inverter / charger

[marvinskaggs@...>]

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
WanderlodgeForum@yahoogroups.com,
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