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CaptMP
 
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Bruce-
1) usually a nominal 12 volt lead acid battery is concidered to be fully
charged at 12.7 vdc (measured after 24 hours of no charge or discharge).
12.70 vdc= 100% charged
12.45 vdc= 75% charged
12.20 vdc= 25% charged
11.95 vdc= dead.
You might want to recheck your take of the system........if your two "cabin"
batteries were actually wired in "series", why, that would mean 24vdc being
supplied to whatever is connected to them...........!!!
Probably you are looking at a parallel connection (one batterys + terminal
wired to the other batterys + terminal, and the - terminals likewise wired to
each other) That way the voltage is 12vdc same as always, but your potential
amperage is doubled.
And your inverter that you "never" use probably functions as a battery charger
when 120VAC is connected. If the proper switches are thrown. Do you have any
paperwork what came with the boat? If so, reading it again may help.
Without looking at your boat I can't help, but you need to take a basic
boating electrical course.
Good luck
Mike

sez Bruce" ...I have a Maxum 2400 that has an unusual battery set up. I have 2
starting
batts on a 1-2-both-off switch, and then there are 2 deep cycle batts
connected to a power inverter in the cabin. I have learned that this is a
"poor mans gen set" set up. All batts were new last year, but now the 2
deep cycles are dead, showing 12.5 volts. What i cant figure out is how
they were to be recharged in the first place. They are connected in series
to each other with NO other connections to the engine/charger area. THe
starter batts both are connected to the battery recharger and have little
orange wires from the charger to the pos terminals. So my question is How
do I figure out how these batteries were to be recharged, do you think they
are dead since they have sat since the winter w/o a charge (I was just
assuming they were being charged by something, and we dont use the inverter
ever) We get near 14 volts when running, and the starter batts seem in very
good condition. Any help is apperciat..."

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Lloyd Sumpter
 
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On Sun, 24 Aug 2003 19:07:58 +0000, bruce wrote:

I have a Maxum 2400 that has an unusual battery set up. I have 2 starting
batts on a 1-2-both-off switch, and then there are 2 deep cycle batts
connected to a power inverter in the cabin. I have learned that this is a
"poor mans gen set" set up. All batts were new last year, but now the 2
deep cycles are dead, showing 12.5 volts. What i cant figure out is how
they were to be recharged in the first place. They are connected in series
to each other with NO other connections to the engine/charger area.


(Others have answered the charging question...)

One little point: are these 12V batteries connected in series? One common
setup is two "golf-cart" batteries, which are 6V, which are connected in
series to give 12V total. (that's what I have for the house battery in Far
Cove)

Lloyd

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John Hancock
 
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On Mon, 25 Aug 2003 17:34:04 -0400, "Brice"
wrote:


As for the inverter, we don't use it, and the previous owner apparently
didn't know **** about it, either. Currently it is not working, so I need to
check fuses, DIP switches, etc. It seems to be a nice piece of equipment, so
I don't what it to rot away. The manual talks about LED lights on the unit,
but I have never seen any. Any ideas? Thanks again!


Is the Inverter/charger a Trace, a Heart, a ProSine, or what make
is it? A Trace is top of the line because it takes virtually nothing
to have it on stand-by. The others are all high quality. There should
be a circuit breaker button on the unit. Or you may need to completely
disconnect the unit for five minutes and then reconnect the power.
(The manual doesn't mention this.)
When you're dockside, always plug in to shore power. (Make sure the
inverter/charger is connected to the shore power.)
I would not call this a "poor man's" genset. This is actually
getting good AC power without the noise and upkeep of a genset. I
think you have the better deal.
I use a Trace 1500 watt inverter with a house bank of eight 6 volt
deep cycle batteries wired in "series parallel". (That means 4 sets of
two 6 volt batteries. It's like having 4 big 12 volt batteries.)
The 1500 watt inverter runs a microwave oven or an electric coffee
maker when we are under way. I also have a little electric 'fridge and
we can leave it plugged in all the time.

If you are going to do wiring, look at the Ancor connectors and
marine grade wire. It really is worthwhile to use the best quality.

Steve
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Paul
 
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The 1500 watt inverter runs a microwave oven or an electric coffee
maker when we are under way. I also have a little electric 'fridge and
we can leave it plugged in all the time.


I'm interested in how this setup performs when you're not underway. Is this
something that would be hard on the house bank?

My fridge is ac/dc but I'm stuck without coffee, boiling water etc. unless
on shore power and haven't fully decided my solution.


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