UPG 250 amp hour agm batteries
I just finished up my residential refer install with inverter. I have two 75 amp hour batteries that will suffice for now. But this worked so great and I had so much fun with it, I started searching ...
Forum Discussion
Generally the fewer connections in series (or the more in parallel) the lower the over all resistance so less voltage drop.
You say these batteries are 250 amp hours.. Now that is one of the battery sizes that come in Six Volt (I think it's the "Large" size golf car battery, the standard golf car battery is a "Small) but it's also about a 12 volt size 8-D (Among, I asume other sizes)
The biggest issue with the 8-D is it's one heavy battery, if you can wrangle it (i can but I'm kind of big too) it's a good battery.
AGM, however.... They like to brag about the AGM batteries.. I'm not sold. But here are some facts.
Some brands do, it appears, have lower internal resistance, most notabilly LIfieline, Lifeline recommends a much faster initial charge rate than any other Lead Acid battery out there (Like up to 10 times as fast as the rest) However for "Generic" AGM.. Xasntrex (They make inverters) recommends the exact same re-charge rate as for flooded wet cell. NOTE that I'm attributing the recommendations. you can check it out, The info from Xantrex is in a Prosine 2.0 manual.
Now personal experience
I used to have two independent 12 volt systems in this house. The factory installed "House" system consisted of a pair of Interstate U-2200's (These are a GC-2 Golf Car battery, Flooded wet cell) they are now 8 years old and thus the oldest batteries in the house. they still go strong.
The other consisted initally of a pair of Group 31 AGM's. this is about 250 amp hours total, they were the FIRST TO DIE, they were babied by the Prosine. I later added some Group 29's (Maintenance free) but kept the program on the Prosine set to AGM. The Group 29's were older than the motor home (used for standby power at home) and outlived the AGM's.
Considering the way way way higher cost of AGM's you can see why I remeain unsold on them.
However many on the forums say they are the greatest thing since Edison.
So I leave it up to you..
You say these batteries are 250 amp hours.. Now that is one of the battery sizes that come in Six Volt (I think it's the "Large" size golf car battery, the standard golf car battery is a "Small) but it's also about a 12 volt size 8-D (Among, I asume other sizes)
The biggest issue with the 8-D is it's one heavy battery, if you can wrangle it (i can but I'm kind of big too) it's a good battery.
AGM, however.... They like to brag about the AGM batteries.. I'm not sold. But here are some facts.
Some brands do, it appears, have lower internal resistance, most notabilly LIfieline, Lifeline recommends a much faster initial charge rate than any other Lead Acid battery out there (Like up to 10 times as fast as the rest) However for "Generic" AGM.. Xasntrex (They make inverters) recommends the exact same re-charge rate as for flooded wet cell. NOTE that I'm attributing the recommendations. you can check it out, The info from Xantrex is in a Prosine 2.0 manual.
Now personal experience
I used to have two independent 12 volt systems in this house. The factory installed "House" system consisted of a pair of Interstate U-2200's (These are a GC-2 Golf Car battery, Flooded wet cell) they are now 8 years old and thus the oldest batteries in the house. they still go strong.
The other consisted initally of a pair of Group 31 AGM's. this is about 250 amp hours total, they were the FIRST TO DIE, they were babied by the Prosine. I later added some Group 29's (Maintenance free) but kept the program on the Prosine set to AGM. The Group 29's were older than the motor home (used for standby power at home) and outlived the AGM's.
Considering the way way way higher cost of AGM's you can see why I remeain unsold on them.
However many on the forums say they are the greatest thing since Edison.
So I leave it up to you..
