Residential fridges

[Gregory OConnor]

When a motorhome passes from dealership to dealership the good
batteries dont pass with the motorhome. not saying that dealers are
bad or in the wrong just saying you should ask to find a coach on
the lot to switch batteries with befor you write the check.

GregoryO'Connor
94ptRomolandCa


--- In WanderlodgeForum@yahoogroups.com, "Don Bradner"
wrote:
>
> Pete, I note that in the past you've said similar things, and
suggested they were the reason your batteries were shot when you
purchased your Bird.
>
> Having purchased a new RV in the past with shot batteries I
understand that is not uncommon to find bad batteries at purchase.
Salesmen are very poor at leaving coaches hooked up, and they
routinely run the batteries to full discharge (10.5 volts or so); no
battery likes that very much. Your coach sat on at least two lots
prior to your purchase, and that's a possible explanation, but not
charge voltages.
>
> I think if you review the Link 2000 manual you will find that what
you quote below is AGM float at 120 degrees, and Liquid float at 70
degrees. Apples and Oranges.
>
> At 70 degrees, Wet-Cells are 13.5, and AGM 13.3. At 80 degrees
they float at an identical 13.1. Nowhere is there enough difference
to damage an AGM with wet-cell settings, and AGM manufacturers
generally don't make strenuous pleas for owners to have programmable
controllers - the difference will at most be a small amount of
battery life.
>
> Don Bradner
> 90 PT40 "Blue Thunder"
> Posting today by satellite with AGM power in Quartzsite, letting
the voltage drop to 11.9 before charging (by choice)
>
> On 2/6/2008 at 5:34 PM Pete Masterson wrote:
>
> >Nope... AGMs must be charged at a lower voltage to avoid damage.
I
> >note that the Link 2000R would float at about 13.5 volts with the
wet
> >cell setting, but floats at 12.9 volts with the AGMs. (The
charging
> >rate is preprogramed -- you simply (well, it's not _that_ simple)
set
> >the kind (wet, AGM, gel cell) and the battery size (amp hour
rating)
> >into the controller and it chooses to do whatever it is it does.)
> >
> >The dual inverters in my coach have 4 breakers that control what
they
> >serve. I've not gone to the trouble to figure out what each
breaker
> >serves individually.
> >
> >I can see the advantage of having a smaller, true sine wave (my
> >inverters are modified sine wave, which is less efficient for
the
> >refrigerator) dedicated to the refrigerator.
> >
> >While parked in Oregon, I checked temperatures in the
refrigerator
> >during the day (when the generator was unusable) and it took
about 6
> >hours for the interior to get into the 'danger' zone on the
> >refrigerator thermometer I use.
> >
> >Pete Masterson
> >'95 Blue Bird Wanderlodge WBDA 42
> >El Sobrante CA
> >aeonix1@...
> >
> >
> >
> >On Feb 6, 2008, at 4:56 PM, Ross MacKillop wrote:
> >
> >>
> >> Hi Pete,
> >> Aren't the charger settings for AGM the same as Lead/acid.?
(not
> >> like Gel)
> >> The new 450 LXi has a single smaller inverter for the fridge
(1500
> >> true sine wave.) I turn the 2, 3600 watt ones off and turn the
> >> fridge down(really up) for night.
> >> Ross
> >> Palm Desert
> >> ..<snip>
>