3 stage charger for true deep cycle battery (Trojan T-1275)

Victron also makes the short list for adjustable charge rates--but be prepared for sticker shock.

I really prefer AGM jars as there is little maintenance required. Look into used surplus acid telcom 12 volt.

Both Xantrex and Magnum make Inverter/Chargers that are fully adjustable to those voltages.

And it's Friday the 13th... The T-1275, due to it's shape and proportions, is a bugger to get fully charged. It takes a lot of time to get it top charged. It's shaped more like a car jar.

If you are serious and want the least amount of effort to get as near as possible to fully charged while camping, I would suggest a pair of Trojan T105 GC2 6V batteries, and wire them in series for 12V. They are much less effort to bulk charge, absorption charge and top charge, as well as equalize. They are the proper, most efficient shape and relationship of lead plates to battery acid, hands down.

Just saying, as I have some hands on experience with a couple of T-1275's. Great batteries, powerful batteries, but it takes a long time to get them fully charged, or equalized, not the best attribute when camping with them with running a generator and solar panels. And if you are hooked up to a pedestal, you really don't need GC-2's or a T-1275.

Closest converter is IOTA. Otherwise I recommend a Morningstar solar controller that most definitely can be programmed to exactly those voltages and adjust for temperature. Temperature compensation coefficient is also adjustable so get that from Trojan also. Only trouble might be winter snow and sun issues.

Hahahahahahahahahahahahahahahahahaha...

Your question made my day. Been a sore point since Xylophone Tonkatoy purchased Trace*. You need to set the length of time spent at 14.8 as well.

Take a look at the MEGAWATT manual charger and set the voltage to 14.8. Use an INTERMATIC 4-hour spring wound timer to adjust time. The Mega WILL equalize at 16.2 volts but at not more than 20 amps max. Get the 36 amp model. I use multiple 36 amp Megawatts rather than charge incorrectly.

An old old TRACE 2500SB inverter charger is the best battery charging device ever built. good luck finding one.