Progressive Dynamics charger/converter for 2 Trojan T-105’s

What brand of converter do you have? AGMs do have a slightly different charging algorithm.. is that what you're asking about?

The T-105 isn't an AGM, it's flooded. The PD converter that I have won't deliver the charge voltage that Trojan specifies for the T-105. If you're really going to dry camp a lot and in sunny places, you might want to consider solar charging. It takes a lot of generator hours to fully charge batteries.

Charging instructions for the AGM T105 here. Note the 217AH vs 225 for the Flooded T-105 if that matters to anybody.

http://www.trojanbattery.com/pdf/T105-AGM_Reliant_DS_Final.pdf

PD has a newer version of their standard converter that does 14.8 instead of 14.4. However, that would only be needed to do the "finish charge". Your 14.4 would do for normal recharging, but do have the Charge Wizard to be sure you can get it to do 14.4 instead of just 13.6.

If you fast charge at say a 25% rate, that would be 54.25a so a typical 55 amp converter should be just right.

pauldub wrote:
The T-105 isn't an AGM, it's flooded.

Maybe the T105 comes in an AGM version. Just maybe.

Perhaps OP should put that in the Subject since so many people only read that.

Yes the Trojan T-105 does have an AGM version which is what we’re buying.

http://www.trojanbattery.com/product/t105-agm

Thanks!

In desert? Put some solar on the roof. The issue with charging battery correctly is more about getting it to upper 90% than keeping correct voltages, and generators are not good at getting it to 99.9. Takes a lot of time.

Converter should match Bulk/Absorption voltage of your AGM. And fit into space where the old converter is living now. There isn't much else to it.

With No solar and generator I would not fear running the PD-9260-14.8, that has the 14.8v absorptoin voltage instead of the regular PD 14.4v.

Getting to 100% is important for any lead acid battery but especially so AGM's. I would not recommend going more than 7 deep cycles without getting to that desirable endgoal, and after 7 cycles it might require significantly more time at absorption voltage for amps to taper to 0.5% of capacity(20hr rate)

A hundred watt solar panel has the time to hold the batteries at absorption voltage, silently, after the generator has gotten the batts to ~90%, and can greatly extend battery lifespan.

IMHO buy the biggest PD unit you can run with your generator. 65/75A is about the limit for most 2000VA generators.

and if the trailer came with the (in)famous WFCO generator, yes going to a PD is a good idea. If so, put in the PD drop in replacement, good to go, I think they make a 55A and 65A drop in replacement.

Now if your generator is 3000VA or bigger, then you could get a 100A PD mount it in the pass through, and be good to go.

+1 on the 9260 14.8 Voltage sags a bit on these anyway.

http://www.bestconverter.com/PD-9260C-148-60-Amp

Hey you guys are VERY helpful.

It’s an 8000w Generac generator.

I started another thread about our rig being solar ready.

I can add solar panel but am not sure what other things I need to do this besides solar panel.