Lead Acid Battery - 2 Cells No Float
So I picked up a new (to me) rig from family last weekend. It had been sitting at the BIL's place for several years. He started it occasionally, but never kept it plugged in. 2 of the 3 group 29,...
Forum Discussion
BFL13 wrote:
The 1093DBD can start the recharge with the batt at 50% or whatever, and it runs at 4 amps with the green light flashing, but still at 14.8v until it gets the batt "full" and then all by itself it shifts to 15.7 to do the equalize part, but it is a smooth ride all the way from 50% to when the amps taper at 15.7 till it says "FUL" so it can take a long time but is all automatic.
The inverter charger and the 1093 can both work together as long as the generator has enough VA to run them both. Set the Xantrex to 14.8v or near that so they add their amps most of the way up. Once the total amps taper to what one of the two chargers can do by itself, you can yank the other charger. Solar will add its amps too while that is going on if the controller setting is near 14.8v
The 1093 has temp comp so matching its voltage with a charger without temp comp means first you have to see what the 1093's voltage is at the time--but it has its own voltmeter. At 35F, the 1093 can be over 15v instead of 14.8. It can be 14.6 when it is above 77F. Start the 1093 first to get it going and then the other charger. Sometimes it will show a fault if it sees the other charger already on the batt. Not always. Depends on their relative voltages and the temp comp with that. Start the lowest voltage charger first.
A T-1275 is about 83 lbs and rated at 150AH. They are bigger than a 6, so "measure twice and cut once". I got my two second hand out of a golf cart that had four at 48V. They were down some in capacity but I got them up to about 135 and they lasted me five years :) New ones would be awesome.
Stay away from those big 12v 31s! Was a long thread here about a "Screwy 31" he had trouble with. Don't get that with T-1275s. 6s are not all the same for quality etc, it seems. I have the Deka 230AH G15s that are maybe the best 6s I have owned. Only had them a year though.
Lots more good info here!
Yeah, I had the 25A version of the 1093 for a long time. I had bought it before I was an RVer. Otherwise I would have sprung for the 40. So I know how they work. That said, I didn't know that you could use the 4A setting and the 1093 would finish with an equalizing. If the 25A version did that, I never knew it.
You and I had talked a lot about how these Vector units had the best quick charging algorithm going.
And yeah, we always knew more than one charger could run with another concurrently. Since the last owner blew his up somehow (from an estate... so he can no longer tell me how he did it,) I'm a little concerned about repeating history. So I was just curious if the Xantrex will have some kind of problem with it. And FWIW, I always ran at least 2 charges. Sometimes 4 (in honor of an old rv.net buddy who's very near and dear to your heart.) And I never had an error message in that regard.
The generator is a 7,500W Onan diesel.
My battery tray actually has more width than height. I can fit the GC2s, but wouldn't want to go much taller. There's room on either side of the 29s and plenty of room in between the 3. So the T-1275s will almost certainly fit. But yes. I will definitely measure first, to be sure. And I know a guy with a golf cart company in town. I wouldn't mind getting some on the cheap that I could restore. But yeah... Trojan actually quotes them at 160. So 480 sure would be a nice starting point!
Interesting about the 31s. Thanks for the tip! I was actually considering that as a possibility. I had noticed they're not easy to find. Perhaps that's why?
More and more I'm liking the idea of 3 - T-1275s. I mean... isn't my family worth it?
