AGM vs Flooded Bulk Times
PT keeps asking whether AGMs will spend more time in Bulk at the same charging rate. I found a good example where that can be measured, using ah64id's test with his PD4655 on his pair of Lifeline...
Forum Discussion
BFL
Seems to me
Dealing with one or two batteries at 50 percent SOC and a 40 amp charger
Makes this kind of an academic exercise, just spinning wheels
Get out that 100 amp charger, and see which battery will accept the amps and charge up fast, making for a shorter generator run time
# there is good reason to have agm instead of wet if you have limited generator window time
# there is good reason to have a big charger capability if you have AGMs,
Charge them in the shortest amount of time and be done with it
# if you have all the generator time in the world and don't care how long it takes buy wet cell
# if you do not intend to increase charge capability to match AGM acceptance ability..and shorten generator time, Don't buy AGM
Comparing wet to AGM without measuring amp hrs discharge, and the amount of time to return that exact number of amp hrs into the batteries
Is not a valid comparison
This whole discussion is academic, and shows how to, NOT do a proper comparison test
Wet cell GC 6v offer the most capacity per dollar at retail level
# you can't beat surplus Telco AGM for the best value for the dollars
$350 bought me 675 amp Hrs of AGM Telco batteries, 525 pounds of AGM power
You do have to work at finding these, you can't go down to the local Costco
And you can't buy them from eBay or Amazon, well maybe new $400 each
They are tall and heavy, you have too have room for them
Not everybody can do this...but this is just side note not germain to the charging differences
Seems to me
Dealing with one or two batteries at 50 percent SOC and a 40 amp charger
Makes this kind of an academic exercise, just spinning wheels
Get out that 100 amp charger, and see which battery will accept the amps and charge up fast, making for a shorter generator run time
# there is good reason to have agm instead of wet if you have limited generator window time
# there is good reason to have a big charger capability if you have AGMs,
Charge them in the shortest amount of time and be done with it
# if you have all the generator time in the world and don't care how long it takes buy wet cell
# if you do not intend to increase charge capability to match AGM acceptance ability..and shorten generator time, Don't buy AGM
Comparing wet to AGM without measuring amp hrs discharge, and the amount of time to return that exact number of amp hrs into the batteries
Is not a valid comparison
This whole discussion is academic, and shows how to, NOT do a proper comparison test
Wet cell GC 6v offer the most capacity per dollar at retail level
# you can't beat surplus Telco AGM for the best value for the dollars
$350 bought me 675 amp Hrs of AGM Telco batteries, 525 pounds of AGM power
You do have to work at finding these, you can't go down to the local Costco
And you can't buy them from eBay or Amazon, well maybe new $400 each
They are tall and heavy, you have too have room for them
Not everybody can do this...but this is just side note not germain to the charging differences
