Replace converter with 24v PS and Solar Controller

OP,
Do you already have the Tristar controller? Why not just get solar panels for it and use the Tristar as designed? I have mine programmed for 14.8V absorption and 15.3V equalization with temperature compensation. It works great.

As mentioned, the onboard converter with lower voltage will still charge the batteries if given adequate time. It will just be your backup/emergency charger.

PWM controllers don't change voltage. They just turn the input and and off very fast to keep a battery from getting charged up too much. MPPT controllers actually convert from one voltage to another with a DC to DC converter circuit.
Solar panels behave very differently than power supplies. You can short out a solar panel and it won't matter. They are a current source, not a voltage source. They will just put out their rated current at whatever voltage they are connected to.
Why purchase a 24v supply and a charge controller for probably about $1,000 when you can buy the proper programmable inverter/charger and get a very nice inverter in the deal?

Clicky for above link

The TS-45 has no DC to DC voltage converting circuitry in it like an MPPT control would. A power supply does not behave like a solar panel.
You can call Morningstar and ask them but I don't think it will work.

I bet it will work. I have owned a couple of the MS Sunsaver PWM controllers, and they can accept a power supply as input. If he already owns the Tristar, and if MS allows it, it should work.

Even PWM controllers convert one DC voltage to another, so I don't get your thinking on that.

I find it odd that the absorption charge is so close to the equalization charge. You will be equalizing at every charge cycle. And you will have to isolate the battery bank from your rig every time you charge.

A longer absorption charge at 14.8V and equalize more often, say once a month depending on how you use them, may be in your future.

They will reach full charge at a lower voltage it will just take longer. The some what lesser charge rate might actually be better for along life. When in doubt call an Interstate engineer.

The TS-45 has no DC to DC voltage converting circuitry in it like an MPPT control would. A power supply does not behave like a solar panel.
You can call Morningstar and ask them but I don't think it will work.
I recently replied in your first thread. I think your best bet is to purchase a good, programmable charger or inverter/charger. They do exist. There's no reason to cobble together devices that weren't designed for this purpose as an experiment.

Oh OK, so they are interstate.

This is weird. Too bad you didn't know this before buying them.

https://www.google.com/url?sa=t&source=web&rct=j&url=http://www.interstatedealers.com/pdf/201535.pdf&ved=0ahUKEwjRo--M-dzKAhUO7GMKHcLoCUwQFgg9MAQ&usg=AFQjCNFSKnh1sijmuAK1C2lAUAJGoPzLOA&sig2=tPB0q_bArQhiC_3EilPpPg

X2 where did it say to charge at 15.3
I have four Sams gc 2 and an industrial equipment/cart charger (Quick charger brand)that will do a 15.2 volt top charge. When I was running on generator only last year I would sometimes let it go to that voltage but usually only 14.8 or so. Generator times were short and water use went up. They bubble too aggressively.

Another upgrade that I did was add a Progressive Dynamics converter that goes to 14.4. That works much better than the 13.6 model. If you go solar with voltage adjustment you may do 14.6 or 14.8 with no problem and some controllers allow equalization.