Configure Victron Multiplus-2 GX 48/5000 with two Pylontech US5000

DIY
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1

Hello.

What is the proper way to configure Pylontech battery for maximum longevity?

I have Multiplus2 GX 48/5000 and two US5000.

I don’t want batteries to go below 20%.

I didn’t find such setting in remote VRM and in VE Configure 3 there are many settings but which one is correct?

Also, I read that it is recommended to charge the battery to 90%. Is it true?

If 20%-90% is optimal range, how to set it?

What is the proper voltage parameters?

In VE Configure there are following settings, that I don’t know how to adjust.

State of charge when Bulk finished: 95%. Should be 90%?

Charge efficiency: 0.95 What is it?

DC input low shut-down: 45 V

DC input low restart: 48 V

DC input low pre-alarm: 48 V

Should these be changed to achieve 20%?

shut-down on SOC is unchecked.

Absorption voltage: 53.25 V (Victron recommends lower?)

Float voltage: 51 V

Repeated absorption time: 1 Hr

Repeated absorption interval: 7 days

Absorption time: 1 Hr

But in Remote console in Settings→Devices→Pylontech batteries→Parameters I have the following:

Charge voltage limit: 52.8 V (but above Absorption voltage: 53.25 V)

Charge current limit: 180A (but Victron’s max is 70A)

Discharge Current Limit: 200A

I would be grateful if you could help me set up the system to maximize battery life.

Thank you.

2

Theres also descriptions for each setting in the manuals of the respective devices.

If your using ESS you can set a minimal SOC for that. Otherwise SOC isnt really used as a control parameter, most charge/discharge settings are done through voltage

3

I don’t use ESS.

What are the voltage parameters that will ensure 20%-90% range?