Originally Posted by 28CCD
...Just curious, what would you choose to do if you were me?...
well lets c...
i'd start by giving the 28 footer away and buying a 34.
oh wait, i already did that...
Originally Posted by 28CCD
...is there anything more than "choose Group 24s (probably the Lifeline g24 or Concorde/Sunextender brand/label)" that you think I should concern myself with?
Is it really that simple? If so, I'm all in.
yes it's really that simple.
now to complicate things or UNsweep the previous sweeping overly simple content.
keep in mind this info if from just another silly stream owner
and not from a vendor, juice wizard or any OTHER expert on these topics.
so reject/accept any/all/none of what follows.
1. the original pic doesn't show the entire battery box...
group 27s are just a tad longer (1-2 inches) so IF there is space in the box...
replacing with g27s would boost capacity/reserve ~20 %.
many folks ALTER the battery box with a taller lid so that it can accept 2x6v batteries...
that would NOT be my choice,
but the point is IF you wanna alter the box/space a LOTTA other options become viable.
2. charger, again IF u still have the oem charger and it still works, it will work fine.
every battery maker can provide info on the "ideal" charge profile for their products...
for example, lifeline recommends for most of their 12v agms...
~14.2-4V bulk charge and 13.2-4V float charge (as i recall) ...
the p'lax provides ~13.7-8 V,
so it doesn't FULLY utilize the faster/bulk charge rate that IS a feature of agms...
and it doesn't do the low/slow float thing either.
but the lifeline "ideal" charges noted above are also spec'd at 70 degrees F...
each 20 degrees colder and the general rec' is use 0.5 volts higher,
and each 20 degrees warmer and the charge voltage should ideally DECREASE by 0.5v...
so even the "ideal" profile is fudged for anything BUT 70degrees F.
my unit tends to be full time plugged in when it is COLD, so a float of 13.8 V was pretty good.
and rapid charging (with full hookups) typically happened when it's HOT OUT...
so again, 13.8 V is pretty close to that temperature compensation charge need.
does this make sense?
now that i'm using a multistage charger the batteries get 14+ in bulk stage and 13.4-5 at float.
but they were already 4 years old at the charger upgrade and are now 6 years old,
so it's not clear that they will LIVE longer with the fancy smancy charger.
the point being a NEW charger, as a sometime soon upgrade would be nice, IF switching 2 agms ...
but along with MULTI stage, it really needs to be 'temperature compensated' as well.
IF u wanna provide "ideal" charging to a set of lifelines that function in a W I D E temperature range.
looks like 2x g24 or g27 is gonna run 400-600$...
and new truly intelligent charger is about 1/2 that as an extra.
the solar panel/s have a separate charger,
but IF the stream is plugged in 24/7/365 a new smarter charger isn't a bad idea...
lifeline suggests their agms are good for ~1000 cycles and that many folks get 6-7 years of service.
it's also reported that flooded wet deep cycles are good for ~300-400 cycles.
still thats 2-3 times the money or ~the price of 2-3 sets of flooded wet cells.
many folks report getting only 2-3 years from flooded wet deep cycles.
??is this the 2nd set of batteries in the 04, are those interstates ORIGINAL or replacements??
i like that agms don't require adding water, almost never vent acid/gases and can be mounted in odd positions...
i also like that they REcharge a bit quicker, are less affected by inactivity or temp extremes,
and can be taken a BIT lower at discharge, IF recharged promptly.
just keep in mind that not ALL agms are deep cycle construction...
some agms MARKETED as deep cycle are not made with THICKER plates, the real feature that defined deep cycle...
it really comes down to space available, weight and amp/hour capacity...
concorde MAKES lifelines and also the sunextender.
they have slightly different POSTs and some minor internal differences...
they BOTH come with 1 year FULL replacement warranty,
but the lifelines also come with 5? years of prorated warranty/replacement coverage.
the sears P M DEEP cycle agms batteries (seen in post 6) come with 3 year of replacement warranty...
but they are heavier than g24s OR g27s and with LESS capacity than either lifeline version...
and it doesn't appear ANY of the sears offering are exactly g24 or g27 size/standards...
for some that capacity issue may not matter, for others the warranty may matter more.
my assumption early in this thread was U wanted simple/clear replacement info...
WITHOUT altering the space, wiring or debating the 6v vs 12v thing.
if that's true, simply buy 2 x g24 or 2 x g27 IF they will fit.
and start shopping/reviewing the smarter charger multistage gizmos.