T-Pain Is On A Boat: Re: [Electric Boats] Feasible to change to 6v golf cart batteries?

I have charged a 36V system and a 12v house battery. I used 10watt panels and connected them 2p3s to the traction battery and then 2p to the house battery.
All 8 panels mounted nicely to an aluminum frame I had left over from my old single glassed house windows.

My boat sat all week in the sun and I only used it on the weekends.
I also didn't have too far to travel.

--------------------------------------------
On Mon, 6/12/17, Daniel Michaels nov32394@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:

Subject: Re: [Electric Boats] Feasible to change to 6v golf cart batteries?
To: electricboats@yahoogroups.com
Received: Monday, June 12, 2017, 7:40 AM

Captain Carter,
I
am getting ready to do solar on my boat. I am running 60v.
Can you give me some advice or part numbers for a system.
The boat is only 26' & 8' wide so I will only be
able to get two panels over the cockpit. I want to be able
to charge the 5 twelve volt batteries in a series and one
lone twelve volt. Maybe I need two solar systems. A small
one for the one battery.
Dan

Sent
from Yahoo Mail on Android

Mathew,
That's
pretty much exactly the way my Flexmax 80 solar charge
controllers works. All the threshold voltages, absorbsion
times, float voltage, and equalization cycle intervals are
programmable. Trojan has great documentation and it was easy
to look up all their charge recommendations but when I went
to put them in it turned out they were the default settings
from Outback.
On a
sunny day I can feed my little "golf cart motor on
steroids" about 70 amps almost all day regulated by the
mppt charge controllers, leaving the batteries topped off if
it's good and sunny out. On partly cloudy days the
batteries make up the difference. It takes about 50 amps to
do 3 kts and at 70 amps I get just over 4 mph which is a
little slower than the diesel. When I'm in the sweet
spot with the sun on the solar array I can get over a
100amps which only gets me up to about 4 kts though. It
takes about 150 amps to hit 5 kts so I don't go 5 kts on
electric for long.
The sweet
spot on the diesel is 5 kts and it can give you spurts of 7
kts but not for long as it heats up fast at anything over 5
kts. The best thing about the electric, beside free fuel, is
the reostatic control you get on the prop in close quarters
around marinas. It is so much better than the diesel because
as soon as you engage the transmission, the boat wants to go
3 mph at idle speed. Makes for a lot of banging the
transmission on and off while you lurch around. I always
dock in electric mode.
Capt.
Carter www.shipofimagintion.com

On Monday, June 12, 2017 12:43 AM,
"Matthew Geier matthew@acfr.usyd.edu.au
[electricboats]" <electricboats@yahoogroups.com>
wrote:

On
11/06/17 13:11, boat_works@yahoo.com
[electricboats] wrote:

Whoops, forgot the link!

Here's
the link to a BMS for 6V or 12V lead acid batteries:
http://www.manzanitamicro.com/products?page=shop.product_details&flypage=flypage.tpl&product_id=87&category_id=22

The charger for my Trojan flooded batteries
'balances' by a
controlled over charging at regular intervals. (i.e, not
every
charge, but at some regular interval) The charge profile
in the
charger is supposed to be specifically set for
Trojan's recommended
charging profile. It relies on the batteries being able
to 'safely'
gas and that the user regularly checks the water levels
or has a
automatic watering system.

36 and 48v lead acid systems are common on electric
forklift trucks
and other similar warehouse equipment.

My batteries are not in sealed boxes and the boat is
quite open so
the hydrogen can easily dissipate and not hang around
looking for
trouble.

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Posted by: Mark F <mark.internet@yahoo.ca>

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