Several questions about Phoenix Smart IP43 Charger 24/25 (1+1) 120-240V

DIY
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Due to unexpected luck, I got two 12.8V 200Ah RedOdo batteries with which I’m building a little 24V PV system.
Besides two “Smart Solar MPPT 75/15” I want to be able to charge the batteries with unused power from our big PV system. Therefore I want to take the current grit feeding value, that I get from my DIY PV monitoring system each 5 seconds, and use it to gain a smooth signal (basically averaged for less hopping) for a suitable charging power, so that I use as much unused PV energy as possible from our big PV system.
Gaining the suitable charging value is easy for me, but I want to make sure, that the hardware is suitable for the intented job.

I found the “Phoenix Smart IP43 Charger 24/25 (1+1) 120-240V” is able to be controlled via VE.Direct, where I can build a DIY control with Raspberry Pi, the protocol is very well described. But I can’t find any deeper information about details of the current control via VE.Direct.

My open questions:

  1. In which steps is the current adjustable? Only 100% and 50%, or is the more graduate?
  2. Is the current limiter, that come via VE.Direct, stored in some flash memory? If so, most probably it would no good idea to change the power limit automatically, as it would then wear the flash memory cells, what would then lead to a failure quite quick, when the system sends each 15 or 30 seconds new values. If it’s possible toput the VE.Direct current limit value only to RAM, then it should be fine to do so in long term use.
  3. Checking the Victron homepage, I found the page “Smart IP43 Charger”, which talks about a “Smart IP43 Charger” and a „Smart IP43 Charger 120-240V”. Both have slightly different technical data, where the weight is the most obvious one: 2.7kg vs 3.5kg. So I assume, they have different benefits, otherwise I would expect that one is the successor of the other. Unfortunately I can’t find clear information about the benefits of them, as both seem to have wide range PSU.
    And to even top it: Is the “Phoenix Smart IP43 Charger” a third group?
    I understand the “Blue line” is something different and more budgetary with less function, so they seem to be not suitable for my case.

My alternative is the „Mean Well NPB-750-24“, but I like the fact, that the „Smart IP43 Charger“ can connect to the Battery Sensor and the „Smart Solar MPPT“ via Bluetooth, to build a network. I already have a small 12,8V 100Ah RedOdo that uses two „Smart Solar MPPT 75/15“ which work since 1.5 years perfect and impresses me by the low heat they produce during operation.