Alcatel Lucent 12AVR145ET Telecom 12 volt AGM batteries for off grid

new2PV said:

Vic according to the manual the temp comp. parameter is the system voltage, its nots not the VPC. volts

Hi new2..,

Well,  am not quite sure what you are saying.

In  the Manual that I had linked to,  there is NO Temperature Compensation value noted,  in the useful and customary --XX mV/Cell/degree C that I could find.   The manual does have a table,  with a range of temperatures,  verses a fixed charge voltage for 12 V batteries.   NOT very useful.   I just tried to calculate that the compensation value per Cell per degree C,  from that step-wise table.

For the exact batteries in question,  do you have the value of compensation/Cell/C??

Thanks,   Vic

Hi new2..,

Well all of us are quite familiar with the Industry-Standard pracitce of stating the Temp Comp value as mV/Cell?C.   Just who scales this comp factor to the number of cells, matters little,  as almost all of us think in and refer to this comp factor in mV/Cell/C.

 If Schneider chooses to do things differently,  this is good,  but,  to me it will always need to be in mV/Cell/C,  otherwise it will get in the way of communication,  as it did earlier in this Thread,  IMO.

It appears that Schneider is into making things easy on itself,  and its programmers,  by forcing customers to scale things,  and to lie to Schneider Hardware about battery bank size,  in order to scale EA,  and so on.  It is all about saving a few pennies per unit,  in lines of code that does not need to be written and ACTUALLY Debugged ...   but Schneider will always be Schneider ...

FWIW,   Vic

Hi new2PV,

Am certain that,  really,  Schneider really does NOT care at all.   They have their ways of doing things.   They are a huge German company,  and it seems that the customer needs to conform to them,  rather than the inverse of that.

They can make fairly good products,  but if one is waiting for some new FirmWare to fix bugs,  or crazy behavior,  the wait may well be a decade or more.   BUT,  for the off-grid systems here,  believe that the Conext XW Inverter/Chargers would be OK,  if we need to replace any of the Xantrex SW+es (sure hope that that need does not arise).

FWIW  Thanks,  Vic

New2,

I would not touch the current conext SWs.  These old Xantrex SW+ 5548s,  here,   are about 12 years old,  and have a design life of about 20 years,  if not abused.  Very solid,  at 140 Lbs each,  but someday some unobtainable part will croak ...   probably should snag a couple of spares.

Yea,   agree that the Schneider SWs are not that great.   Opinions,   FWIW,   Vic

Hi bobertcom,

I know nothing specifically about these AGMs,   but,   some/many AGMs can require a   L O N G  Absorb time,  but I know nothing about these batts,   especially in cyclic use.

Good Luck,   Vic

If you follow their suggestion, you should observe the decreasing  charge Amps finally level off, and it should be close to ~ 1% of the batteries rating. Top do this you will need a good long day of sunshine  capable of charging your bank for > 6 hrs, otherwise you will never get that far unless you  do a bulk charge first with a gen or grid charge them let the sun take you towards zero Amps..

In the winter I use that setting as there is only 3 hrs max sun in the coldest days of the year...

have fun...

Mike,  this does not happen with the schneider charge controllers with AC loads. It can with DC loads. They are measuring DC amps to end absorb on the Mppt, SCP, or combox.
If the OP wants to test if end amps are set right, just wait for a day when you complete charge and force bulk. The controller should slowly settle to the end amp setting (within 10 minutes or so) and go to float.

What does your battery maker want? Always do that unless you know more than they do.
 25.2 in the morning before sun with small loads is good!

Who set up your devices???? Not a pro I hope? hint, they should not all be the same number. Good Luck!
"when in doubt read the manual"