inverter / charger

[Stephen Birtles]

Magnum is good stuff
Stephen 77fc35


--- In WanderlodgeForum@yahoogroups.com, "" wrote:
>
> Ebay seller has an Magnum MS2812 inverter/charger for sale. Would b
a good replacement for the original system on my pt40? He says it's
pure sinewave? And new.Marvin SkaggsBuffalo, Ky. 427161984 PT40--- On
Sat 05/26, Tom Warner < warbucks@... > wrote:From: Tom Warner
[mailto: warbucks@...]To: WanderlodgeForum@...: Sat, 26 May 2007
08:39:06 -0400Subject: Re: [WanderlodgeForum] Re: inverter / charger
>
>
>
> Greg the house batteries are "used up" as you put it and I assume
that means have to be replaced because very few coach owners
understand how to properly size their charger/inverter and connecting
cables and wiring and to properly care for and manage their batteries.
They discharge below 12V simply because few coach owners have an
accurate way of monitoring their condition from inside the coach and
in real time. As you note one way to keep the batteries from
discharging below 12V is to install an automatic generator start but
in my opinion that does not help with monitoring the condition etc of
the batteries, alternator and generator outputs.I for instance have
installed new batteries in my 1985 PT 40 (six 6VDC deep cycle
Interstate batteries) simply because the former owner installed 6 red
top Optima 12VDC batteries as house batteries. They were the wrong
kind (red tops are for starting not deep cycle) and only 55AH each
which is not adequate for this coach. Also installed
> all new 4/0 battery cables and to and from the charger. Also new 10
gauge cables from the main power panel to the charger and from the new
subpanel to the inverter. I also installed a new subpanel for the
inverter and switched all of the inside receptacles and the microwave
and electric curtains over to the subpanel. Also installed a link 2000
which will monitor the batteries and their condition, the alternator
voltage and current, the generator voltage and current, and will show
the hours for the batteries to get to any voltage I set it for which
is 12.3V for mine. With the Link 1000/2000 I can monitor the current
draw of every device inside the coach that operates from 12VDC,
monitor the condition of the batteries etc. To me this is a powerful
device as it gives me confidence whether boondocking, on the road, or
at a RV Park plugged into shore power as to the condition of
everything in the coach.The charger or alternator will also charge the
battery efficiently if the
> original circuits are kept in good repair and checked so that we are
assured they work properly. I have helped several others troubleshoot
their generator charging circuits and I am told they now work.If you
do a lot of boondocking then you should calculate your 12VDC loads so
you can install the best battery bank , charger/inverter to
efficiently handle it. A good source for that
ishttp://www.phrannie.org/battery.htmlht...rt.htmlYou
can use the OEM battery chargers but they are very inefficient,
overcharge your batteries causing them to fail prematurely and really
should be replaced. I strongly recommend the Xantrex Freedom 458
series charger/inverters with the Link 1000 or 2000 controls. I would
buy a refurbished unit if they are available.As for your comment of
"current going to the batteries from the house 110 chargers" that is
only possible if you do not separate the power to the charger from the
power from the inverter. That is resolved by
> installing a subpanel that has the circuits for the microwave,
electric curtains and inside receptacles in my case and powering the
charger from its original breaker in the main power panel. These are
some of the issues we are going to discuss at the June 8-10 rally here
in Vernon,NY along with working on some of the coaches in
attendance.tom warnervernon center,ny1985 PT 40At 12:54 AM 5/26/2007,
you wrote:>Howard, It seems that the rigs that have seperate engine
batts , keep>that bank longer than house batt bank.I think the
house bats get used>up because they are depleted past 12 v often.
the auto genny/starts>will keep the house batbank closer to 12 and
I think help keep the>batteries longer.>>Motorcoaches go
through alts on their engines and I wondered if>current going to
the bateries from the house 110 chargers harms the>alts??. Are the
alt to battery path diode protected??? if the diode>fails will it
fail making two way contact or stop any
> flow???>>GregoryO'Connor>94ptRomolandCa>> --- In
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