5 minutes ago, superdiy said:

59.2V bulk charging voltage, although the Axpert can only go up to 58.4V.

I asked the question on Trojan's, I would assume same will apply here.

0.8v diffs is fine. I quote: " Sometimes you can even have a 0.8V difference and that will be still fine, especially in Absorption & Equalize."

"Remember charging voltages Absorption, Float and Equalize are NOT like a pin point value no. There are accepted range of values in Absorption, Float and Equalize."

On Trojans and equalizing: "Equalize voltage of 32V (24v system) once a month is also perfect and remember you equalize for 1-2 hrs max."

So 64v on 48v system.

6 hours ago, djacobs said:

 

13 - 54v

16 - cso

The only changes I would make are program 13 and program 16.

I would change Program 13 (Back to battery mode) to about 0.5V below bulk voltage so that you know you have given the battery a good charge before going back to solar. During cloudy weather under your current setup you are going to cycle your batteries without giving them a proper charge. Each person's usage pattern of batteries differes according to their needs. If you need batteries to last may I suggest you set this to FUL and make sure you batteries start each cycle fully charged. You are going to use more Eskom units and inefficiently I might add but you are giving your batteries the very best chance of longevity. A long low discharge would undo this so Program 12 at 46V is good. 

 

Program 16 I would change to SNU. You only get to use utility charging if your output is powered by the utility. If  the PV panels are not producing enough energy to maintain desired charging rate it is augmented by utility power. This is useful in my mind in cloudy weather. If there is enough sunlight PV energy for charging gets priority.

Only make these changes if you don't mind charging with utility and change program 11 so that it is the same as program 2. Your current program 11 setting is for trickle charging (a maintenance charge) from grid. Since your batteries health may already be compromised I would make setting 2 and 11 => 30A.

 

Further your settings look good.