Prioritizing MPPT inputs over Phoenix Charger via voltage differential?

DIY
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1

Hello, I would like to configure my Victron system to use solar power for DC loads when the sun is out and the batteries are already at storage voltage. I see that the Multiplus already has this kind of feature built in, but alas, I have a Phoenix Charger. So I am wondering if I can set the MPPT to a higher storage voltage to get a similar effect.

For example, I could have shore=13.49V/mppt=13.5V (+.01V), or shore=13.50/mppt=13.51 (+.01V, slightly over storage voltage spec)?

I have:

  • 4x200A 12V Victron Smart Lithium batteries,
  • a Victron Phoenix Charger,
  • 3x Victron MMPTs,
  • a Lynx BMS.

Is this a valid idea? If yes, how much of a voltage delta is needed to have the desired effect? Is the storage voltage a strict limit or is there any tolerance around it?

Thanks!

2

With different gear it’s what I’ve done for years
MPPT 13.5
Charger 13.49
It may need more but you should see that easily.