Need suggestions on house battery replacement
Getting ready to upgrade my house batteries and thought I'd lay out my gameplan. For 12 years I owned a 1993 Pace Arrow DP on an Oshkosh chassis. Shortly after purchased I replaced the 4 six volt h...
Forum Discussion
mchero wrote:
Almot
Your looking at the wrong numbers.
Not getting enough absorb voltage when the Xantrex Freedom is charging via shore or generator!
I have 4 of the Interstate GC2-XHD-UTL
Take a look at this link & scroll down to the last chart, the 6 Volt section. 7.65 x 2 = 15.3
http://www.batteries-faq.com/activekb/questions.php?questionid=1
Now, If you pull up the PDF on the Xantrex Freedom 458 user manual you can take a look at the charge rates for wet cell.
http://www.xantrex.com/documents/Inverter-Chargers/Freedom-458/Freedom458(445-0193-01-01_rev-2).pdf
Note the Interstate data assumes 80 degrees.
The Xantrex Wet Cell charge rate at 80 degrees is Accept at 14.2
Interesting eh?
Now for solar I have 4 Gigabit 255 watt higt voltage panels in two paralleled strings. Midnight Solar 200 Light charge controller.
I set the accept voltage to 15.3 for a duration of 3 hours.
Wen I returned at 5:00 PM I found the controller in float! BUT I don't think I got a full 3 hours of absorb, some thin clouds moved in.
The numbers I'm looking at now are promising! I'll continue to let the charge controller juice them up.
While in Havasu sniffin around I did find a shop that had the T105's for $120.00 I was shocked! He also had some L16's in the 330ah range BUT he only had three! I got some measurements I will see if I can even get the big bastages in their! I don't know what he is going to do with three of them! I think he said they where about $300 a pop
Interstate battery does not manufacuture any batteries. Your battery is made in Mexico by a factory that was built by U S battery. It is a hybred battery, low Antimony positive plates and calcium negitive plates.
Now for the "fun" part. Interstate has posted the charging profile in a incorrect way. I suggest that you "do NOT" absorb at 15.3 volts. Absorb at around 14.7ish after the battery is charged then you clamp the amps at 3% of the C20 rate (232 ah would be 6.96 amps) and allow the voltage rise to 15.3. Most chargers used in RVs are not capable of doing this type of charging profile. Not controlling the amps correctly will cause excessive buckling and shedding of the positive plates (this is a mini equalize)
Find a profile that works with your equipment here. U S Battery charging profiles
