Jako

Verry good price 
Max charging amps for a single string 30A. Max charging for 5kva 60A solar + 60A utility.
Just limit the max charging amps in your settings.
But my experience you can leave it on 60A due to the agm battery drawing less & less amps the higher the soc. So at 50% DOD the batteries does not pull anything close to 30A. You cannot push amps into a battery. It draws what is required. But you can limit the initial current draw.
Yes they will work for you.

Good day Chris.
I have installed a Freedomwon bank on an axpert inverter. Quite easy, they set the BMS parameters a bit further for the axpert (Still within range) you set the charging voltage 55.6V for float & bulk charge. the axpert throws full amps into the batteries & once it reaches the set volts the amps tapers down to about 1A & they are full.
Annycase, they are expensive initially.
Have a look at these, I think mantech made a booboo with their price on these. I bought x8, 2 weeks ago, with 4 voltage meters on each 12v battery. I also did a H bridge connection between the parallel banks for balancing.
The DG range of batteries does about 1100 cycles @ 50%
http://www.mantech.co.za/ProductInfo.aspx?Item=370M0075
 

That is the next step.
I normally isolate the PV arry with the isolator(DC), remove the fuses(DC), test the strings one by one for Voc. refuse one string, switch back isolator & see what the string gives me.
It sould either be the inverter or pannel array ?
I will give you feedback as soon as I tested it.
 
One question, If the inverter has an issue. Can I connect the total of 2x6 strings (4500W) to a single inverter while the one is away?
& one sets the max charging current as applicable to the battery ?
This will give you max charging amps early in the day & give you a flat topped curve instead of a nice wave ?