Sizing a replacement converter
I'm planning on upgrading the old (loud, single-stage) converter in my '98 Coachmen class C to a PD 9200 series unit, and am trying to figure out what size to get. I'll probably be doing a little boo...
Forum Discussion
Sounds like you need a converter that can be manually forced to hold 14.4+ volts during Abs mode, when necessary; like when boondocking. This usually requires a remote pendant, that allows the op to keep the voltage at the bulk/abs threshold setting, rather than it dropping down to the 13.6v "normal" setting. Others here can direct you to the most suitable converter, in that regards.
As for amperage, I like a C/4 - C/3 rate... so, 25-33 amps for every 100Ah's of bank capacity. A 75 amper on a 225Ah bank would be an example of a C/3 rate, while a 55 amper would be a C/4 rate. (Either of these would be too much for that single 12v.)
But that's for full time and/or extended boondocking. In your case, a C/6 - C/5 rate should suffice. But, again, get something that can be triggered into holding the higher voltage throughout abs mode, and preferably with temperature compensation.
For example, using a C/5 rate, i.e; a 45 amper on a 225Ah bank, at sufficient voltage, you could do a 50-80% in about 90 minutes, and a 50-90% in under 2 1/2 hours. You'll know when you're at 90% soc once amps taper down to about 5a for every 100Ah of C (at 14.5v), or about 8a for every 100Ah of C (at 14.8v).
As for amperage, I like a C/4 - C/3 rate... so, 25-33 amps for every 100Ah's of bank capacity. A 75 amper on a 225Ah bank would be an example of a C/3 rate, while a 55 amper would be a C/4 rate. (Either of these would be too much for that single 12v.)
But that's for full time and/or extended boondocking. In your case, a C/6 - C/5 rate should suffice. But, again, get something that can be triggered into holding the higher voltage throughout abs mode, and preferably with temperature compensation.
For example, using a C/5 rate, i.e; a 45 amper on a 225Ah bank, at sufficient voltage, you could do a 50-80% in about 90 minutes, and a 50-90% in under 2 1/2 hours. You'll know when you're at 90% soc once amps taper down to about 5a for every 100Ah of C (at 14.5v), or about 8a for every 100Ah of C (at 14.8v).
