have more experience using this set up.
>> Thanks again for all the input!
>> Brian
>> --- In electricboats@yahoogroups.com
>> <mailto:electricboats%40yahoogroups.com>, "Eric" <ewdysar@...> wrote:
>> >
>> > Brian,
>> >
>> > You will need separate chargers for your AGMs and Lithium banks. The
>> batteries have significantly different charging needs. Elcon chargers
>> have different charging profiles available for the common LiFePO4
>> battery brands on the market. Be sure to confirm that any charger that
>> you are considering has lithium specific profiles available. I spent a
>> couple of months trying to get a properly configured charger from
>> Delta Q, but the factory finally said that they would not release
>> their lithium profiles unless I had bought ALL of my storage
>> equipment, including batteries and BMS through one of their distributors.
>> >
>> > But I agree with you, there is no sense in throwing away perfectly
>> servicable equipment when you can transition slowly from one
>> technology to the other. If I were to set up both banks, I would put
>> contactors on both the positive and negative leads from each battery
>> bank so that they can be completely isolated from the other and the
>> drive system. With the chargers wired to the battery sides of the
>> contactors, each bank can be charged independently. One bank can be
>> "activated" to the drive , while the other is being charged. One
>> drawback that I could see is the need for separate instrumentation to
>> track the current in and out of each pack, if you are so inclined. But
>> this configuration should work fairly well.
>> >
>> > Fair winds,
>> > Eric
>> >
>> > --- In electricboats@yahoogroups.com
>> <mailto:electricboats%40yahoogroups.com>, "Brian Holt" <drmsudo@> wrote:
>> > >
>> > > Eric- thanks again. I am thinking of one add on bank of LI then I
>> will be able to continue to use the current agm batteries I have with
>> the charger. The future will hopefully hold a much better system. This
>> way I continue to get the $ out of my current design and expand it
>> with the new. Do you know about the charger that will work with my
>> Honda 2k? Thanks.
>> > > Brian
>> > >
>> >
>>
>
>
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